Safe locking mechanism for biopsy winding device
By designing a safety locking mechanism and utilizing the synchronous rotation and limiting structure of components such as buttons and safety pin shafts, the safety hazards caused by misoperation of biopsy needles are solved, achieving the effect of preventing accidental release. Moreover, the structure is simple, low-cost, and easy to promote.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHAMFOND BIOTECH CO LTD
- Filing Date
- 2024-12-06
- Publication Date
- 2026-04-21
AI Technical Summary
Existing biopsy needles are prone to misoperation and may cause accidental release, posing a safety hazard. Misoperation must be prevented.
Design a safety locking mechanism, including components such as a button, a safety bolt shaft, a safety bolt lever, a safety bolt limiting boss, and a baffle, to prevent misoperation through synchronous rotation and a limiting structure, and to ensure that the button can be fired normally when pressed.
It effectively prevents misoperation, has a simple and stable structure, low cost, is easy to assemble, and is convenient for market promotion.
Smart Images
Figure CN224140847U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical and health device technology, and mainly relates to a safety locking mechanism for a biopsy strut device. Background Technology
[0002] Biopsy needles generally consist of an inner needle (core) and an outer needle (sheath). As medical devices used for tissue sampling and cell aspiration, the inner and outer needles must be fixed in their firing positions before being fired sequentially. Because they need to penetrate the body successfully, they require tremendous driving force. This immense force, however, presents safety risks; misoperation can easily lead to accidental firing and medical incidents.
[0003] Therefore, a safety locking mechanism is urgently needed to prevent accidental operation. Utility Model Content
[0004] To address the aforementioned problems, this invention provides a safety locking mechanism for a biopsy strut device, which can prevent accidental operation.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0006] A safety locking mechanism for a biopsy winding device is located at the rear cover of the biopsy power unit. It includes a button, a safety bolt shaft, a safety stop plate, and a safety bolt lever. The safety bolt shaft is connected to the safety bolt lever. The safety bolt shaft has a synchronously rotatable safety bolt limiting boss. The safety bolt limiting boss has a boss limiting post and a boss groove. When locked, the boss groove is misaligned with the button, preventing the button from being pressed. When unlocked, the safety bolt lever drives the safety bolt shaft to rotate 90°. Due to the pressure, the safety stop plate moves backward to abut against the boss limiting post, aligning the boss groove with the button. Pressing the button moves it into the boss groove, facilitating the button's firing action.
[0007] Furthermore, it also includes a safety bolt torsion spring, which is sleeved on the safety bolt shaft and used for the rotational reset of the safety bolt shaft.
[0008] Furthermore, it also includes a ejector pin, which is disposed on the front side of the safety baffle and is used to connect to the firing mechanism of the biopsy power unit.
[0009] Furthermore, it also includes a baffle spring, which is disposed between the safety baffle and the rear cover for resetting the safety baffle.
[0010] Furthermore, a protruding safety stop limiting boss is provided on the left side of the safety stop, which is used to limit the boss limiting post of the safety bolt limiting boss after unlocking.
[0011] Furthermore, the lower side of the safety stop limiting boss is provided with a safety stop sliding slope, which avoids the safety bolt limiting boss post of the safety bolt limiting boss, so that it can rotate and unlock without restriction.
[0012] Furthermore, it also includes a button spring, one end of which is located on the rear side of the rear hook of the hook mechanism, and the other end abuts against the cover of the biopsy power device. The button is horizontally located on the right side of the safety baffle, and the setting direction of the button spring is consistent with the pressing direction of the button.
[0013] Furthermore, the lower side of the button end is provided with a protruding button limiting boss. In the unlocked state, the button limiting boss is aligned with the boss groove of the safety bolt limiting boss. When the button is pressed, the button limiting boss moves into the boss groove, which facilitates the button to complete the firing action.
[0014] Furthermore, one end of the safety bolt rotating shaft is movably connected to the upper winding mechanism, and the other end is rotatably mounted on the rear cover.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] This utility model provides a safety locking mechanism for a biopsy strut device. It prevents misoperation, has a simple and stable structure, low manufacturing cost, low assembly difficulty, and is easy to promote in the market. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the state of the power unit when it has completed its upper winding.
[0018] Figure 2 This is a schematic diagram of the locking state of the safety locking mechanism of this utility model (rear cover omitted).
[0019] Figure 3 This is a partial schematic diagram of the locking state of the safety locking mechanism of this utility model (the back cover and safety bolt lever are omitted).
[0020] Figure 4 This is a schematic diagram of the unlocked state of the safety locking mechanism of this utility model (back cover omitted).
[0021] Figure 5 This is an assembly diagram of the safety bolt rotating shaft, safety bolt torsion spring, and safety bolt limiting boss of this utility model.
[0022] Figure 6 This is an assembly diagram of the winding mechanism, firing mechanism, hook mechanism and safety locking mechanism of this utility model.
[0023] in:
[0024] 1. Back cover;
[0025] 2. Button; 2-1. Button limiting boss;
[0026] 3. Safety bolt pivot;
[0027] 4. Safety bolt torsion spring;
[0028] 5. Safety baffle; 5-1. Safety baffle limiting boss; 5-2. Safety baffle sliding ramp;
[0029] 6. Baffle spring;
[0030] 7. Safety bolt limiting boss; 7-1. Boss limiting post; 7-2. Boss groove;
[0031] 8. Safety bolt lever;
[0032] 9. Threshold pin;
[0033] 10. Button spring;
[0034] 11. Upper winding mechanism;
[0035] 12. Firing mechanism; 12-1. Rear slider; 12-2. Rear hook pin; 12-3. Rear slider boss;
[0036] 13. Hook mechanism; 13-1. Rear hook. Detailed Implementation
[0037] The specific embodiments of this utility model will be further explained below with reference to the accompanying drawings.
[0038] like Figures 2-5 As shown, a safety locking mechanism for a biopsy winding device is installed at the rear cover 1 of the biopsy power device. It is mainly used to lock and unlock the firing action after the biopsy power device is wound to prevent accidental operation.
[0039] like Figure 1 , 6 As shown, this is a biopsy power device, mainly including a winding mechanism 11, a firing mechanism 12, and a hooking mechanism 13. The firing mechanism 12 mainly includes a main shaft 209, with a front slider, a striking block, and a rear slider 12-1 sequentially mounted on the main shaft 209. The three are linked by a spring. A front hook pin for installing the outer needle and a rear hook pin 12-2 for installing the inner needle are respectively mounted on the front slider and the rear slider 12-1. The hooking mechanism 13 includes a rotatable front hook and a rear hook 13-1. The front hook is used to hook the front hook pin, and the rear hook 13-1 is used to hook the rear hook pin 12-2. Once the rear hook 13-1 disengages from the rear hook pin 12-2, the inner and outer needles of the biopsy needle are ejected through the linkage of the firing mechanism 12 and the hooking mechanism 13.
[0040] For ease of description, Figure 2 For example, the current regulations Figure 2 The left side is the front, and the corresponding right side is the back. Figure 2 The bottom side is left, and the corresponding top side is right.
[0041] A safety locking mechanism for a biopsy winding device is provided at the rear cover 1 of the biopsy power device, including a button 2, a safety bolt shaft 3, a safety bolt torsion spring 4, a safety baffle 5, a baffle spring 6, a safety bolt limiting boss 7, a safety bolt lever 8, and a pin 9.
[0042] The safety baffle 5 is vertically mounted on the front side of the rear cover 1 (i.e., inside the biopsy power unit). The ejector pin 9 is mounted on the front side of the safety baffle 5 and is used to insert the rear slider boss 12-3. The rear slider boss 12-3 is located on the top of the rear slider 12-1 of the firing mechanism 12. Therefore, once the winding is completed, the rear slider boss 12-3 of the rear slider 12-1 gives the ejector pin 9 a backward thrust. The baffle spring 6 is located between the safety baffle 5 and the rear cover 1. Once the ejector pin 9 is squeezed by the front rear slider boss 12-3, it pushes the safety baffle 5 to move backward and squeezes the baffle spring 6. The baffle spring 6 provides a restoring force for the safety baffle 5 and the ejector pin 9 to reset.
[0043] A safety stop plate limiting boss 5-1 is provided on the left side of the safety stop plate 5 to limit the safety bolt limiting boss 7. A safety stop plate sliding slope 5-2 is provided on the lower side of the safety stop plate limiting boss 5-1 to ensure that the rotation of the safety bolt limiting boss post 7-1 provided on the safety bolt limiting boss 7 is not restricted by the safety stop plate 5 when unlocking.
[0044] One end of the safety bolt rotating shaft 3 is movably connected to the handle of the upper winding mechanism 11, and the other end is rotatably mounted on the rear cover 1. The safety bolt torsion spring 4 is sleeved on the safety bolt rotating shaft 3.
[0045] The safety bolt lever 8 is located on the rear side of the rear cover 1 and connected to the safety bolt shaft 3. It is L-shaped. When its long arm is in the horizontal position, the safety locking mechanism is in the locked state. When its long arm is rotated counterclockwise 90° to the vertical position, the safety locking mechanism is in the unlocked state.
[0046] The safety bolt limiting boss 7 is located at the end of the safety bolt rotating shaft 3 and in front of the rear cover 1, and rotates synchronously with the safety bolt rotating shaft 3. The safety bolt limiting boss 7 is provided with a boss limiting post 7-1 and a boss groove 7-2. The boss limiting post 7-1 is used to abut against the safety baffle limiting boss 5-1 of the safety baffle 5 when the unlocked state is in use. The boss groove 7-2 is used to face the button limiting boss 2-1 of the button 2 when the unlocked state is in use, so that it can be pressed to complete the firing action. When the locked state is in use, both the boss limiting post 7-1 and the boss groove 7-2 are located below the safety baffle 5 and the button 2.
[0047] Rotating the safety bolt lever 8 counterclockwise by 90° causes the safety bolt shaft 3 to rotate synchronously by 90°, which in turn causes the boss limiting post 7-1 and the boss groove 7-2 on the safety bolt limiting boss 7 located inside the rear cover 1 to rotate synchronously by 90°.
[0048] like Figure 4 As shown, the button 2 is horizontally positioned on the right side of the safety baffle 5 and contacts the rear hook 13-1. One end of the button spring 10 is located on the rear side of the rear hook 13-1, and the other end abuts against the middle cover of the biopsy power device. Figure 4 (The middle cover is omitted). The setting direction of the button spring 10 is consistent with the pressing direction of the button 2. When the button 2 is pressed, the rear hook 13-1 is rotated and the button spring 10 is squeezed. The rear hook 13-1 is disengaged from the rear hook pin, thereby activating the inner needle of the biopsy needle. The button spring 10 generates a rebound force due to being squeezed, which facilitates the simultaneous reset of the rear hook 13-1 and the button 2. The lower side of the end of the button 2 is provided with a protruding button limiting boss 2-1. In the unlocked state, the button limiting boss 2-1 corresponds to the boss groove 7-2 of the safety bolt limiting boss 7, which facilitates the button 2 to complete the pressing action.
[0049] The working process of this utility model is as follows:
[0050] Figure 1 The schematic diagram shows the state of the biopsy power device after two winding cycles, which is the initial state of this utility model. Figure 2 As shown, at this time, the long arm of the safety bolt lever 8 is in a horizontal position, which is the locked state. The boss groove 7-2 on the safety bolt limiting boss 7 is located below the button 2, and is misaligned with the button limiting boss 2-1 of the button 2. At the same time, the boss limiting post 7-1 is also located below the safety stop plate 5, as shown. Figure 3 As shown, the ejector pin 9 moves backward under the push of the rear slider boss 12-3, which in turn pushes the safety stop plate 5 to move backward and compresses the stop plate spring 6. If the button 2 is pressed at this time to fire, the button limiting boss 2-1 on the button 2 is in contact with the cylindrical surface of the safety bolt limiting boss 7, so it cannot move and cannot push the rear hook 13-1, thus failing to fire the inner needle of the biopsy needle.
[0051] When unlocking, such as Figure 4As shown, when the safety bolt lever 8 is moved from a horizontal to a vertical position, the safety bolt shaft 3 rotates synchronously by 90°. The boss limiting post 7-1 rotates along the sliding inclined surface 5-2 of the safety stop plate and then abuts against the safety stop plate limiting boss 5-1, causing the safety bolt shaft 3 to be locked at this position. At this time, the button limiting boss 2-1 is aligned with the safety bolt shaft groove 7-2 of the safety bolt shaft 3. If button 2 is pressed at this time, the button limiting boss 2-1 will be positioned corresponding to the safety bolt shaft groove 7-2, resulting in displacement. Pressing button 2 at this time pushes the rear hook 13-1 to rotate, causing the rear hook 13-1 to separate from the rear hook pin 12-2 until the firing mechanism 12 completes all firing actions, and the biopsy needle is finally ejected.
[0052] As the firing action is completed, the ejector pin 9 is no longer squeezed by the rear slider, the baffle spring 6 rebounds, pushing the safety baffle 5 to drive the ejector pin 9 forward and return to the initial state. The safety bolt shaft limiting post 7-1 loses the obstruction of the safety baffle limiting boss 5-1, and the safety bolt shaft 3 rotates under the action of the safety bolt torsion spring 4 to return to the initial state and return to the locking action.
[0053] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A safety locking mechanism for a biopsy stringing device, provided at the rear cover (1) of the biopsy power device, characterized in that, The device includes a button (2), a safety bolt shaft (3), a safety baffle (5), and a safety bolt lever (8). The safety bolt shaft (3) is connected to the safety bolt lever (8). The safety bolt shaft (3) is provided with a safety bolt limiting boss (7) that can rotate synchronously. The safety bolt limiting boss (7) is provided with a boss limiting post (7-1) and a boss groove (7-2). When locked, the boss groove (7-2) is misaligned with the button (2), and the button (2) cannot be pressed to move. When unlocked, the safety bolt lever (8) drives the safety bolt shaft (3) to rotate 90°. Due to the pressure on the safety baffle (5), it moves backward to abut against the boss limiting post (7-1). The boss groove (7-2) is aligned with the button (2). Pressing the button (2) moves it into the boss groove (7-2), which facilitates the firing action of the button (2).
2. A safety lock mechanism for a biopsy stringing device according to claim 1, wherein, It also includes a safety bolt torsion spring (4), which is sleeved on the safety bolt rotating shaft (3) and is used for the rotational reset of the safety bolt rotating shaft (3).
3. A safety lock mechanism for a biopsy stringing device according to claim 1, wherein, It also includes a push pin (9), which is disposed on the front side of the safety baffle (5) for connection with the firing mechanism of the biopsy power unit.
4. The safety lock mechanism for a biopsy stringing device of claim 1, wherein, It also includes a baffle spring (6), which is disposed between the safety baffle (5) and the rear cover (1) for resetting the safety baffle (5).
5. The safety lock mechanism for a biopsy stringing device of claim 1, wherein, The safety baffle (5) has a protruding safety baffle limiting boss (5-1) on the left side, which is used to limit the boss limiting post (7-1) of the safety bolt limiting boss (7) after unlocking.
6. A safety locking mechanism for a biopsy winding device according to claim 5, characterized in that, The lower side of the safety baffle limiting boss (5-1) is provided with a safety baffle sliding slope (5-2). The safety baffle sliding slope (5-2) avoids the boss limiting post (7-1) of the safety bolt limiting boss (7), so that it can rotate and unlock without restriction.
7. A safety lock mechanism for a biopsy stringing device according to claim 1, wherein It also includes a button spring (10), one end of which is located on the rear side of the rear hook (13-1) of the hook mechanism (13), and the other end abuts against the cover of the biopsy power device. The button (2) is horizontally located on the right side of the safety baffle (5), and the setting direction of the button spring (10) is consistent with the pressing direction of the button (2).
8. A safety lock mechanism for a biopsy stringing device according to claim 1, wherein, The lower side of the end of the button (2) is provided with a protruding button limiting boss (2-1). When the button is unlocked, the button limiting boss (2-1) is aligned with the boss groove (7-2) of the safety bolt limiting boss (7). When the button (2) is pressed, the button limiting boss (2-1) moves into the boss groove (7-2) so that the button (2) can complete the firing action.
9. The safety lock mechanism for a biopsy stringing device of claim 1, wherein, One end of the safety bolt rotating shaft (3) is movably connected to the upper winding mechanism (11), and the other end is rotatably mounted on the rear cover (1).