Reciprocal vibration type electric engraving pen

Abstract

The present invention provides a reciprocal vibration type electric engraving pen driven by a main transmission shaft to operate. The engraving pen contains a rear shell assembled with a front shell. The rear shell positions the main transmission shaft. A top front of the driving shaft is assembled with an off-centered driving bead, and the front shell is assembled with a driven shaft. The engraving pen is characterized in that a rear end of the driven shaft is assembled radially with a driven pillar, and the driving shaft is formed integrally with a connection barrel. Accordingly, when the main transmission shaft drives the driving shaft to rotate, the driving bead revolves on a circular track simultaneously. When the driving bead revolves by one turn, the driven pillar is hit twice and vibrates double times. Furthermore, the driven shaft can rotate clockwise and counterclockwise, and the lifetime is extended.

Claims

1. A reciprocal vibration type electric engraving pen, being driven by a main transmission shaft, comprising a rear shell, which is assembled with a front shell and is a hollow cylinder, with a rear end of the rear shell providing for the main transmission shaft to be positioned quickly, and an interior of the rear shell being assembled with a driving shaft, a first bearing, a second bearing, a collar, a small bearing and a C-shaped snap ring; with the driving shaft being transfixed respectively into the first bearing, the second bearing, the collar, the small bearing and the C-shaped snap ring; with a rear end of the driving shaft being a connection barrel to connect the main transmission shaft, a top front of the driving shaft being assembled with a driving bead, and the driving bead being off-centered on the top front of the driving shaft; and a front shell, which is a hollow cylinder and an interior of which is assembled with a buffer seat, a driven shaft, a spring, and a top assembly liner respectively, with the top assembly liner being assembled at a front end in the front shell to position the driven shaft in the front shell, a position of the driven shaft providing for abutting the spring, and a front end of the driven shaft being a chuck; wherein a rear end of the driven shaft is assembled with a driven pillar, the driven pillar is radially arranged on the rear end of the driven shaft, the driven shaft provides for touching the driving bead at front of the driving shaft, the driving shaft and the connection barrel are integrally formed, and the driving shaft is driven directly by the main transmission shaft to rotate; when the main transmission shaft drives the driving shaft to rotate, the driving bead revolves on a circular track simultaneously; whereas when the driven shaft is at a withdraw position, the driving bead hits the driven pillar twice while revolving by one turn, thereby achieving the object of double vibration for the driven shaft.

2. The reciprocal vibration type electric engraving pen, according to claim 1, wherein a converged portion is disposed at a location close to a rear end of the rear shell, the converged portion is provided with a positioning slot, the positioning slot contains a steel ball, a C-shaped reed encloses the converged portion of the connection barrel, the C-shaped reed is provided with a small hole, an outer surface of the main transmission shaft is provided with a hole slot, the steel ball is positioned in the positioning slot, the steel ball is limited by the small hole of the C-shaped reed without moving outward, and the steel ball is locked in the locking slot of the main transmission shaft.

3. The reciprocal vibration type electric engraving pen, according to claim 1, wherein an inner wall in front of the rear shell is provided with an internal thread, an outer wall at rear of the front shell is provided with an external thread, an inner wall in front of the front shell is provided with an internal thread, the internal thread in front of the rear shell is assembled with the external thread at rear of the front shell, an outer periphery of the top assembly liner is provided with an external thread, the internal thread on the inner wall in front of the front shell is assembled with the external thread of the top assembly liner, and a surface of the front shell is provided with a corrugated mark.

4. The reciprocal vibration type electric engraving pen, according to claim 1, wherein an inner wall of the rear shell is provided with a baffle ring to stop the small bearing, the driving shaft is provided with a ring groove, and the C-shaped snap ring is locked in the ring groove of the driving shaft.

5. The reciprocal vibration type electric engraving pen, according to claim 1, wherein the connection barrel is provided with a locking slot, a periphery in front of the main transmission shaft is provided with an axial rib, and the axial rib is latched in the locking slot for engaging.

6. The reciprocal vibration type electric engraving pen, according to claim 1, wherein a top front of the driving shaft is provided with a round groove, the round groove provides for emplacing the driving bead, a periphery in front of the driving shaft is inserted with a stake, and the stake is transfixed into the driving bead to be engaged in the round groove.

7. The reciprocal vibration type electric engraving pen, according to claim 1, wherein a top rear of the driven shaft is provided radially with a semi-circular groove, and the semi-circular groove provides for inserting the driven pillar.

8. The reciprocal vibration type electric engraving pen, according to claim 1, wherein an inner wall of the front shell is provided with a flange ring, the buffer seat is a cylinder and is provided with a head cover, the head cover is abutted on the flange ring, and a convex ring is disposed on the driven shaft at a location close to the top assembly liner to provide for abutting the spring.

9. The reciprocal vibration type electric engraving pen, according to claim 8, wherein the spring is disposed between the convex ring and the top assembly liner to provide the driven shaft with a backward elastic force.

10. The reciprocal vibration type electric engraving pen, according to claim 8, wherein the spring is disposed between the convex ring and the head cover of the buffer seat to provide the driven shaft with a forward elastic force.

11. The reciprocal vibration type electric engraving pen, according to claim 1, wherein the chuck at front of the driven shaft is controlled by an adjustment clip, the chuck is provided with an external thread, the adjustment clip is provided with an internal thread, and the internal thread rotates the adjustment clip to control the inner diameter of the chuck.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a three-dimensional assembly view of a conventional reciprocal vibration type electric engraving pen.

(2) FIG. 2 shows a cutaway view of the conventional reciprocal vibration type electric engraving pen, wherein a driven shaft moves backward.

(3) FIG. 3 shows a cutaway view of the conventional reciprocal vibration type electric engraving pen, wherein a driving bead does not hit a driven pillar.

(4) FIG. 4 shows a cutaway view of the conventional reciprocal vibration type electric engraving pen, wherein the driven shaft moves forward.

(5) FIG. 5 shows a cutaway view of the conventional reciprocal vibration type electric engraving pen, wherein the driving bead hits the driven pillar.

(6) FIG. 6 shows a three-dimensional assembly view of the present invention.

(7) FIG. 7 shows a three-dimensional exploded view of the present invention.

(8) FIG. 8 shows a cutaway view of the present invention, wherein a spring is disposed between a convex ring and a top assembly liner.

(9) FIG. 9 shows a cutaway view of the present invention, wherein a driving bead touches a rear end of a driven shaft.

(10) FIG. 10 shows a cutaway view of the present invention, wherein the driving bead hits a right side of a driven pillar.

(11) FIG. 11 shows a cutaway view of the present invention, wherein the driving bead hits a left side of the driven pillar.

(12) FIG. 12 shows a cutaway view of the present invention, wherein a driven shaft moves forward a little.

(13) FIG. 13 shows a cutaway view of another embodiment of the present invention, wherein the spring is disposed between the convex ring and a head cover of a buffer seat.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(14) Referring to FIG. 6, FIG. 7, and FIG. 8 for a first embodiment of the present invention, a main transmission shaft 10 drives an engraving pen 30 to operate, an interior of the main transmission shaft 10 is provided with an axle center 11 (can be a conventional design), and the axle center 11 is driven by a motor (the motor and the main transmission shaft 10 belong to the conventional technology). The engraving pen 30 comprises primarily a rear shell 31, a front shell 32, a driving shaft 33, a first bearing 34, a second bearing 341, a collar 342, a small bearing 343, a C-shaped snap ring 344, a buffer seat 35, a driven shaft 36, a spring 37, a top assembly liner 38, and an adjustment clip 39. The rear shell 31 is assembled with the front shell 32. An inner wall at front of the rear shell 31 is provided with an internal thread 311, an outer wall at rear of the front shell 32 is provided with an external thread 321, an inner wall at front of the front shell 32 is provided with an internal thread 322, and the internal thread 311 at front of the rear shell 31 is assembled with the external thread 321 at rear of the front shell 32. The rear shell 31 is a hollow cylinder, a converged portion 310 is disposed near the rear end of the rear shell 31, the converged portion 310 is provided with a positioning slot 313, and the positioning slot 313 contains a steel ball 314. A C-shaped reed 12 encloses the converged portion 310 of a connection barrel 331, and is provided with a small hole 121. An outer surface of the main transmission shaft 10 is provided with a hole slot 101, and the steel ball 314 is positioned in positioning slot 313. The steel ball 314 is also limited by the small hole 121 of the C-shaped reed 12 without moving outward, and can be locked in the hole slot 101 of the main transmission shaft 10. The C-shaped reed 12 is provided with an elastic force to expand and restore, allowing the converged portion 310 at the rear end of the rear shell 31 to rapidly position the main transmission shaft 10 (the rapid position belongs to the conventional technology). An interior of the main transmission shaft 10 is provided with a rotating axle center 11. An interior of the rear shell 31 is assembled with the driving shaft 33, the first bearing 34, the second bearing 341, the collar 342, the small bearing 343, and the C-shaped snap ring 344. A rear end of the driving shaft 33 is provided with the connection barrel 331 for connecting the axle center 11 of the main transmission shaft 10. The driving shaft 33 and the connection barrel 331 are integrally formed. An interior of the connection barrel 331 is provided with a locking slot 332, a periphery at front of the axle center 11 of the main transmission shaft 10 is provided with an axial rib 111, and the axial rib 111 is latched in the locking slot 332 for engaging, so that the driving shaft 33 can be driven directly by the axle center 11 of the main transmission shaft 10 to rotate. A top front of the driving shaft 33 is assembled with a driving bead 333, the driving bead 333 is off-centered on the top front of the driving shaft 33, and the top front of the driving shaft 33 is provided with a round groove 334. The round groove 334 provides for the driving bead 333 to enter, and a periphery at front of the driving shaft 33 is inserted with a stake 335. The stake 335 is transfixed into the round groove 334 and the driving bead 333 to position the driving bead 333 in the round groove 334. The inner wall of the rear shell 31 is provided with a baffle ring 312 to abut the small bearing 343, the driving shaft 33 is provided with a ring groove 336, and the C-shaped snap ring 344 is snapped in the ring groove 336 of the driving shaft 33. The C-shaped snap ring 344 and the collar 342 are used to position the small bearing 343, the first bearing 34 and the second bearing 341.

(15) The front shell 32 is a hollow cylinder, and its surface is provided with a corrugated mark to increase the holding power of a user's fingers. An interior of the front shell 32 is assembled respectively with the buffer seat 35, the driven shaft 36, the spring 37, and the top assembly liner 38. The top assembly liner 38 is assembled at a front end in the front shell 32, and positions the driven shaft 36 in the front shell 32. A front end of the driven shaft 36 is a chuck 362, an outer periphery of the top assembly liner 38 is provided with an external thread 381, and the inner thread 322 on the inner wall at front of the front shell 32 provides for assembling with the external thread 381 of the top assembly liner 38. A rear end of the driven shaft 36 is assembled with a driven pillar 363, the rear end of the driven shaft 36 is provided radially with a semi-circular groove 364, the semi-circular groove 364 provides for emplacing the driven pillar 363, and the dimeter of the opening of the semi-circular groove 364 is smaller than the diameter of the driven pillar 363. The driven pillar 363 enters in the driven shaft 36 from a side of the semi-circular groove 364 and is steady without sloshing freely. The driven pillar 363 is radially arranged on the rear end of the driven shaft 36, and can provide for touching the driving bead 333 at front of the driving shaft 33. An inner wall of the front shell 32 is provided with a flange ring 323, the buffer seat 35 is a cylinder and is provided with a head cover 351, and the head cover 351 can be abutted on the flange ring 323. A convex ring 361 is disposed on the driven shaft 36 at a location close to the top assembly liner 38, the convex ring 361 provides for abutting the spring 37, and the spring 37 can be disposed between the convex ring 361 and the top assembly liner 38, providing the driven shaft 36 with a backward elastic force (if the spring 37 is disposed between the convex ring 361 and the head cover 351 of the buffer seat 35, then the spring 37 can provide the driven shaft 36 with a forward elastic force, which is another embodiment to be described later). The diameter of the chuck 362 at front of the driven shaft 36 is controlled by the adjustment clip 39; the chuck 362 is provided with an external thread, and the adjustment clip 39 is provided with an internal thread to rotate the adjustment clip 39, thereby controlling the diameter of the chuck 362.

(16) By the abovementioned structures, a first embodiment of the present invention is shown in FIG. 7, FIG. 8, and FIG. 9, which is an all-time vibration mode. In operation, a cutlery is first inserted into the chuck 362. The adjustment clip 39 is rotated to shrink the diameter of chuck 362 to tighten the cutlery, and then the axle center 11 of the main transmission shaft 10 is assembled in the connection barrel 331 of the driving shaft 33 (belongs to the conventional technology). At this time, the driving bead 333 touches the rear end of the driven shaft 36 (as the spring 37 is assembled between the convex ring 361 and the top assembly liner 38 to provide the driven shaft 36 with the backward elastic force, the rear end of the driven shaft 36 will touch the driving bead 333 at all time, as shown in FIG. 8 and FIG. 9), and then the motor is activated. The axle center 11 of the main transmission shaft 10 drives the driving shaft 33 to rotate, the driving bead 333 on the top front of the driving shaft 33 follows the driving shaft 33 to rotate and revolve along a circular track, and when the driving bead 333 moves, it will hit a right side of the driven pillar 363 (as shown in FIG. 10). The driven pillar 363 drives simultaneously the driven shaft 36 and the cutlery to move forward a little (as shown in FIG. 12). When the driving bead 333 skips the driven pillar 363 and does act force onto the driven shaft 36, the driven shaft 36 will move backward a little by the elastic force of the spring 37, and then the driving bead 333 will touch the rear end of the driven shaft 36 again, waiting to revolve and hit a left side of the driven pillar 363 for a next time (as shown in FIG. 11). Accordingly, when the driving bead 333 revolves by one turn, it can hit the driven pillar 363 twice, and therefore, the driven shaft 36 is provided with a double vibration effect.

(17) The driving shaft 33 and the connection barrel 331 are formed integrally without connection with a thread. Therefore, there is no issue that the driving shaft gets loose from the connection barrel as the conventional technology. In addition, there are no issues of sloshing, imbalance, and over-heating due to the loosening problem. Furthermore, there is also no issue like the conventional technology that it can only rotate clockwise without counterclockwise. As the driving shaft 33 and the connection barrel 331 are formed integrally in manufacturing, the assembly can be simple and precise.

(18) Referring to FIG. 13, it shows a second embodiment of the present invention, which is a half-time vibration mode. The spring 37 is assembled between the convex ring 361 of the driven shaft 36 and the head cover 351 of the buffer seat 35. The spring 37 provides the driven shaft 36 with a forward elastic force. When the cutlery does not apply pressure to an object, the rear end of the driven shaft 36 will not touch the driving bead 333. When a user's hand uses the cutlery to apply force to the object, the driven shaft 36 will move backward a little, allowing the rear end of the driven shaft 36 to touch the driving bead 333. When the driving bead 333 rotates, the driving bead 333 will hit the driven pillar 363. At this time, the engraving pen can operate as the abovementioned implementation method to vibrate the driven shaft 36 and the cutlery to work.

(19) The present invention is provided with the following advantages: 1. The driving shaft 33 and the connection barrel 331 are formed integrally in manufacturing without adaptation with the thread. The entire manufacturing is improved and the assembly is simple and precise. Therefore, there will be no imbalance, too much vibration and over-heating in operation. 2. As the driving part (the driving shaft 33 and the connection barrel 331) are formed integrally in design, it can rotate clockwise and counterclockwise and the driving shaft 33 will not get loose from the connection barrel 331. In addition, a counterclockwise rotation can be added to the operation. As a different friction point loss can be resulted by the operation in a different direction (the friction point in clockwise rotation is different from the friction point in counterclockwise rotation), there will be no single point loss (steel ball to steel ball) as in the convention technology. Therefore, under a same rotation speed, the lifetime of the driven pillar 363 and the driving bead 333 can be doubled. 3. The driving part in the present invention is the driving bead 333 (steel ball), and the driven part is the driven pillar 363 (steel pillar). Therefore, even there is a little free gap in assembling the driving bead 333, as the driven pillar 363 is steady and immobilized, the output power will be more accurate and stable when the driven pillar 363 operates by one turn. As the output power is accurate and stable, the amplitude is steady without decreasing, and the processing power is accurate. 4. In the same rotation speed, when the driving bead 333 rotates by one turn relative to the driven pillar 363 to result in two times of friction operation by hitting, the efficiency will be doubled. When the driving bead 333 revolves by one turn, the driving pillar 363 can be hit twice, achieving the effect of double vibration of the driven shaft 36 (in the present invention, the motor output is 12,000 turns per minute, and then the driven shaft can achieve 24,000 times of vibration per minute). Therefore, the shortcomings in the conventional technology that the cutlery can only achieve the maximum but same rotation speed as the rotation speed of the motor, and the amplitude will still decrease (insufficient) can be improved. 5. By the different location at which the spring 37 is assembled, a different effect of operation will be resulted. When the spring 37 is assembled between the convex ring 361 of the driven shaft 36 and the head cover 351 of the buffer seat 35, the operation can be only resulted when the driven part is given inward pressure. On the contrary, when the spring 37 is assembled between the convex ring 361 of the driven shaft 36 and the top assembly liner 38, the driving part and the driven part are given all-time pressure. This method can be used for filing and grinding and is a double effect that the conventional technology cannot achieve. 6. The driving part hits the driven part in a point-to-point manner, and therefore, the loss rate is small and the lifetime is long.

(20) It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.