SHOCK ABSORBER FOR BACKPACK

Abstract

The present invention relates to a shock absorber for a backpack, which cushions an impact applied to the body of a user by the weight of the backpack when the user walks while carrying the backpack on his or her shoulders. The shock absorber can be simply attached to an existing strap of a backpack for use.

Claims

1. A shock absorber for a backpack, comprising: a body (10) which has one hollow end to be combinable with a mover (20) and another end to be combinable with a cover (30) and comprises a strap connector (12) combinable with a backpack strap together with a strap combiner (50) on one side; the mover (20) which comprises a spring container (24) to be combinable with a spring (60), a fixing pin groove (21) in the spring container to fix one end of the spring, and a strap connector combinable with the backpack strap together with a strap combiner; the cover (30) which is combined with the body and comprises a spring connector (31) connectable to one end of the spring; the two strap combiners (50) combinable with the strap connectors of the body and the mover to combine the backpack strap; and the spring (60) which has one end connectable to the fixing pin groove of the mover and another end connectable to the spring connector of the cover.

2. A shock absorber for a backpack, comprising: a mover which comprises spring containers combinable with springs on both sides, a fixing pin groove in each of the spring containers to fix one end of the spring, and a holding step (25) provided at another end to restrict a tensile length of the spring; two bodies which have one ends which are hollow to be combinable with the mover and other ends combinable with a cover. comprise a stopping step (19) corresponding to the holding step, and comprise strap connectors on one sides, which are combinable with a backpack strap together with strap combiners; two covers which are combined with the bodies and comprise spring connectors connectable to one ends of the springs; the two strap combiners combinable with the strap connectors of the bodies to be combinable with the backpack strap; and a plurality of such springs each of which has one end connectable to the fixing pin groove of the mover and another end connectable to the spring connector of the cover and has a different tensile force.

3. The shock absorber according to claim 1, comprising: the body and the mover, which comprise strap connectors comprising a plurality of needles (15); and the strap combiners which comprise a plurality of needles.

4. The shock absorber according to claim 1, comprising: the body which comprises a fastener groove (11) combinable with a fastener on one side; and the mover which comprises a holding groove (22) corresponding to a fastener (40) on one side.

5. The shock absorber according to claim 1, comprising: the body and the mover, which comprise strap connectors including lever type strap combiner grooves; and lever type strap combiners combinable with the strap connectors of the body and the mover.

6. The shock absorber according to claim 2, comprising: the body and the mover, which comprise strap connectors comprising a plurality of needles (15); and the strap combiners which comprise a plurality of needles.

7. The shock absorber according to claim 2, comprising: the body which comprises a fastener groove (11) combinable with a fastener on one side; and the mover which comprises a holding groove (22) corresponding to a fastener (40) on one side.

8. The shock absorber according to claim 2, comprising: the body and the mover, which comprise strap connectors including lever type strap combiner grooves; and lever type strap combiners combinable with the strap connectors of the body and the mover.

Description

DESCRIPTION OF DRAWINGS

[0014] FIG. 1 is a perspective view illustrating an embodiment of the present invention.

[0015] FIG. 2 is a perspective view illustrating an example of an operation of the present invention.

[0016] FIG. 3 is a perspective view illustrating an embodiment of a body.

[0017] FIG. 4 is a perspective view illustrating an embodiment of a mover.

[0018] FIG. 5 is a perspective view illustrating embodiments of a cover and a fastener.

[0019] FIG. 6 is a perspective view illustrating an embodiment of a strap combiner.

[0020] FIG. 7 is a cross-sectional view illustrating an example of the operation of the present invention.

[0021] FIG. 8 is a cross-sectional view illustrating an operation of the fastener and the strap combiner.

[0022] FIG. 9 is a perspective view illustrating an embodiment of a double buffering device.

[0023] FIG. 10 is a cross-sectional view illustrating an embodiment of the double buffering device.

[0024] FIG. 11 is a perspective view illustrating an example of mounting the present invention on a backpack.

MODES OF THE INVENTION

[0025] The present invention configured as described above will be described in detail as follows with reference to drawings.

[0026] A body 10 has a hollow structure as shown in FIG. 3 in which one end may be connected to a mover 20 and another end may be combined with a cover 30. A fastener groove 11 capable of being combined with a fastener 40 is provided at an upper end in a mover connection direction and a body strap connecter 12 is provided at a lower end of a cover combination direction so as to be combinable with a backpack's strap together with a strap combiner 50. Also, a fastener pin groove 13 is provided to be combined with a pin for maintaining a rotation axis of the fastener. As shown in FIGS. 3 and 8, a pivoting prevention groove 14 is provided in the body 10 to prevent the mover 20 from arbitrarily pivoting. A plurality of needles 15 capable of penetrating a backpack strap 70 are provided at the strap connector 12 to be strongly fastened to the backpack strap. Also, as shown in FIG. 7, a frictional force with the backpack strap is increased by providing a cascading tunnel step 16 at the strap connector 12 so as to strengthen a slip-resistant function of the backpack strap together with the strap combiner. Nut grooves 17 are provided at both ends of the strap connector to be combined with the strap combiner 50 using screws.

[0027] The mover 20 includes a hollow spring container 24 to be combined with a spring as shown in FIGS. 4 and 7, and a fixing pin groove 21 for a fixing pin is provided in the spring container to fix a buffer spring 60. A holding groove 22 corresponding to the fastener 40 is provided at the upper end such that the mover may be fixed as necessary. A strap connector 23 including a plurality of needles, cascading tunnel steps, and nut grooves is provided at the lower end like the body.

[0028] The cover 30 is connected to the buffer spring 60 combined with the mover and is combined with the body. Here, to this end, a spring connector 31 is provided as shown in FIGS. 5 and 7. The spring connector performs a function of connecting the mover to the body using the buffer spring.

[0029] The fastener 40 is combined with the body using a pin. To this end, a fastener pin groove 41 is provided as shown in FIG. 5. The fastener rotates leftward and rightward by a certain angle and performs as a switch which fixes the mover by operating with the holding groove 22 of the mover in one direction 40a and releases fixation of the mover in another direction 40b. A frictional force caused by a pressure of the spring is used to prevent the fastener from arbitrarily pivoting. To this end, a spring groove 43 for being combined with a fastener spring 42 is provided on one side. The fastener spring performs a function of preventing the fastener from arbitrarily pivoting due to a frictional force by pressing the fastener into a wall of the body.

[0030] Two strap combiners 50 having the same shape are included as shown in FIG. 6 and are combined with the strap connectors 12 and 23 of the body and the mover. To strongly fix the backpack strap, a plurality of needles 51 are provided at the strap combiner 50 and penetrate the backpack strap to prevent the backpack strap from slipping. Also, cascading tunnel steps 52 are included corresponding to the cascading tunnel steps of the body and the mover. Screw grooves 53 are provided at both ends to be combined with the nut grooves 17 of the body and the mover using screws.

[0031] The buffer spring 60 has one side combined with the fixing pin groove 21 of the mover 20 and another side combined with the spring connector 31 of the cover 30 to be connected to the body and to absorb a shock from the backpack as shown in FIG. 7.

[0032] The present technique may be applied to be utilizable as a double shock absorber. That is, as shown in FIG. 9, the device includes springs having different levels of intensity on both sides so as to increase a weight range of the backpack to which the device is applicable.

[0033] In detail, as shown in FIGS. 9 and 10, spring containers 24a and 24b capable of being combined with buffer springs are provided on both sides of a mover 20c, and corresponding bodies 10a and 10b and covers 30a and 30b are combined with the spring containers. A spring 60a having a low tensile force is combined with the spring container 24a on one side, and a spring 60b having a high tensile force is combined with the other spring container 24b.

[0034] To prevent the weak spring 60a from being excessively stretched while operating, a holding step 25 is provided at the spring container 24a and the body 10a includes a stopping step 19 corresponding thereto such that the strong spring 60b operates when the body 10a is held by the spring container 24a and the weak spring 60a does not operate any more.

[0035] Functions of fixing pin grooves 21a and 21b and spring connectors 31a and 31b are the same as described above.

[0036] Strap connectors 18a and 18b of the bodies include strap combiner connection grooves 51a and 51b to be combined with lever type strap combiners 50a and 50b.

[0037] The lever type strap combiners 50a and 50b include several needles 52a and 52b on strap-contact surfaces to further fasten the strap as the strap is pulled.

[0038] In an example of an operation of the present invention, the body 10 and the mover 20 are connected by the buffer spring 60 as shown in FIG. 7. As shown in FIG. 8, the backpack strap 70 is placed on the strap connectors 12 and 23 of the body and the mover and the strap combiners 50 are closed and fastened using screws and then combined with the backpack strap 70 with a marginal gap as an elongation length of the mover such that the mover freely elongates. Since the mover can elongate by the marginal length, the mover does not deviate from the body in any cases and an overload to the buffer spring is prevented. As shown in FIGS. 7 and 8, the mover is fixed and performs as a general backpack strap when the fastener is placed to perform a fastening function (40a), and a buffer function is performed by the buffer spring when the fastener is rotated and switched to perform a releasing function (40b).

[0039] That is, the buffer function may be used as necessary, and may be stopped when the buffer function is unnecessary. That is, on the move while the backpack is worn, the buffer function may be used or stopped by simply operating the fastener.

[0040] The present invention using the above technique is simply combined with a lower end of each of both straps of a backpack without any deformation of the backpack. An example of combining the present invention 100 with a backpack 200 is shown in FIG. 11.

[0041] The present invention is a useful technique which reduces an impact force of a weight of a backpack to a human body so as to prevent knee joint diseases and the like caused by wearing a heavy backpack and to reduce a fatigue degree.