Sleeve sewing gun

Abstract

The invention provides a rotator cuff suture gun, and relates to the field of medical instruments. The rotator cuff sewing gun comprises a gun body and a front handle, the lower end of the front handle is movably connected to the position, close to the lower end, of the center of the front side wall of the gun body, the front end of the front handle is movably connected with a connector, a gun barrel is connected to the center of the front side wall of the connector in a penetrating mode, and a movable groove is formed in the position, close to the upper end, of the center of the rear side wall of the front handle. And the movable groove penetrates through the rear side wall of the front handle and is communicated to the interior, a needle threading structure is movably connected to the interior of the upper end face of the gun body, and a retainer is arranged in the front handle located at the rear end of the connector. Through the arrangement of a limiting structure, during use, the gun body and the front handle are squeezed and held, a reset spring is squeezed, then a doctor can pull a movable plate forwards through fingers, the movable plate does circular motion with a connecting rod as the circle center, and under the connecting effect of the movable plate and a positioning rod, the movable plate can move forwards and backwards; therefore, the clamping position is fixed and limited.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a rotator cuff suturing gun. Background Art

[0002] The rotator cuff is an important component of the shoulder joint. It is composed of four muscles and their attached tendons and is responsible for the stability and movement performance of the shoulder joint. Rotator cuff injury, especially rotator cuff tendon tear, is a common and serious shoulder disease. It is usually caused by trauma, overuse or aging. Once rotator cuff injury occurs, it often leads to shoulder dysfunction, pain and limited movement, seriously affecting the patient's quality of life.

[0003] Rotator cuff repair surgery is a common method for treating rotator cuff injuries. It aims to reconnect the ruptured tendon to the bone and restore its normal function. Traditional rotator cuff repair surgery usually relies on manual operation. The doctor fixes the tendon to the bone through delicate suturing. However, there are some challenges with traditional methods, including operation accuracy, operation time, and the impact of the doctor's operation experience on the operation effect. In order to improve the efficiency, accuracy and repeatability of the operation, the rotator cuff suture gun has emerged as a new type of medical device. The rotator cuff suture gun assists surgeons to accurately pass the sutures through the damaged rotator cuff tendon and bone through automation and mechanization, thereby accelerating the tendon repair process, reducing operation time, and reducing the risk of complications and errors caused by improper operation.

[0004] However, the existing rotator cuff suture guns still have some shortcomings and areas for improvement during actual use. The existing rotator cuff suture guns can only clamp and position the ruptured tendon, and threading the needle requires a professional doctor to perform another operation. A small amount can be used simultaneously but still needs to be operated in steps and cannot be achieved in one step. At the same time, the existing suture guns require the doctor's hands to exert force all the time to ensure clamping and positioning during use, which will increase the doctor's hand fatigue. Therefore, technical personnel in this field provide a rotator cuff suture gun to solve the problems raised in the above background technology. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies of the prior art, the present invention provides a rotator cuff suturing gun, which solves the problems that the prior structure can only perform simple clamping and fixing, the step-by-step operation cannot be achieved in one step, and the lack of a limit holding structure.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: A rotator cuff suturing gun, comprising a gun body and a front handle, the lower end of the front handle is movably connected to the center of the front side wall of the gun body near the lower end, the front end of the front handle is movably connected to a connector, the center of the front side wall of the connector is penetrated and connected with a gun barrel, a movable groove is provided at the center of the rear side wall of the front handle near the upper end, the movable groove penetrates the rear side wall of the front handle and passes to the interior, a needle threading structure is movably connected to the interior of the upper end surface of the gun body, a retaining frame is provided inside the front handle at the rear end of the connector, the front end of the needle threading structure sequentially penetrates the retaining frame, the connector and the gun barrel and passes to the front end, a connecting hole is provided at the center of the rear side wall of the front handle at the lower end of the movable groove, a reset spring is fixedly connected to the center of the front inner side wall of the connecting hole, the rear end of the reset spring is fixedly connected to the center of the front side wall of the gun body, a clamping structure is movably connected to the center of the front side wall of the gun body, and the front end of the clamping structure penetrates the movable groove and passes to the interior of the front handle.

[0009] Preferably, the needle threading structure includes a top block, two side walls of the top block are respectively movably connected to the two inner side walls of the upper end surface of the gun body, a metal needle tube is fixedly connected to the center of the front side wall of the top block, the front end of the metal needle tube passes through the retaining frame, the connecting head and the barrel in sequence and reaches the front end, and the end is fixedly connected to a hanging needle head, a partition frame is provided at the front edge of the inner center of the barrel, and limiting grooves are respectively provided at the centers of the upper and lower end surfaces of the partition frame, the lower end of the metal needle tube is slidably connected to the inside of the limiting groove near the upper end, the front end of the partition frame is fixedly connected to a lower clamping nozzle, a sinking groove is provided at the center of the upper end surface of the lower clamping nozzle, and the side walls of the hanging needle head at the end of the metal needle tube are slidably connected to the inside of the sinking groove.

[0010] Preferably, the clamping structure includes an arc plate, the rear end of the arc plate is movably connected to the center of the front side wall of the gun body, the front end of the arc plate passes through the movable groove and passes to the interior of the front handle, an arc groove is provided at the front side of the center of the side wall of the arc plate, and an insertion rod is slidably provided inside the arc groove, and the two ends of the insertion rod are respectively fixedly connected to the two inner side walls of the front handle, the center of the front side wall of the arc plate is fixedly connected to a hinge seat, and a turntable is rotatably connected on the inner side wall of the front handle near the front end of the hinge seat, the front end of the hinge seat is rotatably connected to a first push rod, the other end of the first push rod is rotatably connected to the center of one side wall of the turntable near the edge, the center of one side wall of the turntable near the other side edge is rotatably connected to a second push rod, the other end of the second push rod is rotatably connected to a connecting tube, the front end of the connecting tube sequentially passes through the retaining frame, the connecting head and the barrel and passes to the front end, and the end is movably connected to an upper clamping plate.

[0011] Preferably, a limiting structure is provided at the upper end of the center of one side wall of the gun body, and the limiting structure includes a movable plate, a connecting rod is provided at the lower end of the center of one side wall of the movable plate, one end of the connecting rod passes through the side wall of the movable plate and is fixedly connected to the side wall of the gun body, a positioning groove is provided at the upper edge of one side wall of the movable plate, and a positioning rod is fixedly connected at the upper end of the center of one side wall of the front handle, and the positioning rod and the positioning groove are adapted to each other.

[0012] Preferably, a grip is fixedly connected to the center of the front side wall of the front handle near the lower end.

[0013] Preferably, a sawtooth-shaped clamping groove is provided at the front edge of the center of the lower end surface of the upper clamping plate, and a spring sheet is provided at the front edge of the center of the upper end surface of the upper clamping plate.

[0014] Preferably, the edges of the front handle and the gun body are rounded.

[0015] (III) Beneficial effects

[0016] The present invention provides a rotator cuff suturing gun. It has the following beneficial effects:

[0017] 1. In the present invention, by providing a needle threading structure, when in use, by pinching the front handle and the gun body, the gun body is pushed forward under the action of the active connection between the gun body and the lower end of the front handle, and the reset spring is compressed, and the connection angle between the top block and the gun body changes, and the metal needle tube is pushed forward. The shape of the hanging needle and the metal needle tube changes under the restriction of the sinking groove on the upper end surface of the lower clamping mouth, and becomes curved, which can better pierce the patient's skin tissue. At the same time, under the action of the hanging needle, the surgical suture can be clamped and then brought to the lower end of the skin tissue, realizing synchronous operation, thereby reducing the overall suturing difficulty. As the doctor's hand releases the squeeze on the gun body, the reset spring restores the gun body and the front handle to their original state.

[0018] 2. In the present invention, by setting a clamping structure, when the doctor pushes the gun body forward during use, the connection relationship between the arc groove on the side wall of the arc plate and the insertion rod will continue to push the arc plate forward, and at the same time, the first push rod is driven upward under the action of the hinge seat, and the second push rod is pulled downward under the rotation of the turntable, thereby pulling the connecting tube backward, and at the same time, under the active connection between the connecting tube and the upper splint, the rear side of the upper splint is restricted by the front end of the gun barrel, thereby lifting the front end of the upper splint upward, which is convenient for the doctor to clamp and position the gun, and the pushing direction is consistent with the needle threading structure, but the operation direction is opposite, so that the overall operation is more convenient, achieved in one step, and also reduces the doctor's hand fatigue.

[0019] 3. In the present invention, by setting a limiting structure, when in use, the gun body and the front handle are squeezed and held, the reset spring is squeezed, and then the doctor can move the movable plate to the front side with his fingers, so that the movable plate moves in a circle with the connecting rod as the center, so that the positioning groove is clamped on the upper end of the positioning rod, and the overall limiting operation is completed under the connection between the movable plate and the positioning rod, thereby fixing and limiting the clamping position, providing convenience for the doctor's hands. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an axonometric diagram of the overall structure of the present invention;

[0021] Figure 2 It is an axonometric view of the clamping structure of the present invention when it is opened;

[0022] Figure 3 for Figure 2 The enlarged schematic diagram of point B in the middle;

[0023] Figure 4 It is a schematic diagram of the connection between the lower clamping nozzle and the upper clamping plate in the present invention;

[0024] Figure 5 It is a front view of the present invention after the front handle is opened;

[0025] Figure 6 It is an axonometric view of the upper clamping plate in the present invention;

[0026] Figure 7 It is a schematic diagram of the connection between the lower clamping nozzle and the partition frame in the present invention;

[0027] Figure 8 for Figure 1 A magnified schematic diagram of center A.

[0028] Among them, 1. front handle; 2. needle threading structure; 201. top block; 202. lower clamping nozzle; 203. metal needle tube; 204. hanging needle; 205. partition frame; 206. sinking groove; 207. limiting groove; 3. reset spring; 4. grip; 5. limit structure; 501. positioning rod; 502. movable plate; 503. connecting rod; 504. positioning groove; 6. barrel; 7. movable groove; 8. clamping structure; 801. upper clamping plate; 802. connecting tube; 803. turntable; 804. arc groove; 805. arc plate; 806. hinge seat; 807. first push rod; 808. second push rod; 809. plug rod; 9. connector; 10. retaining frame; 11. gun body; 12. connecting hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] like Figure 1-8 As shown, an embodiment of the present invention provides a rotator cuff suturing gun, including a gun body 11 and a front handle 1, wherein the lower end of the front handle 1 is movably connected to the lower end of the center of the front side wall of the gun body 11, the front end of the front handle 1 is movably connected to a connector 9, the center of the front side wall of the connector 9 is penetrated by a gun barrel 6, a movable groove 7 is provided at the upper end of the rear side wall of the front handle 1, the movable groove 7 penetrates the rear side wall of the front handle 1 and passes to the inside, the upper end surface of the gun body 11 is movably connected to a needle threading structure 2, and the front handle 2 at the rear end of the connector 9 is connected to the gun barrel 6. A retaining frame 10 is provided inside the hand 1, and the front end of the needle-threading structure 2 passes through the retaining frame 10, the connecting head 9 and the barrel 6 in sequence and reaches the front end. A connecting hole 12 is provided at the center of the rear side wall of the front handle 1 at the lower end of the movable groove 7. A reset spring 3 is fixedly connected to the center of the front inner wall of the connecting hole 12. The rear end of the reset spring 3 is fixedly connected to the center of the front side wall of the gun body 11. The center of the front side wall of the gun body 11 is movably connected with a clamping structure 8, and the front end of the clamping structure 8 passes through the movable groove 7 and reaches the inside of the front handle 1.

[0032] The needle threading structure 2 includes a top block 201, and the two side walls of the top block 201 are respectively movably connected to the two inner side walls of the upper end surface of the gun body 11, and a metal needle tube 203 is fixedly connected to the center of the front side wall of the top block 201. The front end of the metal needle tube 203 successively passes through the retaining frame 10, the connecting head 9 and the gun barrel 6 and passes to the front end, and the end is fixedly connected to a hanging needle head 204, and a partition frame 205 is arranged at the front edge of the inner center of the gun barrel 6, and limiting grooves 207 are respectively arranged at the centers of the upper and lower end surfaces of the partition frame 205. The lower end of the metal needle tube 203 is slidably connected to the inside of the limiting groove 207 near the upper end, and the front end of the partition frame 205 is fixedly connected to the lower clamping nozzle 202, and a sinking groove 206 is arranged at the center of the upper end surface of the lower clamping nozzle 202. The side wall of the hanging needle head 204 at the end of the metal needle tube 203 is provided with a The gun body 11 is slidably connected to the inside of the sinking groove 206. When in use, the front handle 1 and the gun body 11 are squeezed. Under the action of the active connection between the gun body 11 and the lower end of the front handle 1, the gun body 11 is pushed forward, and the return spring 3 is compressed. The connection angle between the top block 201 and the gun body 11 changes, and the metal needle tube 203 is pushed forward. The shape of the hanging needle 204 and the metal needle tube 203 changes under the restriction of the sinking groove 206 on the upper end surface of the lower clamping nozzle 202, and becomes curved, which can better pierce the patient's skin tissue. At the same time, under the action of the hanging needle 204, the surgical suture can be clamped and then brought to the lower end of the skin tissue, realizing synchronous operation, thereby reducing the overall suturing difficulty. As the doctor's hand releases the squeeze on the gun body 11, the return spring 3 restores the gun body 11 and the front handle 1 to their original state.

[0033] The clamping structure 8 includes an arc-shaped plate 805, the rear end of which is movably connected to the center of the front side wall of the gun body 11, the front end of the arc-shaped plate 805 passes through the movable groove 7 and passes to the inside of the front handle 1, an arc-shaped groove 804 is provided at the front side of the center of the side wall of the arc-shaped plate 805, and a plug rod 809 is slidably provided inside the arc-shaped groove 804, and the two ends of the plug rod 809 are respectively fixedly connected to the two inner side walls of the front handle 1, a hinge seat 806 is fixedly connected to the center of the front side wall of the arc-shaped plate 805, and a turntable 803 is rotatably connected to the inner side wall of the front handle 1 near the front end of the hinge seat 806, and the front end of the hinge seat 806 is rotatably connected to a first push rod 807, and the other end of the first push rod 807 is rotatably connected to the center of one side wall of the turntable 803 near the edge, and the center of one side wall of the turntable 803 is rotatably connected to a second push rod 808, and the other end of the second push rod 808 is rotatably connected to a connecting pipe 802 The front end of the connecting tube 802 passes through the retaining frame 10, the connecting head 9 and the barrel 6 in sequence and reaches the front end, and the end is movably connected with the upper splint 801. When the doctor pushes the gun body 11 forward, the connection relationship between the arc plate 805 and the arc groove 804 on the side wall and the insertion rod 809 continues to push the arc plate 805 forward. At the same time, the first push rod 807 is driven upward under the action of the hinge seat 806, and the second push rod 808 is pulled downward under the rotation of the turntable 803, thereby dragging the connecting tube 802 backward. At the same time, under the movably connected connection between the connecting tube 802 and the upper splint 801, the rear side of the upper splint 801 is restricted by the front end of the barrel 6, thereby lifting the front end of the upper splint 801 upward, which is convenient for the doctor to clamp and position the gun. By being consistent with the pushing direction of the needle threading structure 2, but in the opposite direction, the overall operation is more convenient, achieved in one step, and also reduces the doctor's hand fatigue.

[0034] A limiting structure 5 is provided at the upper end of the center of one side wall of the gun body 11, and the limiting structure 5 includes a movable plate 502, a connecting rod 503 is provided at the lower end of the center of one side wall of the movable plate 502, one end of the connecting rod 503 passes through the side wall of the movable plate 502 and is fixedly connected to the side wall of the gun body 11, a positioning groove 504 is provided at the upper edge of one side wall of the movable plate 502, and a positioning rod 501 is fixedly connected to the upper end of the center of one side wall of the front handle 1, and the positioning rod 501 and the positioning groove 504 are connected. The gun body 11 and the front handle 1 are adapted to each other. By squeezing and holding the gun body 11 and the front handle 1, the reset spring 3 is squeezed, and then the doctor can push the movable plate 502 to the front side with his fingers, so that the movable plate 502 moves in a circle with the connecting rod 503 as the center, so that the positioning groove 504 is clamped on the upper end of the positioning rod 501. Under the connection between the movable plate 502 and the positioning rod 501, the overall limiting operation is completed, thereby fixing and limiting the clamping position, providing convenience for the doctor's hands.

[0035] A grip 4 is fixedly connected to the lower center of the front side wall of the front handle 1, which is more conducive to the doctor's fingers and palms to exert force. A serrated clamping groove is provided at the front edge of the center of the lower end surface of the upper splint 801, which is convenient for cooperating with the lower clamping mouth 202 to clamp and fix the patient's skin tissue well. A spring piece is provided at the front edge of the center of the upper end surface of the upper splint 801. The spring piece is used to clamp the suture to prevent it from slipping during operation. The edges of the front handle 1 and the gun body 11 are chamfered to ensure comfort when holding.

[0036] Working principle: The present application is a rotator cuff suturing gun. When the doctor pushes the gun body 11 forward during use, the connection between the arc groove 804 on the side wall of the arc plate 805 and the insertion rod 809 pushes the arc plate 805 forward. At the same time, the first push rod 807 is driven upward under the action of the hinge seat 806, and the second push rod 808 is pulled downward under the rotation of the rotating disk 803, thereby pulling the connecting tube 802 backward. At the same time, under the active connection between the connecting tube 802 and the upper splint 801, the rear of the upper splint 801 is The side is limited by the front end of the gun barrel 6, so that the front end of the upper clamping plate 801 is lifted upward, which is convenient for the doctor to clamp and position. By being consistent with the pushing direction of the needle-threading structure 2, but the operating direction is opposite, the overall operation is more convenient, and it is achieved in one step, and it also reduces the doctor's hand fatigue. When in use, by pinching the front handle 1 and the gun body 11, the gun body 11 is pushed forward under the action of the active connection between the gun body 11 and the lower end of the front handle 1, and the reset spring 3 is compressed, and the connection angle between the top block 201 and the gun body 11 is increased. The metal needle tube 203 is pushed forward, and the shape of the thread hanging needle 204 and the metal needle tube 203 changes under the restriction of the sinking groove 206 on the upper end surface of the lower clamping nozzle 202, and becomes curved, which can better pierce the patient's skin tissue. At the same time, the surgical suture can be clamped under the action of the thread hanging needle 204 and then brought to the lower end of the skin tissue, realizing synchronous operation, thereby reducing the overall suture difficulty. As the doctor's hand releases the squeeze on the gun body 11, the reset spring 3 restores the gun body 11 and the front handle 1 to their original state. When it is necessary to maintain the clamping and fixing state, the gun body 11 and the front handle 1 are squeezed and held, and the reset spring 3 is squeezed. Then the doctor can push the movable plate 502 to the front side with his fingers, so that the movable plate 502 moves in a circle with the connecting rod 503 as the center, so that the positioning groove 504 is clamped on the upper end of the positioning rod 501. Under the connection between the movable plate 502 and the positioning rod 501, the overall limiting operation is completed, thereby fixing and limiting the clamping position, providing convenience for the doctor's hands.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotator cuff suturing gun, comprising a gun body (11) and a front handle (1), wherein the lower end of the front handle (1) is movably connected to the center of the front side wall of the gun body (11) near the lower end, characterized in that: The front end of the front handle (1) is movably connected to a connector (9), a gun barrel (6) is connected to the center of the front side wall of the connector (9), a movable groove (7) is provided at the center of the upper end of the rear side wall of the front handle (1), the movable groove (7) penetrates the rear side wall of the front handle (1) and leads to the interior, the upper end surface of the gun body (11) is movably connected to a needle threading structure (2), a retaining frame (10) is provided inside the front handle (1) at the rear end of the connector (9), and the front end of the needle threading structure (2) penetrates the retaining frame (10) in sequence. The frame (10), the connector (9) and the gun barrel (6) are connected to the front end, and a connecting hole (12) is provided at the center of the rear side wall of the front handle (1) at the lower end of the movable groove (7). A reset spring (3) is fixedly connected at the center of the front inner wall of the connecting hole (12). The rear end of the reset spring (3) is fixedly connected to the center of the front side wall of the gun body (11). The center of the front side wall of the gun body (11) is movably connected to a clamping structure (8). The front end of the clamping structure (8) passes through the movable groove (7) and is connected to the interior of the front handle (1).

2. A rotator cuff suturing gun according to claim 1, characterized in that: The needle threading structure (2) comprises a top block (201), the two side walls of the top block (201) are respectively movably connected to the two inner side walls of the upper end surface of the gun body (11), a metal needle tube (203) is fixedly connected at the center of the front side wall of the top block (201), the front end of the metal needle tube (203) passes through the retaining frame (10), the connecting head (9) and the gun barrel (6) in sequence and passes to the front end, and the end is fixedly connected to the hanging needle head (204), and a partition frame (203) is arranged at the inner center of the gun barrel (6) near the front side edge. 205), the centers of the upper and lower end surfaces of the partition frame (205) are respectively provided with limiting grooves (207), the lower end of the metal needle tube (203) is slidably connected to the inside of the limiting groove (207) near the upper end, the front end of the partition frame (205) is fixedly connected to the lower clamping nozzle (202), the center of the upper end surface of the lower clamping nozzle (202) is provided with a sinking groove (206), and the side wall of the hanging needle (204) at the end of the metal needle tube (203) is slidably connected to the inside of the sinking groove (206).

3. A rotator cuff suturing gun according to claim 1, characterized in that: The clamping structure (8) comprises an arc-shaped plate (805), the rear end of which is movably connected to the center of the front side wall of the gun body (11), the front end of which passes through the movable groove (7) and leads to the interior of the front handle (1), an arc-shaped groove (804) is provided at the front side of the center of the side wall of the arc-shaped plate (805), a plug rod (809) is slidably provided inside the arc-shaped groove (804), the two ends of which are fixedly connected to the two inner side walls of the front handle (1), and a hinge seat (806) is fixedly connected to the center of the front side wall of the arc-shaped plate (805), and a hinge seat (806) is provided near the front end of the hinge seat (806). A turntable (803) is rotatably connected to the inner wall of the front handle (1), a first push rod (807) is rotatably connected to the front end of the hinge seat (806), the other end of the first push rod (807) is rotatably connected to the center of one side wall of the turntable (803) close to the edge, a second push rod (808) is rotatably connected to the center of one side wall of the turntable (803) close to the edge of the other side, the other end of the second push rod (808) is rotatably connected to a connecting tube (802), the front end of the connecting tube (802) passes through the retaining frame (10), the connecting head (9) and the gun barrel (6) in sequence and passes to the front end, and the end is movably connected to an upper clamping plate (801).

4. The rotator cuff suturing gun according to claim 1, characterized in that: A limiting structure (5) is provided at the upper end of the center of one side wall of the gun body (11), and the limiting structure (5) comprises a movable plate (502). A connecting rod (503) is provided at the lower end of the center of one side wall of the movable plate (502), one end of the connecting rod (503) penetrates the side wall of the movable plate (502) and is fixedly connected to the side wall of the gun body (11). A positioning groove (504) is provided at the upper end edge of one side wall of the movable plate (502), and a positioning rod (501) is fixedly connected at the upper end of the center of one side wall of the front handle (1), and the positioning rod (501) and the positioning groove (504) are adapted to each other.

5. The rotator cuff suturing gun according to claim 1, characterized in that: A grip (4) is fixedly connected to the lower end of the center of the front side wall of the front handle (1).

6. The rotator cuff suturing gun according to claim 3, characterized in that: A sawtooth-shaped clamping groove is provided at the front edge of the center of the lower end surface of the upper clamping plate (801), and a spring sheet is provided at the front edge of the center of the upper end surface of the upper clamping plate (801).

7. The rotator cuff suturing gun according to claim 1, characterized in that: The edges of the front handle (1) and the gun body (11) are both rounded.

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