Device for connecting lens and earmuff to safety helmet

Abstract

A device for connecting a lens and an earmuff to a safety helmet is disclosed. The device includes a retaining frame, two pivot members and two connecting units. The retaining frame includes a pivot portion on either side thereof and an engaging block on the pivot portion. The pivot members are pivotally connected to the pivot portions, respectively. The pivot member has a slide portion having a first groove. The first pressing block is positioned in the first groove. The pivot member further includes a positioning strip having a plurality of second grooves. The connecting unit has a second slide groove. The positioning strip is inserted and slidable in the second slide groove. A second pressing block is disposed on an inner wall of the second slide groove. The second pressing block is pressed into any one of the second grooves in a multi-step manner.

Claims

1. A device for connecting a lens and an earmuff to a safety helmet, comprising: a retaining frame including a pivot portion coupled integrally to either side of the retaining frame, said pivot portion being configured with an engaging block positioned on an inner side of the pivot portion in an integral connection therewith, and a first pressing block on a periphery of the pivot portion; two pivot members, each pivot member of said two pivot members being pivotally connected to a respective pivot portion of the retaining frame, said each pivot member having an engaging slot corresponding in position and in shape to the engaging block, the engaging slot having a width greater than that of the engaging block for the engaging block to pass through the engaging slot, the each pivot member being rotatably connected to the respective pivot portion, a slide portion being provided on a periphery of the each pivot member and corresponding in position to the first pressing block, the slide portion having at least one first groove, wherein, when the respective pivot portion is turned relative to the pivot member, the first pressing block is forced to be positioned in the at least one first groove, so that the retaining frame is turned to an angle relative to the pivot member, the each pivot member further including a positioning strip connected integrally, at one end thereof, to said slide portion of said each pivot member, said positioning strip extending backward from said each pivot member and having a plurality of second grooves arranged continuously on an outer side of the positioning strip; two connecting units, each connecting unit of said two connecting units being coupled to a respective pivot member of the two pivot members, the each connecting unit having a second slide groove on an inner side thereof, the positioning strip being inserted and slidable in the second slide groove, a second pressing block being disposed on an inner wall of the second slide groove, wherein the second pressing block is pressed into a respective one of the second grooves in a multi-step manner, thus permitting the each pivot member to slide and extend to a length relative to the each connecting unit, the connecting unit further including an elastic insert.

2. The device as claimed in claim 1, wherein the retaining frame further includes a curved retaining face on a front edge thereof, a plurality of positioning posts on the retaining face, and at least one stop piece protruding from a top edge of the retaining face.

3. The device as claimed in claim 2, wherein a top edge of the lens has a plurality of positioning holes, the positioning posts of the retaining frame are inserted and positioned in the respective positioning holes of the lens, and the stop piece is configured to prevent the lens from detaching from the retaining frame.

4. The device as claimed in claim 1, wherein the engaging block is a linear block, and the at least one first groove is a linear groove.

5. The device as claimed in claim 1, wherein positioning blocks are disposed on upper and lower sides of the second groove, so as to prevent the positioning strip from sliding out of the second groove.

6. The device as claimed in claim 1, wherein a fitting groove is formed on either side of the safety helmet, and the elastic insert is embedded and secured in the fitting groove.

7. The device as claimed in claim 1, wherein the elastic insert is located below the second slide groove.

8. The device as claimed in claim 1, wherein the each connecting unit further includes a locking portion on an outer side thereof and two stoppers above the locking portion.

9. The device as claimed in claim 8, wherein the earmuff is locked to a respective connecting unit of said two connecting units, wherein the earmuff includes a locking block on an upper end thereof and a protruding plate on a top edge of the locking block, wherein the locking block is locked in the locking portion, and the protruding plate is engaged in the two stoppers, thus preventing the earmuff from detaching from the respective connecting unit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is an exploded view of an embodiment of the present invention;

(2) FIG. 2 is a partial, exploded view of the embodiment of the present invention;

(3) FIG. 3 is a perspective view of the embodiment of the present invention;

(4) FIG. 4 is a schematic view showing the connection of the pivot member and the pivot portion of the embodiment of the present invention;

(5) FIG. 5 is a schematic view showing the connection of the connecting member and the pivot member of the embodiment of the present invention;

(6) FIG. 6 is a cross-sectional view showing the assembly of the connecting member and the pivot member of the embodiment of the present invention;

(7) FIG. 7 is a schematic view showing the embodiment of the present invention secured to a safety helmet when in use;

(8) FIG. 8 is a schematic view showing the embodiment of the present invention in cooperation with an earmuff when in use;

(9) FIG. 9 is a schematic view showing the earmuff secured to the connecting unit of the embodiment of the present invention;

(10) FIG. 10 is a schematic view of the embodiment of the present invention, wherein the lens is flipped upward relative to the retaining frame;

(11) FIG. 11 is a schematic view of the embodiment of the present invention, wherein the positioning strip is moved relative to the connecting unit;

(12) FIG. 12 is a cross-sectional view of the embodiment of the present invention, wherein the positioning strip is moved relative to the connecting unit;

(13) FIG. 13 is a schematic view of the embodiment of the present invention, wherein the pivot portion is turned relative to the pivot member; and

(14) FIG. 14 is a schematic view of the embodiment of the present invention, wherein the lens is inserted obliquely between the stop piece and the retaining face.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(15) Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

(16) As shown in FIG. 1, FIG. 2, and FIG. 3, the embodiment of the present invention comprises a retaining frame 1, two pivot members 2, and two connecting units 3.

(17) The retaining frame 1 includes a curved retaining face 11 on a front edge thereof, a plurality of positioning posts 12 on the retaining face 11, and at least one stop piece 13 protruding from a top edge of the retaining face 11. A pivot portion 14 is disposed on either side of the retaining frame 1. An engaging block 15 is disposed on an inner side of the pivot portion 14. The engaging block is a linear block. A first pressing block 16 is disposed on the periphery of the pivot portion 14.

(18) The two pivot members 2 are pivotally connected to the two pivot portions 14, respectively. As shown in FIG. 4, FIG. 5 and FIG. 6, the pivot member 2 has an engaging slot 21 corresponding in position and in shape to the engaging block 15. The width of the engaging slot 21 is slightly greater than that of the engaging block 15 for the engaging block 15 to pass through the engaging slot 21. Then, the pivot member 2 is rotatably connected to the pivot portion 14. A slide portion 22 is provided on the periphery of the pivot member 2, corresponding in position to the first pressing block 16. The slide portion 22 has at least one first groove 23. When the pivot portion 14 is rotated relative to the pivot member 2, the first pressing block 16 is forced to be positioned in the first groove 23 (as shown in FIG. 13) so that the retaining frame 1 is rotated to an appropriate angle relative to the pivot member 2. The pivot member 2 further includes a positioning strip 24 extending backward and a plurality of second grooves 25 that are arranged continuously on an outer side of the positioning strip 24.

(19) The two connecting units 3 are coupled to the two pivot members 2, respectively. The two connecting units 3 each have a second slide groove 31 on an inner side thereof, so that the positioning strip 24 is inserted and slidable in the second slide groove 31. A second pressing block 32 is disposed on the inner wall of the second slide groove 31. The second pressing block 32 is pressed into any one of the second grooves 25 in a multi-step manner, so that the pivot member 2 (together with the retaining frame 1) can slide and extend to an appropriate length relative to the connecting unit 3. Positioning blocks 33 are disposed on the upper and lower sides of the second groove 31, so as to prevent the positioning strip 24 from sliding out of the second groove 31. The connecting unit 3 further includes an elastic insert 34 below the second slide groove 31. The connecting unit 3 further includes a locking portion 35 on an outer side thereof and two stoppers 36 above the locking portion 35.

(20) When in use, as shown in FIG. 7, FIG. 8 and FIG. 9, the present invention cooperates with a safety helmet A, a lens B and two earmuffs C. A fitting groove A1 is formed on either side of the safety helmet A. The top edge of the lens B has a plurality of positioning holes B1. The earmuff C includes a locking block C1 on an upper end thereof and a protruding plate C2 on the top edge of the locking block C1. First, the upper edge of the lens B is inserted between the stop piece 13 on the front edge of the retaining frame 1 and the top edge of the retaining face 11 (as shown in FIG. 14). Then, a force is applied to the upper edge of the lens B, so that the positioning posts 12 of the retaining frame 1 are inserted into the positioning holes B1 of the lens B to be positioned one by one. The stop piece 13 on the top edge of the retaining face 11 is configured to prevent the lens B from detaching from the retaining frame 1. Then, the protruding plate C2 of the earmuff C is inserted in the two stoppers 36 of the connecting unit 3. A force is applied to the locking block C1 of the earmuff C for the locking block C1 to be locked in the locking portion 35 of the connecting unit 3, and the protruding plate C2 of the locking block C1 is engaged in the two stoppers 36 of the locking portion 35, so as to prevent the earmuff C from detaching from the connecting unit 3. Then, the elastic insert 34 of the connecting unit 3 is embedded and secured in the fitting groove A1 on either side of the safety helmet A, so that the lens B and the earmuffs C are combined with the safety helmet A quickly and easily, so as to protect the user's eyes and face and prevent noise interference or injury. The elastic insert 34 of the connecting unit 3 in the embodiment of the present invention can be embedded and secured in the fitting groove A1 of the general safety helmet A. Therefore, various safety helmets A sold in the market can be used in conjunction with the connecting unit 3 of the embodiment of the present invention.

(21) As shown in FIG. 10, FIG. 11 and FIG. 12, when it is necessary to match the length of the brim A2 of a different safety helmet A and the length of the lens B needs to be extended, the positioning strip 24 of the pivot member 2 is moved relative to the connecting unit 3, such that the second pressing block 32 on the inner wall of the second slide groove 31 of the connecting unit 3 can be positioned in any one of the second grooves 25 in a multi-step manner. The pivot member 2 and the retaining frame 1 (and the lens B) connected with the pivot member 2 can slide and extend out an appropriate length relative to the connecting unit 3.

(22) When it is necessary to flip the lens B to match the height of a different safety helmet A, the protruding length of the lens B is first adjusted, so that when the lens B is flipped, it will not interfere with the length of the brim A2 and the height of the safety helmet A. When the lens B is to be flipped, the pivot portion 14 of the retaining frame 1 is turned relative to the pivot member 2 (as shown in FIG. 13). The first pressing block 16 is forced to be positioned in the first groove 23, so that the retaining frame 1 is turned to an appropriate angle relative to the pivot member 2.

(23) In this way, the embodiment of the present invention utilizes three components, the retaining frame 1, the pivot member 2 and the connecting unit 3, to secure the lens B and the earmuffs C on the safety helmet A for use. There will be no disadvantage that only one of the lens B and the earmuff C can be used. Therefore, the components are very simple, and the assembly and disassembly are relatively easy. Besides, the present invention is suitable for the fitting and use of the general safety helmet A. There is no need to use another mold for manufacturing a lens B or an earmuff C that can cooperate with the safety helmet. Therefore, the manufacturing cost and the man-hours can be reduced greatly. Compared with the prior art that includes more than four components, the embodiment of the present invention includes three components to achieve the function of connecting earmuffs. Therefore, the embodiment of the present invention can optimize the overall structure, use fewer components, reduce the use of plastics greatly and reduce carbon emissions, so as to reduce the carbon footprint. The present invention can respond to the demand for carbon reduction, so as to meet the requirements of environmental protection, fulfill the social responsibility of the enterprise, comply with the trend in carbon reduction, and take into account sustainable development and enterprise survival.

(24) Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.