A portable needle removal device

Abstract

This utility model relates to the field of medical devices and discloses a convenient needle removal device, including a control mechanism. The upper end of the control mechanism is equipped with a clamping mechanism. The control mechanism includes a housing; a rubber sleeve is fitted onto the outer surface of the housing near the center; a protective sleeve is fixedly fitted onto the outer surface of the housing near the lower end; an outer rod is fitted inside the housing; an inner rod is slidably fitted onto the inner surface of the outer rod; a clamping head is fixedly mounted on the upper end of the inner rod; a return spring is fitted onto the inner rod near the center; the clamping mechanism includes a connecting block; a needle tube is fixedly mounted on the upper end of the connecting block near the center; a push pin is slidably fitted inside the needle tube; and a control block is slidably fitted inside the connecting block. In this utility model, the convenient needle removal device includes an outer rod, and the movement of the push pin is controlled by a knob design, thereby ensuring precise control of the clamping force.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a convenient device for removing broken needles. Background Technology

[0002] A broken needle removal instrument is a commonly used surgical instrument in dentistry, mainly used to remove broken needles or other small metal objects during dental surgery. The instrument is ingeniously designed, easy to carry and operate, and can easily enter the narrow space inside the mouth, ensuring the smooth progress of the surgical procedure and greatly improving the efficiency of dentists during the operation.

[0003] The existing patent "A Root Canal Extractor (Publication No.: CN220275738U)" discloses "This utility model discloses a root canal extractor, including a shell, a needle, and a clamping component. The outer wall of the shell is provided with an adjusting handle, the needle is located at the end of the shell, the needle is provided with a needle tube, the outer peripheral wall of the needle tube has a retrieval opening, the clamping component is located inside the shell, the outer wall of the shell is provided with a slot, the adjusting handle is slidably connected to the clamping component through the slot, and the clamping end of the clamping component can extend to the end of the needle tube. The beneficial effect is: first, the retrieval opening on the outer peripheral wall of the needle tube is aligned with the root canal residue, and then by pressing the adjusting handle, the adjusting handle can drive the clamping end of the clamping component to extend towards the end of the needle tube. When the clamping end of the clamping component reaches the retrieval opening of the needle tube, the clamping end of the clamping component will hold the root canal residue, and finally the root canal residue is removed from the patient's mouth. The pressing method makes the operation more labor-saving for the doctor."

[0004] While the aforementioned patent allows users to adjust the length of the handle, the numerous adjustment components may complicate the subsequent cleaning process. Furthermore, the small size of the pin shaft, coupled with the fact that doctors typically wear medical gloves during surgery, could limit finger dexterity and potentially affect surgical procedures. Additionally, the clamping force relies primarily on the lever transmission of the pressing component, and the adjustability of the handle may result in unstable force transmission, making it difficult for doctors to precisely control the clamping force and potentially impacting the surgical outcome.

[0005] Therefore, those skilled in the art have provided a convenient instrument for removing broken needles to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a convenient needle removal device. This device has an outer rod and a knob-type design to control the movement of the pin, thereby ensuring precise control of the clamping force.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A convenient needle removal device includes a control mechanism, wherein a clamping mechanism is provided at the upper end of the control mechanism;

[0009] The control mechanism includes a housing, a rubber sleeve is fitted on the outer surface of the housing near the middle position, a protective sleeve is fixedly fitted on the outer surface of the housing near the lower end, an outer rod is fitted inside the housing, an inner rod is slidably fitted on the inner surface of the outer rod, a clamping head is fixedly provided at the upper end of the inner rod, and a return spring is fitted on the inner rod near the middle position.

[0010] The clamping mechanism includes a connecting block, a needle tube is fixedly disposed on the upper end of the connecting block near the middle, a top pin is slidably sleeved inside the needle tube, and a control block is slidably sleeved inside the connecting block.

[0011] Furthermore, the outer surface of the outer rod is slidably sleeved inside the outer shell near the upper end, and the outer surface of the outer rod is threadedly sleeved between the lower end and the outer shell.

[0012] Furthermore, the clamping head includes four arc-shaped plates, all of which are fixedly connected to the upper end of the inner rod 105, and there is a gap between each pair of the four arc-shaped plates.

[0013] Furthermore, the upper end of the return spring is fixedly connected to the inner surface of the outer rod, and the lower end of the return spring is fixedly connected to the outer surface of the inner rod.

[0014] Furthermore, the inner surface of the connecting block near the lower end is threaded onto the outer surface of the outer shell near the upper end.

[0015] Furthermore, the lower end of the ejector pin is fixedly connected to the upper end of the control block.

[0016] Furthermore, the outer surface of the control block is slidably fitted inside the connecting block near the upper end, and the lower end of the control block is fitted inside the clamping head.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model proposes a convenient broken needle removal instrument. The broken needle removal instrument is equipped with a control mechanism. During use, the control mechanism is equipped with a rubber sleeve. The groove on the surface of the rubber sleeve fits the human hand. The rubber sleeve has a certain degree of elasticity. The rubber sleeve replaces the adjustment handle, realizing the function of adjusting the adjustment handle according to the palm size. It reduces the number of small parts in the instrument, which not only reduces the difficulty of cleaning and sterilization, but also avoids the operation of manual adjustment, ensuring the convenience of operation during surgery.

[0019] 2. This utility model proposes a convenient broken needle removal instrument. The broken needle removal instrument is equipped with a control mechanism. During use, the control mechanism is equipped with an outer rod and an inner rod. The outer rod presses against the clamping head, causing the clamping head to converge and clamp the control block, thereby controlling the movement of the ejector pin to clamp the broken needle. At the same time, rotating the outer rod drives the movement of the ejector pin, thereby controlling the clamping force on the broken needle. It is not only easy to operate, but the fixedness of the thread can ensure that the doctor can accurately control the clamping force, thus ensuring the surgical effect. Attached Figure Description

[0020] Figure 1 This is an axonometric view of the present invention;

[0021] Figure 2 This is a cross-sectional axonometric view of the clamping mechanism in this utility model;

[0022] Figure 3 This is an isometric view of the control mechanism in this utility model;

[0023] Figure 4 This is a cross-sectional axonometric view of the control mechanism in this utility model.

[0024] Legend:

[0025] 1. Control mechanism; 101. Outer shell; 102. Rubber sleeve; 103. Protective sleeve; 104. Outer rod; 105. Inner rod; 106. Clamping head; 107. Return spring; 2. Clamping mechanism; 201. Connecting block; 202. Needle tube; 203. Ejector pin; 204. Control block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figure 1 One embodiment of this utility model is a convenient needle removal device, which includes a control mechanism 1 and a clamping mechanism 2 at the upper end of the control mechanism 1.

[0028] Specifically, control mechanism 1 is a structure in which the doctor controls the clamping force on the broken needle, and clamping mechanism 2 uses needle tube 202 and tip 203 to clamp the broken needle.

[0029] Reference Figure 3 , Figure 4The control mechanism 1 includes a housing 101. A rubber sleeve 102 is fitted on the outer surface of the housing 101 near the middle position. A protective sleeve 103 is fixedly fitted on the outer surface of the housing 101 near the lower end. An outer rod 104 is fitted inside the housing 101. An inner rod 105 is slidably fitted on the inner surface of the outer rod 104. A clamping head 106 is fixedly provided at the upper end of the inner rod 105. A return spring 107 is fitted on the inner rod 105 near the middle position.

[0030] The outer surface of the outer rod 104 is slidably sleeved inside the outer shell 101 near the upper end, and the outer surface of the outer rod 104 is threadedly sleeved with the outer shell 101 near the lower end. The clamping head 106 includes four arc-shaped plates, all of which are fixedly connected to the upper end of the inner rod 105. There is a gap between each pair of the four arc-shaped plates. The upper end of the return spring 107 is fixedly connected to the inner surface of the outer rod 104, and the lower end of the return spring 107 is fixedly connected to the outer surface of the inner rod 105.

[0031] Specifically, the outer shell 101 is the protective structure of the entire instrument. It can connect the control mechanism 1 and the clamping mechanism 2 together, and prevent liquid from entering the instrument and causing adverse effects on the internal parts. The rubber sleeve 102 is fitted on the outer surface of the outer shell 101 and is the position where the user holds the instrument. Its surface has grooves that fit the shape of the human hand, making it easy for doctors to hold. The position of the rubber sleeve 102 can be adjusted by sliding along the outer shell 101 according to the user's needs, and it can also be replaced.

[0032] It should be noted that the instrument uses a rubber sleeve 102 instead of the adjustment handle in the comparative patent. On the one hand, the difference in the size of an adult's palm is small, so it does not have a significant impact on the doctor's grip on the instrument. On the other hand, the elasticity and groove design of the rubber sleeve 102 can well adapt to the doctor's grip needs. In addition, the friction between the rubber sleeve 102 and the outer shell 101 can ensure the relative stability between the rubber sleeve 102 and the outer shell 101. Only by using a large pushing force can the two move relative to each other.

[0033] The protective sleeve 103 is located at the lower end of the outer shell 101 and is fitted onto the outer surface of the outer rod 104. During the adjustment process, the outer rod 104 will move up and down, creating a gap between the outer shell 101 and the outer rod 104. The protective sleeve 103 can prevent impurities or liquids from entering the interior of the outer shell 101 through the gap and contaminating the internal parts.

[0034] The outer rod 104 and the inner rod 105 cooperate to clamp and adjust the position of the control block 204. Pressing the inner rod 105 allows it to slide up and down within the outer rod 104. The clamping head 106 consists of four arc-shaped plates with gaps between each pair of plates, wider at the top and narrower at the bottom. The arc-shaped plates are made of medical-grade spring steel, which is thin and has a certain degree of elasticity. The upper and lower parts of the outer surface of the arc-shaped plates have different radii, with the upper part having a larger radius. When the lower half of the clamping head 106 retracts into the outer... In rod 104, the inner wall of outer rod 104 exerts a certain pressure on the upper end of clamping head 106, causing the upper ends of the four arc-shaped plates to converge towards the center, thereby clamping the control block 204. When clamping head 106 slides out of outer rod 104, the arc-shaped plates return to their original shape under the action of elasticity, and at this time there is no clamping effect on control block 204. The two ends of return spring 107 are connected to outer rod 104 and inner rod 105 respectively. After pressing inner rod 105, return spring 107 can reset it.

[0035] Reference Figure 2 The clamping mechanism 2 includes a connecting block 201. A needle tube 202 is fixedly disposed on the upper end of the connecting block 201 near the middle. A push pin 203 is slidably sleeved inside the needle tube 202. A control block 204 is slidably sleeved inside the connecting block 201.

[0036] The inner surface of the connecting block 201 near the lower end is threaded onto the outer surface of the outer shell 101 near the upper end. The lower end of the ejector pin 203 is fixedly connected to the upper end of the control block 204. The outer surface of the control block 204 near the upper end is slidably sleeved inside the connecting block 201. The lower end of the control block 204 is sleeved in the clamping head 106.

[0037] Specifically, the inner surface of the connecting block 201 is provided with a thread near the lower end for connecting the connecting block 201 to the outer shell 101. The needle tube 202 is fixed and has a clamping port near the upper end. The ejector pin 203 can slide up and down in the needle tube 202. The relative position between the ejector pin 203 and the clamping port determines the clamping force on the broken needle. The control block 204 can be temporarily connected to the inner rod 105 in the control mechanism 1 to facilitate the control of the position of the ejector pin 203 through the control mechanism 1.

[0038] Working principle: When using this instrument to clamp a broken needle, the instrument needs to be installed first. Rotate the outer rod 104 so that the outer rod 104 is fitted inside the outer shell 101, with the threaded part being relatively short and the outer rod 104 in a lower position. Press the inner rod 105, the return spring 107 retracts, and the clamping head 106 disengages from the outer rod 104. The upper ends of the four arc-shaped plates spread outward. Align the control block 204 with the middle position of the clamping head 106 and insert it into it. Then release the inner rod 105. Under the elastic force of the return spring 107, the inner rod 105 returns to its original position, and the lower half of the clamping head 106 retracts into the outer rod 104. The inner wall of the outer rod 104 has a pressing effect on the arc-shaped plates, causing the arc-shaped plates to converge towards the middle, thereby achieving the clamping effect on the control block 204. At the same time, the pressing effect can keep the outer rod 104 and the inner rod 105 relatively stationary, allowing for synchronous movement. Then rotate the connecting block 201 to assemble and fix it with the outer shell 101.

[0039] During use, when the broken needle is inserted into the clamping port in the needle tube 202, the lower end of the outer rod 104 is slowly rotated. Under the action of the thread, the outer rod 104 rotates and moves upward along the outer shell 101. The inner rod 105 moves upward along with the control block 204, and the ejector pin 203 also moves upward. As the ejector pin 203 moves upward, the clamping force on the broken needle gradually increases until the clamping force is appropriate, thus achieving effective clamping of the broken needle.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing 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. 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 convenient needle removal device, comprising a control mechanism (1), characterized in that: The upper end of the control mechanism (1) is provided with a clamping mechanism (2); The control mechanism (1) includes a housing (101), a rubber sleeve (102) is fitted on the outer surface of the housing (101) near the middle position, a protective sleeve (103) is fixedly fitted on the outer surface of the housing (101) near the lower end, an outer rod (104) is fitted inside the housing (101), an inner rod (105) is slidably fitted on the inner surface of the outer rod (104), a clamping head (106) is fixedly provided at the upper end of the inner rod (105), and a return spring (107) is fitted on the inner rod (105) near the middle position; The clamping mechanism (2) includes a connecting block (201), a needle tube (202) is fixedly disposed on the upper end of the connecting block (201) near the middle, a push pin (203) is slidably sleeved inside the needle tube (202), and a control block (204) is slidably sleeved inside the connecting block (201).

2. The convenient needle removal device according to claim 1, characterized in that: The outer surface of the outer rod (104) is slidably sleeved inside the outer shell (101) near the upper end, and the outer surface of the outer rod (104) is threadedly sleeved between the lower end and the outer shell (101).

3. The portable needle removal device according to claim 1, characterized in that: The clamping head (106) includes four arc-shaped plates, all of which are fixedly connected to the upper end of the inner rod (105), and there is a gap between each pair of the four arc-shaped plates.

4. The convenient needle removal device according to claim 1, characterized in that: The upper end of the return spring (107) is fixedly connected to the inner surface of the outer rod (104), and the lower end of the return spring (107) is fixedly connected to the outer surface of the inner rod (105).

5. A convenient needle removal device according to claim 1, characterized in that: The inner surface of the connecting block (201) near the lower end is threaded onto the outer surface of the outer shell (101) near the upper end.

6. A convenient needle removal device according to claim 1, characterized in that: The lower end of the ejector pin (203) is fixedly connected to the upper end of the control block (204).

7. A convenient needle removal device according to claim 1, characterized in that: The outer surface of the control block (204) is slidably fitted inside the connecting block (201) near the upper end, and the lower end of the control block (204) is fitted in the clamping head (106).

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