TWI582372B - Cross arch - Google Patents

Description

Cross bow drawing structure

The invention relates to the technical field of a bow structure, in particular to a cross bow drawing structure.

According to the structure of the conventional crossbow, as disclosed in the Chinese Patent No. 207344, it comprises a gun body, a bow portion which is disposed at the front end of the gun body, a bow string connecting the two ends of the bow portion, and a bearing body. A puller that interacts with the bow and the bowstring. The string is pulled through the stringer to form a tension and interact with the trigger of the gun body.

The string puller of the prior art case is formed by bending a steel wire of a predetermined wire diameter according to a predetermined contour, and the outline thereof is slightly U-shaped, and the two free ends of the stringer have a hook. Department, used to hook the bowstring. However, there are still some shortcomings in this prior art, such as:

1. The conventional stringer is arranged along both sides of the direction in which the gun body extends. The hook of the free end of the stringer is designed according to the unconstrained structure, and is often subjected to the force when pulling the bowstring, and will face each other toward the gun body. In addition to the easy friction with the gun body, the wear of the gun body and the stringer also detracts from the force (pull) applied by the user on the stringer.

2. When the conventional puller is not returned to the original position, the user can still install the bow and arrow without any hindrance, and can also buckle the trigger to release the bowstring. In addition to the bow line released The process has caused obstacles and does not have the effect of preventing fools.

In view of the above problems and deficiencies of the prior art, the main object of the present invention is to provide a crossbow drawing structure, which overcomes the lack of inconvenience and structure of the conventional stringer structure by the design of the structure.

According to the above object of the present invention, a crossbow chord structure is proposed, the crossbow including a gun body, a bow portion disposed transversely to the front end of the gun body, and a bowstring connecting the ends of the bow portion. The chord structure comprises two tie rods, a cross bar and a force applying unit. Each of the tie rods is movable and symmetrical on both sides of the gun body. The crossbar is connected to the front end of each of the rods, and is slidably disposed on the top surface of the gun body. The force applying unit is connected to the rear ends of the rods, and provides a user to apply force to move the rods along the gun body and pull the bow strings to a preset position. Through the composition of the above-mentioned members, the crossbars are restrained by the crossbars to avoid deformation of the respective tie rods due to the force of the bowstrings during the pulling of the bowstrings, and the friction with the gun body is missing.

12‧‧‧ gun body

122‧‧‧ Arrow slot

124‧‧‧ recess

126‧‧ ‧ chute

14‧‧‧Bow Department

16‧‧‧ bowstring

20‧‧‧ string structure

21‧‧‧ lever

212‧‧‧ hook

214‧‧‧Perforation

216‧‧‧Facade

22‧‧‧shims

222‧‧‧ Straight Department

224‧‧‧ traverse department

226‧‧‧through hole

228‧‧‧Positioning column

23‧‧‧Sliding shaft

232‧‧‧ Ring groove

24‧‧‧crossbar

25‧‧‧ force unit

Figure 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is a partially exploded perspective view of the embodiment shown in Fig. 1.

Fig. 3 is a cross-sectional view showing the embodiment 3-3 shown in Fig. 1.

Figure 4 is a schematic view (1) of the operation of the embodiment of the present invention.

Figure 5 is a schematic diagram (2) of the operation of the embodiment of the present invention.

In the following, the embodiment of the present invention will be further described with reference to the accompanying drawings. In order to facilitate the understanding of the embodiments of the present invention, the same components are denoted by the same reference numerals.

Referring to Figures 1 through 5, the crossbow structure generally includes a body 12, a bow portion 14 disposed transversely to the front end of the body, and a bowstring 16 connecting the ends of the bow portion 14. The technical feature of the string structure 20 of the present invention comprises two tie rods 21, two spacers 22, two sliding shafts 23, a crossbar 24 and a force applying unit 25.

The gun body 12 has at least one arrow groove 122, a concave portion 124 and a plurality of sliding grooves 126. The arrow groove 122 is provided along the top end surface of the gun body 12 in the extending direction. The concave portion 124 is formed on the front end surface of the front end portion of the gun body 12, and the concave portion 124 has a slope on one side adjacent to the top end surface of the gun body 12. Each of the chutes 126 is symmetrically formed on both sides of the direction in which the gun body 12 extends.

Each of the above-mentioned tie rods 21 is symmetrically disposed on both sides of the gun body 12, and is moved by the external force to move in the direction in which the gun body 12 extends. Each of the tie rods 21 has at least one hook portion 212 formed on the front end of the tie rod 21 and has a plurality of through holes 214 extending through the hook portion 212 and a vertical surface 216 orthogonal to the top end of the tie rod 21. In implementation, when the pull rods 21 are moved in a predetermined direction, the hook portions 212 can simultaneously pull the bow strings 16.

Each of the spacers 22 is disposed corresponding to the hook portion 212 to partition the hook portion 212 from the gun body 12, and has an integrally formed permanent blocking portion 222, a transverse blocking portion 224, and a spacer. Through hole 226 and a positioning post 228. The straight portion 222 and the cross portion 224 are orthogonally connected at one end, and the hook portion 222 and the vertical surface 226 are partially covered by the straight and lateral portions 222 and 224. The through hole 226 is formed through the spacer 22 and corresponds to one of the through holes 214 of the hook 212. One of the through holes 214 of the positioning post 228 corresponding to the hook portion 212 is formed on the straight portion 222 for insertion into the corresponding through hole 214.

One end of each of the sliding shafts 23 has a ring groove 232 matching the sliding groove 126, and the other end penetrates the corresponding hole 214 of the hook portion 212. The respective pull rods 21 are restrained to move along the sliding grooves 126 through the respective sliding shafts 23.

The crossbar 24 is interlocked with the hook portion 212 of each of the pull rods 21 across the gun body 12 to restrain the displacement of the tie rods 21. And the normal state is accommodated in the recess 124 of the gun body 12.

The force applying unit 25 is connected to one end of each of the pull rods 21 to provide a user to force the movement of each of the pull rods 21, and the structure thereof comprises, but is not limited to, connected to the pull rods 21, and provides a pull handle for pulling by the user (such as the previous case). No. 207344), or pivotally connected to each of the tie rods, and the structure of the handle is interlocked in a pulling manner, as shown in Fig. 4.

Therefore, the above is a description of a cross-bow chord structure, various components and assembly methods according to a preferred embodiment of the present invention. The actuation features of the embodiments of the present invention are further described below.

The user moves the respective rods 21 (sliding shafts 23) through the force applying unit 25 to move along the extending direction of the gun body 12 (the chute 126). During the process, the rods 21 (the hook portions 212) are subjected to the cross rod 24 and the sliding shaft 23 and the gun. Body 12 chute 126 restraint, let each rod 21 is symmetric with each other and parallel to the sides of the gun body 12, and while the rods 21 are displaced rearwardly along the gun body 12, the hook portion 212 pulls the bow string 16 toward the trigger of the gun body 12 until the bow string 16 and the gun body 12 are triggered. After the jamming is formed, the tie rods 21 can be returned.

The user reversely moves the pull rods 21 back through the force applying unit 25, and the horizontal rods 24 are received in the concave portion 124 of the gun body 12, and the cross rods 24 are immersed in the gun body 12 through the concave portions 124, leaving the top surface of the gun body 12, When the user inserts the bow 30 into the arrow groove 122, it will interfere with the crossbar 24, and the opposite side is provided as a foolproof reminder to prevent the user from rushing to the arrow before the levers 21 are actually returned. It is further avoided that the string pulling mechanism 20 forms an obstacle during the release of the bowstring 16.

The above description is only for the preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Changes that are well known to those skilled in the art are still within the scope of the invention.

12‧‧‧ gun body

122‧‧‧ Arrow slot

124‧‧‧ recess

126‧‧ ‧ chute

14‧‧‧Bow Department

16‧‧‧ bowstring

20‧‧‧ string structure

25‧‧‧ force unit

Claims (7)

A crossbow chord structure, the crossbow including a gun body, a bow portion disposed at a front end of the gun body, and a bow string connecting the two ends of the bow portion, wherein the chord structure includes two tie rods, a crossbar and a force applying unit; each of the tie rods is movable and symmetrically disposed on two sides of the gun body; the crossbar is connected to the front ends of the rods, and is slidably disposed on the top surface of the gun body; The force unit is connected to the rear ends of the rods, and provides a user to apply force to move the rods along the gun body to move back and forth, and pull the bow strings to a preset position. The cross-bow chord structure of claim 1, wherein the front end surface of the gun body further has a recess for providing the crossbar to be immersed. The cross-bow chord structure according to claim 2, wherein the gun body further has a plurality of chutes, each of the chutes being symmetrically formed along two sides of the gun body extending direction, and each of the rod front ends is provided Pivot. The cross-bow chord structure of claim 3, wherein each of the pull rods further cooperates with a sliding shaft, and is respectively pivotally connected to each of the sliding slots, and one end of the sliding shaft has a ring groove and the other end is pivoted. Connect the lever. The cross-bow chord structure of claim 4, wherein each of the pull rods is further provided with a gasket through which the gun body and each of the pull rods are separated. Such as the crossbow drawing structure described in claim 5, wherein each of the pulls The rod further includes a hook portion formed on the front end of the rod and having a plurality of perforations formed through the hook portion. The cross-bow chord structure according to claim 6, wherein the spacer is disposed corresponding to the hook portion, and has an integrally formed straight stop portion, a cross stop portion, and a positioning post; wherein the straight portion The hook portion is orthogonally connected to the one end side, and the hook portion is partially covered by the straight and the cross portion; the positioning post is formed on the straight portion of each of the through holes corresponding to the hook portion for Insert the corresponding perforations.