A breast tissue marker pusher with a locking insurance

Abstract

The present invention provides a breast tissue marker pusher with a locking insurance, which includes a push button, a puncture tube, a mandrel and a marker. The marker is placed in the puncture tube and located at the front end of the puncture tube. The rear end of the mandrel is fixedly connected to the push button, and the front end extends into the puncture tube. The pusher further includes an insurance locking device, which includes a limit rod and an insurance button. The rear end of the limit rod is fixedly connected to the push button. The insurance button is provided with a bayonet for locking the mandrel. In the locked state, the insurance button clamps the mandrel through the bayonet, and the front end of the limit rod abuts against the insurance button. The present invention transfers the risk of instrument failure or accidental touch to the built-in insurance locking device.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a breast tissue marker pusher with a locking insurance. Background Art

[0002] After breast puncture or sampling, it is possible to choose to implant a breast tissue marker at the sampling site for subsequent follow-up. Currently, breast tissue markers are generally implanted through a pusher. When in use, the breast tissue marker is placed at the inner head end of the puncture tube of the pusher. After percutaneous puncture and reaching the designated position, the pusher button on the pusher is pushed, and the marker is pushed out through the mandrel, so that the marker remains at the designated position, and then the pusher is withdrawn.

[0003] Since the breast tissue marker pushers on the market are all for single use and cannot be restored after use, a problem will occur, that is, when a person accidentally touches or the pusher button is accidentally touched during transportation, the instrument will be directly scrapped and cannot be used. The method to avoid the above problem is to externally install a device for restricting the movement of the pusher button. The external device is removed before the operation, which not only increases the operation time, but also the external device is easily detached during transportation. Summary of the Invention

[0004] To solve the above problems, the present invention provides a breast tissue marker pusher with a locking insurance, including a pusher button, a puncture tube, a mandrel and a marker. The marker is placed in the puncture tube and is located at the front end of the puncture tube. The rear end of the mandrel is fixedly connected to the pusher button, and the front end extends into the puncture tube. The pusher further includes an insurance locking device, and the insurance locking device includes a limiting rod and an insurance button. The rear end of the limiting rod is fixedly connected to the pusher button. A bayonet for locking the mandrel is provided on the insurance button. In the locked state, the insurance button clamps the mandrel through the bayonet, and the front end of the limiting rod abuts against the insurance button.

[0005] Preferably, in the locked state, the bayonet and the mandrel are in interference fit.

[0006] Preferably, a relief opening for unlocking the mandrel is further provided on the insurance button, and the bayonet is communicated with the relief opening. When unlocking, the insurance button is pressed, and after the mandrel disengages from the bayonet, it enters the relief opening. In the unlocked state, the mandrel moves relative to the relief opening along with the pusher button.

[0007] Preferably, the relief opening and the mandrel are in clearance fit.

[0008] Preferably, the diameter of the bayonet is smaller than the diameter of the relief opening, and the bayonet and the relief opening are communicated through a transition channel.

[0009] Preferably, the width of the transition channel gradually increases from the bayonet towards the diverging opening, and the bayonet, the transition channel, and the diverging opening are sequentially connected to form a V-shaped channel.

[0010] Preferably, the safety button is provided with an avoidance hole matching the limiting rod. In the unlocked state, the limiting rod can penetrate into the avoidance hole and can move relative to the avoidance hole.

[0011] Preferably, the limiting rod and the avoidance hole are in clearance fit.

[0012] Preferably, the limiting rod and the mandrel are arranged in parallel, and the safety button and the mandrel are arranged perpendicular to each other.

[0013] Preferably, a breast tissue marker pusher with a locking safety device further includes a handle, and the rear end of the puncture tube is fixedly connected to the handle;

[0014] The limiting rod is located inside the handle;

[0015] The push button includes a button body and a push body. The button body is fixedly arranged on the push body. The push body is slidably arranged inside the handle and is arranged in parallel with the mandrel; the rear ends of the limiting rod and the mandrel are both fixedly connected to the push body; the button body protrudes to the outside of the handle;

[0016] The safety button includes a pressing body and a safety body. The pressing body is fixedly arranged on the safety body. The safety body is slidably arranged inside the handle and is arranged perpendicular to the mandrel; the bayonet is arranged on the safety body; the pressing body protrudes to the outside of the handle.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] The present invention provides a breast tissue marker pusher with a locking safety device. The present invention transfers the risk of instrument failure or accidental touch to the built-in safety locking device, that is, the pusher is internally provided with a safety locking device. When the safety locking device is in the locked state, the limiting rod cannot pass through the safety button, the push button cannot move forward, and thus cannot push the mandrel, and the mandrel cannot push out the marker. By providing a safety locking device on the pusher, the present invention solves the technical problem that the instrument will be directly scrapped and thus cannot be used due to accidental touch by a person or accidental touch of the push button of the pusher during transportation. The present invention is convenient to operate (press the safety button to unlock), can not only reduce the operation time, but also the safety locking device will not accidentally fall off during transportation. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic internal structure diagram of a breast tissue marker pusher with a locking insurance provided by an embodiment of the present invention;

[0021] Figure 2 is a structural cross-sectional view of a breast tissue marker pusher with a locking insurance provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic structural diagram of an insurance button provided by an embodiment of the present invention;

[0023] Figure 4 is a schematic plan view of the insurance button in the locked state provided by an embodiment of the present invention;

[0024] Figure 5 is a three-dimensional view of the insurance button in the locked state provided by an embodiment of the present invention;

[0025] Figure 6 is a schematic structural diagram of the insurance button in the unlocked state provided by an embodiment of the present invention;

[0026] Figure 7 is a three-dimensional view of the insurance button in the unlocked state provided by an embodiment of the present invention. Detailed Embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] The following will specifically describe the technical solutions of the present invention with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0029] Please refer to Figures 1 to 7, A breast tissue marker pusher with a locking insurance. The present invention adds an insurance locking device on the basis of the existing breast tissue marker pusher. The present invention transfers the risk of instrument failure or accidental touch to the built-in insurance locking device. Specifically, the pusher includes a push button 5, a puncture tube 1, a mandrel 2, a marker 6, and an insurance locking device. The marker 6 is placed inside the puncture tube 1 and is located at the front end of the puncture tube 1. The rear end of the mandrel 2 is fixedly connected to the push button 5, and the front end of the mandrel 2 extends into the puncture tube 1 from the rear port of the puncture tube 1. Inside the puncture tube 1, the front end of the mandrel 2 is located behind the marker 6. The function of the mandrel 2 is to push the marker 6 at the front end of the puncture tube 1 out of the front port of the puncture tube 1 into the breast tissue.

[0030] The insurance locking device includes a limit rod 3 and an insurance button 4. The rear end of the limit rod 3 is fixed to the push button 5, that is, the limit rod 3 and the push button 5 are fixed together. The insurance button 4 is provided with a bayonet 41 for locking the mandrel 2. That is, in the locked state, please refer to Figure 4 and Figure 5 , the insurance button 4 is sleeved on the mandrel 2 through the bayonet 41. The function of the bayonet 41 is to clamp the mandrel 2 tightly, and the purpose is to fix the mandrel 2 so that it does not move. Therefore, in the locked state, the bayonet 41 has an interference fit with the mandrel 2, that is, the mandrel 2 and the insurance button 4 are relatively fixed. In the locked state, the front end of the limit rod 3 abuts against the insurance button 4. That is, in the locked state, since the limit rod 3 is fixedly connected to the push button 5, the push button 5 cannot be pushed, further ensuring the relative fixity between the mandrel 2 and the insurance button 4.

[0031] When unlocking, only need to press the insurance button 4 forcefully to make the mandrel 2 disengage from the bayonet 41 and make the front end of the limit rod 3 disengage from the insurance button 4 (that is, the front end of the limit rod 3 no longer contacts the insurance button 4). At this time, push the push button 5 forward, and the push button 5 will push the mandrel 2 forward, and then the mandrel 2 will push the marker 6 out of the front port of the puncture tube 1.

[0032] Further, the insurance button 4 is also provided with a relief opening 43 for unlocking the mandrel 2. The bayonet 41 is communicated with the relief opening 43. When unlocking, press the insurance button 4, and after the mandrel 2 disengages from the bayonet 41, it enters the relief opening 43. Please refer to Figure 6 and Figure 7 , in the unlocked state, the mandrel 2 moves relative to the relief opening 43 along with the push button 5. In the unlocked state, the insurance button 4 is sleeved on the mandrel 2 through the relief opening 43. Since it is necessary to ensure that the mandrel 2 can move on the relief opening 43, there is a gap between the mandrel 2 and the wall of the relief opening 43. Then it is required that the relief opening 43 has a clearance fit with the mandrel 2.

[0033] The shapes and sizes of the bayonet 41 and the relief opening 43 match those of the mandrel 2, and the diameter of the bayonet 41 is smaller than that of the relief opening 43. In this embodiment, taking the mandrel 2 as an example of a cylinder, then both the bayonet 41 and the relief opening 43 are circular, the diameter of the bayonet 41 is smaller than the diameter of the mandrel 2, and the diameter of the relief opening 43 is larger than the diameter of the mandrel 2.

[0034] Furthermore, the bayonet 41 and the relief opening 43 are connected through a transition channel 42:

[0035] As an embodiment, the width of the transition channel 42 gradually increases from the bayonet 41 towards the relief opening 43. For example, the bayonet 41, the transition channel 42, and the relief opening 43 are connected in sequence to form a V-shaped channel. Of course, the channel formed by the sequential connection of the bayonet 41, the transition channel 42, and the relief opening 43 is not limited to a V shape and can also be conical or the like.

[0036] As another embodiment, the width of the transition channel 42 remains unchanged from the bayonet 41 towards the relief opening 43, that is, the transition channel 42 is a straight cylindrical channel.

[0037] In this embodiment, the safety button 4 is also provided with an avoidance hole 44 that matches the limit rod 3. In the locked state, the front end of the limit rod 3 is offset from the avoidance hole 44; in the unlocked state, please refer to Figure 6 and Figure 7 , the limit rod 3 is directly opposite the avoidance hole 44. When the push button 5 is pushed forward, the limit rod 3 penetrates into the avoidance hole 44 and a relative movement is generated between the limit rod 3 and the avoidance hole 44. In order to ensure a relative displacement between the limit rod 3 and the avoidance hole 44, therefore, there is a gap between the limit rod 3 and the wall of the avoidance hole 44, that is, the limit rod 3 and the avoidance hole 44 are in clearance fit.

[0038] In this embodiment, the limit rod 3 is arranged parallel to the mandrel 2, and the safety button 4 is arranged perpendicular to the mandrel 2.

[0039] In this embodiment, the breast tissue marker pusher with a locking safety device further includes a handle 7, and the rear end of the puncture tube 1 is fixedly connected to the handle 7.

[0040] The limit rod 3 is located inside the handle 7.

[0041] The push button 5 includes a button body and a push body, and the button body is fixedly arranged on the push body. The push body is slidably arranged in the handle 7 and is arranged parallel to the mandrel 2. The rear ends of the limit rod 3 and the mandrel 2 are fixedly connected to the push body. The button body protrudes to the outside of the handle 7. The fixed connection referred to in this embodiment may be a detachable fixed connection or an integral connection.

[0042] The safety button 4 includes a pressing body and a safety body. The pressing body is fixedly arranged on the safety body. The safety body is slidably arranged in the handle 7 and is arranged perpendicular to the mandrel 2; the bayonet 41, the relief opening 43 and the avoidance hole 44 are all arranged on the safety body. The pressing body protrudes to the outside of the handle 7.

[0043] The working principle of the breast tissue marker pusher with locking safety:

[0044] Please refer to Figure 4 and Figure 5 , in the locked state, the safety button 4 is sleeved on the mandrel 2 through the bayonet 41, and the safety button 4 clamps the mandrel 2 through the bayonet 41. The front end of the limit rod 3 abuts against the safety button 4, further ensuring the relative fixity between the mandrel 2 and the safety button 4.

[0045] When unlocking, press the safety button 4. After the mandrel 2 disengages from the bayonet 41 and enters the relief opening 43, the mandrel 2 is in the unlocked state. At this time, the front end of the limit rod 3 is facing the avoidance hole 44, and the limit rod 3 is also in the unlocked state. Please refer to Figure 6 and Figure 7 , then push the push button 5 forward. The limit rod 3 penetrates into the avoidance hole 44 and moves forward along the avoidance hole 44; at the same time, the mandrel 2 moves forward along the relief opening 43, and then the marker 6 at the front end of the puncture tube 1 is pushed out.

[0046] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A breast tissue marker pusher with a locking insurance, comprising a push button, a puncture tube, a mandrel and a marker. The marker is placed in the puncture tube and located at the front end of the puncture tube. The rear end of the mandrel is fixedly connected to the push button, and the front end extends into the puncture tube. It is characterized in that, The pusher further includes a safety locking device, and the safety locking device includes a limit rod and a safety button. The rear end of the limit rod is fixed to the push button; a bayonet for locking the mandrel is provided on the safety button; in the locked state, the safety button clamps the mandrel through the bayonet, and the front end of the limit rod abuts against the safety button; A relief opening for unlocking the mandrel is further provided on the safety button, and the bayonet is communicated with the relief opening; when unlocking, the safety button is pressed, and after the mandrel disengages from the bayonet, it enters the relief opening; in the unlocked state, the mandrel moves relatively with the relief opening along with the push button; The safety button is provided with an avoidance hole matching the limit rod. In the unlocked state, the limit rod can penetrate into the avoidance hole and can move relatively with the avoidance hole.

2. The breast tissue marker pusher with a locking insurance according to claim 1, characterized in that, In the locked state, the bayonet and the mandrel are in interference fit.

3. The breast tissue marker pusher with a locking insurance according to claim 1, characterized in that, The relief opening and the mandrel are in clearance fit.

4. The breast tissue marker pusher with a locking insurance according to claim 1, characterized in that, The diameter of the bayonet is smaller than that of the relief opening, and the bayonet and the relief opening are communicated through a transition channel.

5. The breast tissue marker pusher with a locking insurance according to claim 4, characterized in that, The width of the transition channel gradually becomes larger from the bayonet to the relief opening direction, and the bayonet, the transition channel and the relief opening are communicated in sequence and form a V-shaped channel.

6. The breast tissue marker pusher with a locking insurance according to claim 1, characterized in that, The limit rod and the avoidance hole are in clearance fit.

7. The breast tissue marker pusher with a locking insurance according to claim 1, characterized in that, The limit rod is arranged parallel to the mandrel, and the safety button is arranged perpendicular to the mandrel.

8. The breast tissue marker pusher with a locking insurance according to any one of claims 1 to 7, characterized in that, It further includes a handle, and the rear end of the puncture tube is fixedly connected to the handle; The limit rod is located inside the handle; The push button includes a button body and a push body. The button body is fixedly arranged on the push body. The push body is slidably arranged inside the handle and is arranged parallel to the mandrel; the rear ends of the limit rod and the mandrel are both fixedly connected to the push body; the button body protrudes to the outside of the handle; The safety button includes a pressing body and a safety body. The pressing body is fixedly arranged on the safety body. The safety body is slidably arranged inside the handle and is arranged perpendicular to the mandrel; the bayonet is arranged on the safety body; the pressing body protrudes to the outside of the handle.

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