CN219000377U

CN219000377U - Key protection device and biopsy needle adopting same

Info

Publication number: CN219000377U
Application number: CN202223345792.5U
Authority: CN
Inventors: 曾庆源; 曾俊华
Original assignee: Jingfang Precision Medical Device Shenzhen Co ltd
Current assignee: Jingfang Precision Medical Device Shenzhen Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-12
Anticipated expiration: 2032-12-12

Abstract

The application relates to a key guard and a biopsy needle employing the same. The key protection device comprises mounting through holes which penetrate through two opposite sides of the shell along the direction perpendicular to the key moving direction, and the mounting through holes are positioned in front of the keys in the key moving direction; the key protection device further comprises a safety lock which is slidably inserted into the installation through hole, the safety lock is provided with a first limiting position and a second limiting position along the installation through hole, the rear side of the safety lock in the key moving direction is provided with at least one limiting structure corresponding to the at least one key, the at least one limiting structure prevents the at least one key from moving when the safety lock is located at the first limiting position, and the at least one limiting structure avoids the at least one key from moving when the safety lock is located at the second limiting position. The button protector of this application effectively prevents the mistake to the button and touches, both convenient operation has improved biopsy needle's security again.

Description

Key protection device and biopsy needle adopting same

Technical Field

The present application relates to medical devices, and more particularly, to a key guard and biopsy needle employing the same.

Background

The ultrasonic guided puncture sampling of focal cells or tissues is a common means for pathological analysis and diagnosis. One very important tool for puncture sampling is a biopsy needle. The biopsy needle mainly comprises a shell, an outer needle assembly, an inner needle assembly, a loading key and an excitation assembly, and the working principle is that the outer needle assembly and the inner needle assembly move in the shell, the loading key elastically loads the inner needle assembly and the outer needle assembly, and then the excitation key of the excitation assembly is pressed, so that the inner needle assembly and the outer needle assembly are released from a loading state and are instantaneously excited to human body sampling. If the biopsy needle is mistakenly triggered by touching the trigger button in the using process, the biopsy needle can be mistakenly triggered, and the medical staff or the patient can be injured.

Currently, biopsy needles on the market have two types, namely a single-excitation key and a double-excitation key. Biopsy needles employing single actuation buttons generally have a surrounding flange around the actuation button to prevent false touches and reduce potential safety hazards during needle sticks with hand-held biopsy needles. Because the layout space of the keys is smaller, the surrounding barriers are arranged on the periphery of the two keys, the finger pressing area is limited and is not beneficial to excitation operation, if the keys are in an exposed state, the operation process of conveniently pressing but holding the biopsy needle in place before loading or puncturing is easy to touch by mistake, and a safety protection device is required to be arranged to solve the risk.

Disclosure of Invention

The technical problem that this application was to solve lies in, to the above-mentioned excitation button of biopsy needle of prior art easily by the defect of mistake touch, provides a button protector and adopts this button protector's biopsy needle.

In order to solve the technical problem, the first aspect provides a key protection device for locking and unlocking a key moving in a housing, wherein the key comprises at least one key which is arranged side by side and moves in the same direction, the key protection device comprises mounting through holes which are formed through two opposite sides of the housing along a direction perpendicular to the moving direction of the key, and the mounting through holes are positioned in front of the key in the moving direction of the key; the key protection device further comprises a safety lock which is slidably inserted into the installation through hole, the safety lock is provided with a first limiting position and a second limiting position along the installation through hole, the rear side of the safety lock in the key moving direction is provided with at least one limiting structure corresponding to the at least one key, the at least one limiting structure prevents the at least one key from moving when the safety lock is located at the first limiting position, and the at least one limiting structure avoids the at least one key from moving when the safety lock is located at the second limiting position.

In an embodiment of the key protection device according to the first aspect of the present application, the safety lock is provided with at least one limit bump extending towards the at least one key in a key movement direction corresponding to the at least one key; the safety lock is characterized in that when the safety lock is in a first limiting position, the at least one limiting lug is abutted with a limiting surface correspondingly arranged on the at least one key to limit the movement of the key, and when the safety lock is in a second limiting position, the at least one limiting lug is opposite to a through hole correspondingly arranged on the at least one key to penetrate through so as to avoid the movement of the key.

According to an embodiment of the key protection device of the first aspect of the present application, the safety lock is configured to achieve the first limit position and the second limit position in the housing by means of a resilient buckle engaged with two clamping grooves distributed along the moving direction of the safety lock.

According to an embodiment of the key protection device of the first aspect of the present application, a first clamping groove and a second clamping groove which vertically extend are formed on the front side of the safety lock in the key moving direction and correspond to the first limiting position and the second limiting position; the shell is internally provided with a support arm extending downwards from the top or upwards from the bottom, and a buckling position which is buckled into the first clamping groove when at a first limiting position and buckled into the second clamping groove when at a second limiting position is formed on the support arm.

According to an embodiment of the key protection device of the first aspect of the present application, the first clamping groove and the second clamping groove are V-shaped grooves, and the buckling position is a V-shaped buckling position.

According to one embodiment of the key guard of the first aspect of the present application, the safety lock has a first end and a second end opposite to the first end, and when the safety lock moves to the first limit position in the installation through hole, the first end of the safety lock is exposed out of one side of the housing from the installation through hole, and the second end of the safety lock is received in the installation through hole; when the safety lock moves to the second limiting position in the mounting through hole, the second end of the safety lock is exposed out of the other side of the shell from the mounting through hole, and the first end of the safety lock is retracted into the mounting through hole.

According to an embodiment of the key protection device of the first aspect of the present application, the safety lock is provided with a locking identifier at the periphery of the first end, and is provided with an unlocking identifier at the periphery of the second end.

According to one embodiment of the key protection device of the first aspect of the application, a first limiting stop edge is formed at the first end of the safety lock, a second limiting stop edge is formed at the second end of the safety lock, and limiting steps are formed on the outer surfaces of two sides of the shell around the mounting through hole respectively; when the safety lock moves to the first limiting position in the mounting through hole, the second limiting blocking edge is abutted with the limiting step on the corresponding side of the shell, and when the safety lock moves to the second limiting position in the mounting through hole, the first limiting blocking edge is abutted with the limiting step on the corresponding side of the shell.

This application proposes a biopsy needle in the second aspect for solving its technical problem, including casing, outer needle subassembly, interior needle subassembly, loading subassembly and excitation subassembly, outer needle subassembly and interior needle subassembly along with advance the parallel direction activity of needle direction set up in the casing, loading subassembly drive interior needle subassembly and outer needle subassembly elastic loading is put in place, excitation subassembly is through the spacing in order to make interior needle subassembly and outer needle subassembly by elastic excitation of the loading of interior needle subassembly and outer needle subassembly of excitation button release, the biopsy needle still sets up as aforementioned button protector locking and unblock the removal of excitation button in the casing.

In one embodiment of the biopsy needle according to the second aspect of the present application, the excitation assembly comprises a first excitation assembly and a second excitation assembly, which act on the inner needle assembly and the outer needle assembly by movement of a first excitation key and a second excitation key arranged side by side within the housing, respectively; the safety lock of the key protection device is provided with a first limiting structure and a second limiting structure corresponding to the first excitation key and the second excitation key respectively, the first limiting structure and the second limiting structure respectively prevent the first excitation key and the second excitation from moving when the safety lock is positioned at a first limiting position, and the first limiting structure and the second limiting structure respectively avoid the first excitation key and the second excitation from moving when the safety lock is positioned at a second limiting position.

Implement this application's button protector and adopt this button protector's biopsy needle, have following beneficial effect: according to the key protection device, the key is locked and unlocked in the shell through moving and switching between the first limiting position and the second limiting position in the installation through hole through the safety lock, and false touch of the key is effectively prevented. According to the biopsy needle disclosed by the embodiment of the application, the key protection device is used for locking and unlocking the movement of the excitation key in the shell, and even if the excitation key is touched by mistake under the locking state, the false excitation of the inner needle and the outer needle can not be caused, so that the operation is convenient, and the safety of the biopsy needle is improved.

Drawings

The application will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of a biopsy needle according to one embodiment of the present application in a locked configuration;

FIG. 2 is a schematic view of the biopsy needle of FIG. 1 in an unlocked state;

FIG. 3 is an exploded view of the biopsy needle shown in FIG. 1;

FIG. 4 is a schematic view of the safety lock in the biopsy needle shown in FIG. 3;

FIG. 5 is a schematic view of another angle configuration of the security lock shown in FIG. 4;

FIG. 6 is a schematic view of a partial structure of the upper cover of the biopsy needle of FIG. 3 at another angle;

FIG. 7 is a schematic plan view of the assembled safety lock and upper cover of FIG. 4;

FIG. 8 is a schematic view of the safety lock and base assembly of FIG. 4 in a locked condition;

FIG. 9 is a schematic view of the safety lock and base assembly of FIG. 8 in an unlocked state;

fig. 10 is a schematic plan view of the structure of the safety lock and the base assembly in fig. 9 in an unlocked state, in which the actuation key is pressed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. Moreover, embodiments and features of embodiments in this application may be combined with each other without conflict.

Referring to fig. 1, 2 and 3, a biopsy needle 100 according to one embodiment of the present application is generally comprised of a housing 10, an outer needle assembly 20, an inner needle assembly 30, a loading assembly 40, a first firing assembly 50, a second firing assembly 60, and a key guard. The housing 10 is surrounded by an inner space by the upper cover 11 and the base 12 combined by the cooperating snap-fit positioning structures, and the inner needle assembly 30 and the outer needle assembly 20 are mounted in the housing 10 in a reciprocatingly slidable and spring-loaded manner in a direction parallel to the needle insertion direction, respectively. The loading assembly 40 is slidably provided on the upper cover 11 in a direction parallel to the needle insertion direction for applying a force for rearward movement to the outer needle assembly 20 and the inner needle assembly 30 to place the outer needle assembly 20 and the inner needle assembly 30 in a loaded state. The first firing assembly 50 is configured to be fired by acting on the inner needle assembly 30 to unlatch the inner needle assembly 30, the second firing assembly 60 is configured to be fired by acting on the outer needle assembly 20 to unlatch the outer needle assembly 20, and the second firing assembly 60 is further configured to be fired by acting on the inner needle assembly 30 when the inner needle assembly 30 is not being fired to unlatch the inner needle assembly 30. The first excitation component 50 is provided with a first excitation key 51, the second excitation component 60 is provided with a second excitation key 61, the first excitation component 51 and the second excitation key 61 are respectively arranged at the rear end of the shell 10 in the needle inserting direction, and the first excitation component 50 and the second excitation component 60 can act on the inner needle component 30 and the outer needle component 20 respectively to excite the inner needle component 30 and the outer needle component 20 by pressing the first excitation key 51 and/or the second excitation key 61. The biopsy needle 100 according to the above embodiments of the present application can realize multiple usage modes by matching the loading assembly 40 with the first excitation assembly 50 and the second excitation assembly 60, so that a doctor can select the most suitable excitation mode according to different situations when using the biopsy needle, and the most timely and most suitable biopsy scheme is provided for a patient. The specific implementation of outer needle assembly 20, inner needle assembly 30, loading assembly 40, first excitation assembly 50 and second excitation assembly 60 is known in the art, and is disclosed in, for example, chinese patent application publication No. CN115252004a entitled "biopsy needle with three modes of use", and will not be described in detail herein.

In order to avoid the first and

second actuation buttons

51, 61 from being touched by mistake to cause the inner needle assembly 30 and the outer needle assembly 20 to be activated by mistake, the biopsy needle 100 of the above embodiment of the present application is further provided with a button protection device for locking and unlocking the first and

second actuation buttons

51, 61 to move within the housing 10. As shown in fig. 1 and 2, the key guard includes mounting through holes 80 formed through opposite sides of the housing 10 in a direction perpendicular to the key moving direction, and a safety lock 70 slidably inserted into the mounting through holes 80. The safety lock 70 moves along the mounting through hole 80 to have a first limit position and a second limit position. The safety lock 70 prevents movement of the first actuation key 51 and the second actuation key 61 when in the first limit position, locking the first actuation key 51 and the second actuation key 61 (see fig. 1). The safety lock 70 is in the second limit position to avoid movement of the first actuation key 51 and the second actuation key 61, and unlock the first actuation key 51 and the second actuation key 61 (see fig. 2).

Referring to fig. 3, the upper cover 11 and the base 12 of the case 10 are respectively provided with an upper half through hole 111 and a lower half through hole 121 penetrating at both sides of a joint therebetween, the upper half through hole 111 and the lower half through hole 121 are combined to form a mounting through hole 80 after the upper cover 11 and the base 12 are combined, and the mounting through hole 80 is located in front of the first excitation key 51 and the second excitation key 61 in the key movement direction. With further reference to fig. 4 and 5, the safety lock 70 has a first end 71 and a second end 72 opposite the first end 71, and the body of the safety lock 70 has a cross-sectional shape substantially conforming to the mounting through-hole 80 so that the safety lock 70 can slide within the mounting through-holes 80 on both sides of the housing 10. The rear sides of the safety lock 70 facing the first and second

actuating keys

51 and 61 extend out of the first and

second limit protrusions

73 and 74 in the key movement direction, and a certain interval is formed between the first and

second limit protrusions

73 and 74 in the safety lock movement direction. The front side of the safety lock 70 is provided with a first clamping groove 75 and a second clamping groove 76 which are spaced along the moving direction of the safety lock, and the first clamping groove 75 and the second clamping groove 76 are preferably V-shaped grooves. Further, the first end 71 of the safety lock 70 forms a first limit stop edge 711, a locking mark 712 is disposed on the periphery of the first end 71, the second end 72 of the safety lock 70 forms a second limit stop edge 721, and an unlocking mark 722 is formed on the periphery of the second end 72.

Referring to fig. 6 and 7, a support arm 114 extends downward from the top in the upper cover 11, and a fastening position 115, preferably a V-shaped fastening position corresponding to the V-shaped fastening groove, for fastening with the first fastening groove 75 and the second fastening groove 76 is formed at the rear side of the support arm 114. When the safety lock 70 moves to the locking position 115 within the mounting through hole 80 to be locked into the first locking groove 75 by the elastic deformation of the arm 114, the safety lock 70 is positioned at the first limit position, i.e., the locking position (as shown in fig. 7). When the safety lock 70 moves to the locking position 115 in the mounting through hole 80, and is released from the first clamping groove 74 by the elastic deformation of the support arm 114 and then locked into the second clamping groove 75, the safety lock 70 is positioned at the second limit position, i.e. the unlocking position. According to various embodiments of the present application, the arm 114 may also be disposed in the base 12, extend upward from the bottom of the base 12, and switch the safety lock 70 between the first limit position and the second limit position by cooperating the locking position 115 with the first slot 75 and the second slot 76 on the safety lock 70. According to various embodiments of the present application, an elastic buckle may be further disposed on the safety lock 70, and a first slot and a second slot are disposed in the housing 10 to cooperate to realize the switching between the first limit position and the second limit position of the safety lock 70.

With further reference to fig. 8, when the safety lock 70 is in the first limit position, the first limit protrusion 73 and the second limit protrusion 74 of the safety lock 70 just abut against the first limit surface 511 and the second limit surface 611 on the front sides of the first actuation button 51 and the second actuation button 61, respectively, so as to limit the first actuation button 51 and the second actuation button 61 from moving forward. Also at this time, the first end 71 of the safety lock 70 is exposed from the side of the housing 10 through the mounting through hole 80, and the locking mark 712 is exposed, so that it is convenient for the user to recognize that the biopsy needle 100 is currently in the locked state. The second end 72 of the safety lock 70 is received in the mounting hole 80, and the second stop edge 721 abuts against a second stop step 82 formed by the outer surfaces of the upper cover 11 and the base 12 around the mounting hole 80, so as to provide a further stop for the safety lock 70 in the first stop position and prevent the safety lock 70 from being removed from the safety hole 80.

When the first end 71 of the safety lock 70 is pushed to move the safety lock 70 to the second limit position in the mounting through hole 80 while the safety lock 70 is in the aforementioned first limit position, as shown in fig. 9, the first limit projection 73 and the second limit projection 74 of the safety lock 70 move to positions right opposite to the first through hole 512 and the second through hole 612 opened at the front sides of the first actuation key 51 and the second actuation key 61, respectively, so as to avoid the first actuation key 51 and the second actuation key 61 from moving forward. Also at this time, the second end 72 of the safety lock 70 is exposed from the mounting through hole 80 to the outside of the other side of the housing 10, and the unlocking mark 722 is exposed, so that it is convenient for the user to recognize that the biopsy needle 100 is currently in the unlocked state. The first end 71 of the safety lock 70 is received in the mounting through hole 80, and the first stop edge 711 abuts against the first stop step 81 formed by the outer surfaces of the upper cover 11 and the base 12 around the mounting through hole 80, so as to provide a further stop effect for the safety lock 70 in the second stop position, and prevent the safety lock 70 from being removed from the safety through hole 80.

When the safety lock 70 is in the second limit position, as shown in fig. 10, the first actuation button 51 and the second actuation button 61 are pressed, and the first limit protrusion 73 and the second limit protrusion 74 of the safety lock 70 are respectively inserted into the first via hole 512 and the second via hole 612 to avoid the movement of the first actuation button 51 and the second actuation button 61, so that the first actuation button 51 and the second actuation button 61 can actuate the inner needle assembly 30 and the outer needle assembly 20. Then, the first actuation button 51 and the second actuation button 61 are respectively reset under the action of the respective reset springs, and then the second end 72 of the safety lock 70 is pushed to make the safety lock 70 move to the first limit position in the mounting through hole 80, and the safety lock 70 locks the first actuation button 51 and the second actuation button 61 again.

According to the biopsy needle 100 of the embodiment of the present application, the installation through hole 80 formed on the housing 10 and the safety lock 70 slidably inserted in the installation through hole 80 form a key protection device, the safety lock 70 is switched between the first limit position and the second limit position in the installation through hole 80, so that the movement of the first excitation key 51 and the second excitation key 61 in the housing 10 can be locked and unlocked, and even if the first excitation key 51 and the second excitation key 61 are mistakenly touched in the locked state, the mistaken excitation of the inner needle and the outer needle can not be caused, thereby not only facilitating the operation, but also improving the safety of the biopsy needle 100.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims

1. The key protection device is used for locking and unlocking keys moving in a shell, and comprises at least one key which is arranged side by side and moves in the same direction, and is characterized by comprising mounting through holes which are formed in opposite sides of the shell along the direction perpendicular to the moving direction of the keys, wherein the mounting through holes are positioned in front of the keys in the moving direction of the keys; the key protection device further comprises a safety lock which is slidably inserted into the installation through hole, the safety lock is provided with a first limiting position and a second limiting position along the installation through hole, the rear side of the safety lock in the key moving direction is provided with at least one limiting structure corresponding to the at least one key, the at least one limiting structure prevents the at least one key from moving when the safety lock is located at the first limiting position, and the at least one limiting structure avoids the at least one key from moving when the safety lock is located at the second limiting position.

2. The key guard of claim 1, wherein the safety lock is provided with at least one limit projection extending toward the at least one key in a key movement direction corresponding to the at least one key; the safety lock is characterized in that when the safety lock is in a first limiting position, the at least one limiting lug is abutted with a limiting surface correspondingly arranged on the at least one key to limit the movement of the key, and when the safety lock is in a second limiting position, the at least one limiting lug is opposite to a through hole correspondingly arranged on the at least one key to penetrate through so as to avoid the movement of the key.

3. The key guard of claim 1, wherein the safety lock is configured to achieve the first limit position and the second limit position in the housing by a resilient snap fit with two slots distributed along a direction of movement of the safety lock.

4. The key protection device according to claim 3, wherein a first clamping groove and a second clamping groove which extend vertically are formed on the front side of the safety lock in the key moving direction and correspond to the first limiting position and the second limiting position; the shell is internally provided with a support arm extending downwards from the top or upwards from the bottom, and a buckling position which is buckled into the first clamping groove when at a first limiting position and buckled into the second clamping groove when at a second limiting position is formed on the support arm.

5. The key guard of claim 4, wherein the first and second slots are V-shaped slots, and the locking portions are V-shaped locking portions.

6. The key guard of claim 1, wherein the safety lock has a first end and a second end opposite the first end, the first end of the safety lock being exposed from the mounting through hole out of the housing side when the safety lock is moved into the first limit position within the mounting through hole, the second end of the safety lock being received within the mounting through hole; when the safety lock moves to the second limiting position in the mounting through hole, the second end of the safety lock is exposed out of the other side of the shell from the mounting through hole, and the first end of the safety lock is retracted into the mounting through hole.

7. The key guard of claim 6, wherein the safety lock has a locking tab on a periphery of the first end and an unlocking tab on a periphery of the second end.

8. The key guard of claim 6, wherein a first end of the safety lock forms a first limit stop edge, a second end of the safety lock forms a second limit stop edge, and two side outer surfaces of the housing form limit steps around the mounting through hole, respectively; when the safety lock moves to the first limiting position in the mounting through hole, the second limiting blocking edge is abutted with the limiting step on the corresponding side of the shell, and when the safety lock moves to the second limiting position in the mounting through hole, the first limiting blocking edge is abutted with the limiting step on the corresponding side of the shell.

9. The utility model provides a biopsy needle, includes casing, outer needle subassembly, interior needle subassembly, loading subassembly and excitation subassembly, outer needle subassembly and interior needle subassembly along with advance the parallel direction activity of needle direction set up in the casing, loading subassembly drive interior needle subassembly and outer needle subassembly elastic loading is put in place, the excitation subassembly is relieved the loading spacing of interior needle subassembly and outer needle subassembly through the excitation button so that interior needle subassembly and outer needle subassembly are by elasticity excitation, its characterized in that, biopsy needle still sets up the button protector of any one of claims 1-8 locking and unblock the removal of excitation button in the casing.

10. The biopsy needle of claim 9, wherein the excitation assembly comprises a first excitation assembly and a second excitation assembly, the first and second excitation assemblies acting upon the inner needle assembly and the outer needle assembly by movement of a first excitation key and a second excitation key disposed side-by-side within the housing, respectively; the safety lock of the key protection device is provided with a first limiting structure and a second limiting structure corresponding to the first excitation key and the second excitation key respectively, the first limiting structure and the second limiting structure respectively prevent the first excitation key and the second excitation from moving when the safety lock is positioned at a first limiting position, and the first limiting structure and the second limiting structure respectively avoid the first excitation key and the second excitation from moving when the safety lock is positioned at a second limiting position.