Biopsy gun with double firing buttons and self-locking function

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a biopsy gun with double firing buttons and a self-locking function, which comprises a shell and a needle tube assembly, an inner core needle, a cutting tube and an outer sleeve are coaxially nested from inside to outside, and a pushing piece, a cutting needle tube fixing piece, an elastic assembly and the firing buttons are arranged inside and outside the shell. The cutting tube and the outer sleeve are fixedly connected with the cutting needle tube fixing part and elastically connected with the bottom of the near end of the shell through the elastic assembly, the pushing part is arranged on the outer side of the cutting needle tube fixing part and can drive the cutting needle tube fixing part to move towards the near end and compress the elastic assembly to enable the device to be in a winding state, and the excitation button is arranged on the end face of the near end of the shell. The excitation button is used for exciting the cutting needle tube fixing piece to emit, and the pushing piece is connected with the excitation button and can also excite the cutting needle tube fixing piece to emit. The percussion button is additionally arranged on the end face of the near end of the shell, limitation of the angle of a biopsy gun is avoided, operation of an operator is facilitated, and different biopsy operation requirements can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, especially relates to a biopsy gun with double trigger buttons and self-locking function. BACKGROUND

[0002] Puncture biopsy is the main way to obtain pathological diagnosis. Biopsy gun, also known as biopsy needle, is a commonly used device for puncture biopsy, mainly used for puncture sampling. It mainly includes an inner core needle, a cutting tube, an outer sleeve and a handle assembly. The inner core needle, the cutting tube and the outer sleeve are coaxially nested from inside to outside. The handle assembly has a trigger device inside for triggering the cutting tube and the outer sleeve to extend out of the front end of the inner core needle to cut tissues. The existing trigger device only has one trigger button. For biopsy of different body positions, the operator needs to adjust his position and gestures to adapt to the button. In addition, although the existing biopsy gun sets a stop component for the trigger button to prevent accidental triggering of the trigger button, the existing stop component needs to be manually locked. When the operator forgets to lock it, there is still a risk of accidental triggering. SUMMARY

[0003] The utility model aims at providing a biopsy gun with double trigger buttons and self-locking function to solve the above technical problems.

[0004] To achieve the above purpose, the specific technical scheme of the utility model of a biopsy gun with double trigger buttons and self-locking function is as follows:

[0005] A biopsy gun with double trigger buttons and self-locking function, comprising a shell and a needle tube assembly, the proximal end of the needle tube assembly is connected with the shell, and the distal end is a free end. The needle tube assembly includes an inner core needle, a cutting tube and an outer sleeve. The inner core needle, the cutting tube and the outer sleeve are coaxially nested from inside to outside. The proximal end of the inner core needle is fixedly installed at the bottom of the proximal end of the shell. The shell is provided with a pusher, a cutting needle tube fixing piece, an elastic assembly and a trigger button inside and outside. The cutting tube and the outer sleeve are fixedly connected with the cutting needle tube fixing piece and are elastically connected with the bottom of the proximal end of the shell through the elastic assembly. The pusher is arranged outside the cutting needle tube fixing piece and can drive the cutting needle tube fixing piece to move towards the proximal end, compress the elastic assembly and make the device in the upper string state. The trigger button is arranged on the end face of the proximal end of the shell. The trigger button is used to trigger the cutting needle tube fixing piece to shoot. The pusher is connected with the trigger button and can also trigger the cutting needle tube fixing piece to shoot.

[0006] Further, the cutting needle tube fixing piece includes a fixing piece body. The fixing piece body has a through hole inside for fixing the cutting tube and the outer sleeve. The proximal end of the outer sleeve is fixedly installed at the distal end of the fixing piece body. The proximal end of the cutting tube is fixedly installed in the middle of the fixing piece body. The proximal end of the fixing piece body has an inverted hook part. The inner wall of the shell has a positioning column.

[0007] Further, the elastic assembly comprises a spring seat and a spring, one end of the spring is fixedly installed on the spring seat, and one end is fixedly connected with the proximal end of the shell, the distal end of the spring seat is in abutment with the proximal end center of the body of the fixing part under the action of spring elasticity, when the cutting needle tube fixing part moves towards the proximal end, the spring is compressed, and the barb part hooks the positioning column on the inner wall of the shell to enter the upper string state.

[0008] Further, the pushing part comprises a pushing part body and a pushing button, the pushing part body is arranged inside the shell, the pushing button is arranged on one side of the shell and is fixedly connected with the pushing part body, the proximal end inside of the pushing part body is provided with a proximal end pushing claw, and the distal end inside of the pushing part body is provided with a distal end pushing claw, the distal end pushing claw is in abutment with the outer end surface of the body of the cutting needle tube fixing part, and under the pushing of the pushing button, the distal end pushing claw can drive the cutting needle tube fixing part to move towards the proximal end to complete the upper string action, and the proximal end pushing claw is in abutment with the trigger button and is used to drive the trigger button to act.

[0009] Further, the trigger button comprises a trigger key, a trigger and an elastic structure, the trigger key is arranged on the proximal end surface of the shell, the trigger is arranged inside the shell and is fixedly connected with the trigger key, the distal end of the trigger is provided with a trigger inclined surface, the rear side of the trigger inclined surface is formed in a barb shape, when the trigger key is pressed, the trigger moves towards the distal end, the trigger inclined surface is in contact with the inclined surface of the barb part of the cutting needle tube fixing part, the barb part is pushed to open outward to separate from the positioning column and enter the launching state.

[0010] Further, the rear side of the trigger inclined surface is formed in a barb shape and can be in abutment with the proximal end pushing claw of the pushing part, when the trigger key is stationary, the pushing part is pushed towards the proximal end, and the proximal end pushing claw of the pushing part drives the trigger to move towards the distal end.

[0011] Further, a sliding groove is arranged on the shell, a locking button is arranged in the sliding groove, the locking button comprises a push knob exposed on the surface of the shell and a stopper arranged inside the shell, the outer side of the trigger is provided with a step part, when the push knob of the locking button is pushed, the stopper can be clamped into the step part to limit the movement of the trigger button.

[0012] Further, a push plate is further arranged between the push knob of the locking button and the connecting part of the stopper, the proximal end of the pushing part is further provided with a guide block, the guide block has an inclination, during the upper string process, the pushing part is pushed towards the proximal end, the guide block can push the push plate of the locking button to make the locking button rotate, the stopper is clamped into the step part of the trigger, and automatic locking is realized.

[0013] The biopsy gun with the double-clicking trigger button and the self-locking function has the following advantages: besides the pushing member, the biopsy gun of the utility model increases a trigger button on the proximal end face of the shell, is not limited by the angle of the biopsy gun, is convenient for the operator to operate, and can adapt to the needs of different biopsy methods; the pushing member is provided with a guide block, can automatically lock the locking button in the process of cocking, and avoids the misfiring caused by the operator forgetting to slide the rotating member. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the biopsy gun of the utility model;

[0015] Figure 2 It is a sectional structure schematic view of the biopsy gun of the utility model;

[0016] Figure 3 It is a sectional structure schematic view of the inside of the shell of the biopsy gun of the utility model;

[0017] Figure 4 It is a structure sectional view of the cocking state of the biopsy gun of the utility model;

[0018] Figure 5 It is a structure schematic view of the trigger button of the utility model;

[0019] Figure 6 It is a top view structure schematic view of the pushing member of the utility model;

[0020] Figure 7 It is a bottom view structure schematic view of the pushing member of the utility model;

[0021] Figure 8 It is a perspective view of the locking button of the utility model;

[0022] Figure 9 It is a sectional view of the locking button of the utility model;

[0023] Figure 10 It is a structure schematic view of the automatic locking structure of the utility model;

[0024] Figure 11 It is a structure schematic view of the locking state of the utility model;

[0025] Figure 12 It is a structure schematic view of the unlocking state of the utility model;

[0026] The markings in the diagram are as follows: 1. Housing; 2. Needle assembly; 11. Inner core needle; 12. Cutting tube; 13. Outer tube; 14. Positioning post; 3. Pushing component; 31. Pushing component body; 311. Proximal pusher; 312. Distal pusher; 32. Push button; 33. Guide block; 4. Cutting needle tube fixing component; 41. Fixing component body; 42. Barb; 5. Elastic component; 51. Spring seat; 52. Spring; 6. Activation button; 61. Activation key; 62. Activator; 621. Activation ramp; 622. Step; 63. Elastic structure; 7. Locking button; 71. Push button; 72. Stop block; 73. Push plate. Detailed Implementation

[0027] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a biopsy gun with a double-click firing button and a self-locking function.

[0028] To better illustrate the structure and working principle of this utility model, the end closer to the operator is defined as the proximal end, and the end farther from the operator is defined as the distal end.

[0029] like Figures 1-4 As shown, this utility model discloses a biopsy gun with a double-click firing button and a self-locking function, comprising a housing 1 and a needle assembly 2. The housing 1 is internally and externally equipped with a pusher 3, a cutting needle fixing member 4, an elastic component 5, and an activation button 6. The proximal end of the needle assembly 2 is connected to the housing 1, and the distal end is a free end. The needle assembly 2 includes an inner core needle 11, a cutting tube 12, and an outer tube 13, which are coaxially nested from the inside out. The proximal end of the inner core needle 11 is fixedly installed at the bottom proximal end of the housing 1. The cutting tube 12 and the outer tube 13 are fixedly connected to the cutting needle fixing member 4 and elastically connected to the bottom proximal end of the housing 1 through the elastic component 5. The pusher 3 is located outside the cutting needle fixing member 4 and can drive the cutting needle fixing member 4 to move proximally, compressing the elastic component 5 and putting the device in a cocked state. The activation button 6 is located on the end face of the proximal end of the housing 1 and is used to activate the cutting needle fixing member 4. The pusher 3 is connected to the activation button 6 and can also activate the cutting needle fixing member 4.

[0030] The cutting needle tube fixing component 4 includes a fixing component body 41, which has a through hole for fixing the cutting tube 12 and the outer tube 13. The proximal end of the outer tube 13 is fixedly installed at the distal end of the fixing component body 41, and the proximal end of the cutting tube 12 is fixedly installed in the middle of the fixing component body 41. The proximal end of the fixing component body 41 has a barb portion 42, and the inner wall of the housing 1 has a positioning post 14.

[0031] The elastic assembly 5 comprises a spring seat 51 and a spring 52, one end of the spring 52 is fixedly installed on the spring seat 51, one end is fixedly connected with the proximal end of the shell 1, and the distal end of the spring seat 51 is in abutment with the proximal end center of the fixed part body 41 under the elastic force of the spring 52. When the cutting needle tube fixing part 4 moves towards the proximal end, the spring 52 is compressed, the barb part 42 hooks the positioning column 14 on the inner wall of the shell 1, and enters the upper bow state.

[0032] As shown in Figure 6 Figure 7 The pushing member 3 comprises a pushing member body 31 and a pushing button 32, the pushing member body 31 is arranged inside the shell 1, the pushing button 32 is arranged on one side of the shell 1 and is fixedly connected with the pushing member body 31, the proximal end inner side of the pushing member body 31 has a proximal end pushing claw 311, and the distal end inner side has a distal end pushing claw 312, the distal end pushing claw 312 is in abutment with the outer end face of the fixed part body 41 of the cutting needle tube fixing part 4, and under the pushing of the pushing button 32, the distal end pushing claw 312 can be used to drive the cutting needle tube fixing part 4 to move towards the proximal end, and the upper bow action is completed. The proximal end pushing claw 311 is in abutment with the trigger button 6, and is used to drive the trigger button 6 to act.

[0033] As shown in Figure 5 The trigger button 6 comprises a trigger key 61, a trigger 62 and an elastic structure 63, the trigger key 61 is arranged on the proximal end face of the shell 1, facilitating the trigger operation of the operator at different angles. The trigger 62 is arranged in the shell 1 and is fixedly connected with the trigger key 61, the distal end of the trigger 62 has a trigger inclined surface 621, the rear side of the trigger inclined surface 621 is formed in a barb shape, when the trigger key 61 is pressed, the trigger 62 moves towards the distal end, the trigger inclined surface 621 is in contact with the inclined surface of the barb part 42 of the cutting needle tube fixing part 4, the barb part 42 is pushed to open outward, is separated from the positioning column 14, and enters the launching state. The rear side of the trigger inclined surface 621 is formed in a barb shape and can be in abutment with the proximal end pushing claw 311 of the pushing member 3. When the trigger key 61 is stationary, the pushing member 3 is pushed towards the proximal end, the proximal end pushing claw 311 of the pushing member 3 drives the trigger 62 to move towards the distal end, the trigger inclined surface 621 is in contact with the inclined surface of the barb part 42 of the cutting needle tube fixing part 4, the barb part 42 is pushed to open outward, is separated from the positioning column 14, and can also trigger the cutting needle tube fixing part 4, realizing the double-click trigger function.

[0034] As shown in Figures 8-12 In order to prevent mis-triggering, a sliding groove is arranged on the shell 1, a locking button 7 is arranged in the sliding groove, the locking button 7 comprises a push button 71 exposed on the surface of the shell 1 and a stop block 72 arranged in the shell 1, the outer side of the trigger 62 has a step part 622, when the push button 71 of the locking button 7 is pushed, the stop block 72 can be clamped into the step part 622, and the movement of the trigger button 6 is limited. The locking function is realized.

[0035] In order to prevent the operator from forgetting to lock, resulting in the occurrence of misfiring, the push-torsion 71 of the locking button 7 and the connecting part of the blocking block 72 are further provided with a push plate 73, and the proximal end of the pusher 3 is further provided with a guide block 33, which has an inclination. During the process of cocking, the pusher 3 pushes towards the proximal end, and the guide block 33 can push the push plate 73 of the locking button 7, so that the locking button 7 rotates, the blocking block 72 is clamped into the stepped portion 622 of the trigger 62, and automatic locking is realized. Misfiring due to forgetting to lock will not occur. When unlocking, the locking button 7 is pushed to open the guide block 33, and unlocking can be realized.

[0036] Use process:

[0037] Cocking: pulling the pusher 3 towards the proximal end, the distal end of the pusher 3 drives the cutting needle tube fixing part 4 to move together until the barb portion 42 of the cutting needle tube fixing part 4 hooks the positioning column 14 in the shell 1, and the cocking is completed.

[0038] Firing mode one: pressing the trigger button 6, the trigger 62 of the trigger button 6 contacts the barb portion 42 of the cutting needle tube fixing part 4, opens the barb portion 42, and releases the connection between the barb portion 42 and the positioning column 14 of the shell 1, and the cutting needle tube fixing part 4 is emitted towards the distal end under the action of the elastic assembly 5.

[0039] Firing mode two: pushing the pusher 3 towards the distal end, the proximal end of the pusher 3 drives the trigger 62 of the trigger button 6 to move towards the distal end, contacts the barb portion 42 of the cutting needle tube fixing part 4, opens the barb portion 42, and releases the connection between the barb portion 42 and the positioning column 14 of the shell 1, and the cutting needle tube fixing part 4 is emitted towards the distal end under the action of the elastic assembly 5.

[0040] Automatic locking of the locking button 7: during the process of cocking, when the pusher 3 is pulled towards the proximal end, the guide block 33 of the pusher 3 contacts the push plate 73 of the locking button 7 and pushes the locking button 7 to rotate, and the angle of rotation of the locking button 7 can make the blocking block 72 of the locking button 7 block the trigger button 6, preventing the trigger button 6 from being pressed down.

[0041] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.

Claims

1. A biopsy gun with double trigger button and self-locking function, comprising a shell (1) and a needle tube assembly (2), the proximal end of the needle tube assembly (2) is connected with the shell (1), and the distal end is a free end, the needle tube assembly (2) comprises an inner core needle (11), a cutting tube (12) and an outer sleeve (13), the inner core needle (11), the cutting tube (12) and the outer sleeve (13) are coaxially nested from inside to outside, and the proximal end of the inner core needle (11) is fixedly installed at the bottom of the proximal end of the shell (1), characterized in that, The shell (1) is provided with a pusher (3), a cutting needle tube fixing part (4), an elastic assembly (5) and a trigger button (6) inside and outside, the cutting tube (12) and the sleeve tube (13) are fixedly connected with the cutting needle tube fixing part (4), and are elastically connected with the proximal end bottom of the shell (1) through the elastic assembly (5), the pusher (3) is arranged outside the cutting needle tube fixing part (4) and can drive the cutting needle tube fixing part (4) to move towards the proximal end, compress the elastic assembly (5), and make the device be in the upper string state, the trigger button (6) is arranged on the end face of the proximal end of the shell (1), the trigger button (6) is used for triggering the cutting needle tube fixing part (4) to be launched, and the pusher (3) is connected with the trigger button (6) and can also trigger the cutting needle tube fixing part (4) to be launched.

2. The biopsy gun with dual cocking button and self-locking function according to claim 1, characterized in that, The cutting needle tube fixing part (4) comprises a fixing part body (41), the fixing part body (41) has a through hole inside, for fixing the cutting tube (12) and the sleeve tube (13), the sleeve tube (13) is fixedly installed at the distal end of the fixing part body (41), the cutting tube (12) is fixedly installed at the middle of the fixing part body (41), the fixing part body (41) has an inverted hook part (42) at the proximal end, and the inner wall of the shell (1) has a positioning column (14).

3. The biopsy gun with dual cocking button and self-locking function according to claim 2, characterized in that, The elastic assembly (5) comprises a spring seat (51) and a spring (52), one end of the spring (52) is fixedly installed on the spring seat (51), and the other end is fixedly connected with the proximal end of the shell (1), the spring seat (51) is in abutment with the proximal end center of the fixing part body (41) under the action of the elasticity of the spring (52), when the cutting needle tube fixing part (4) moves towards the proximal end, the spring (52) is compressed, and the inverted hook part (42) hooks the positioning column (14) of the inner wall of the shell (1) and enters the upper string state.

4. The biopsy gun with dual cocking button and self-locking function according to claim 2, characterized in that, The pusher (3) comprises a pusher body (31) and a push button (32), the pusher body (31) is arranged inside the shell (1), the push button (32) is arranged on one side of the shell (1) and is fixedly connected with the pusher body (31), the proximal end inner side of the pusher body (31) has a proximal end push claw (311), and the distal end inner side has a distal end push claw (312), the distal end push claw (312) is in abutment with the outer end face of the fixing part body (41) of the cutting needle tube fixing part (4), can be used for driving the cutting needle tube fixing part (4) to move towards the proximal end under the pushing of the push button (32), and completes the upper string action, and the proximal end push claw (311) is in abutment with the trigger button (6) and is used for driving the trigger button (6) to act.

5. The biopsy gun with dual cocking button and self-locking function according to claim 2, wherein, The trigger button (6) comprises a trigger key (61), a trigger (62) and an elastic structure (63), the trigger key (61) is arranged at the proximal end face of the shell (1), the trigger (62) is arranged in the shell (1) and is fixedly connected with the trigger key (61), the distal end of the trigger (62) is provided with a trigger inclined surface (621), the rear side of the trigger inclined surface (621) is formed in a barb shape, when the trigger key (61) is pressed, the trigger (62) moves towards the distal end, the trigger inclined surface (621) is in contact with the inclined surface of the barb part (42) of the cutting needle tube fixing part (4), the barb part (42) is pushed to open outward, is separated from the positioning column (14) and enters the launching state.

6. The biopsy gun with dual cocking button and self-locking function according to claim 5, characterized in that, The rear side of the trigger inclined surface (621) is formed in a barb shape and can be in abutment with the proximal end pushing claw (311) of the pushing member (3), when the trigger key (61) is not moved, the pushing member (3) is pushed towards the proximal end, and the proximal end pushing claw (311) of the pushing member (3) drives the trigger (62) to move towards the distal end.

7. The biopsy gun with dual cocking button and self-locking function according to claim 5, characterized in that, The shell (1) is provided with a sliding groove, the sliding groove is provided with a locking button (7), the locking button (7) comprises a push button (71) exposed on the surface of the shell (1) and a stop block (72) arranged in the shell (1), the outer side of the trigger (62) is provided with a step part (622), when the push button (71) of the locking button (7) is pushed, the stop block (72) can be clamped into the step part (622), and the movement of the trigger button (6) is limited.

8. The biopsy gun with dual cocking button and self-locking function according to claim 7, characterized in that, The push plate (73) is further arranged between the push button (71) of the locking button (7) and the connecting part of the stop block (72), the proximal end of the pushing member (3) is further provided with a guide block (33), the guide block (33) has an inclination, during the process of being pulled towards the proximal end, the pushing member (3) is pushed towards the proximal end, the guide block (33) can push the push plate (73) of the locking button (7), the locking button (7) is rotated, the stop block (72) is clamped into the step part (622) of the trigger (62), and automatic locking is realized.

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