Automatic broach handle

Abstract

The utility model discloses an automatic broach handle, and belongs to the field of tooth root canal treatment. An automatic broach handle comprises a broach handle shell and further comprises a pintle detachably connected to the bottom of the broach handle shell. The annular plate is connected to the interior of the needle handle shell in a sliding mode, and a long groove is formed in the annular plate; the first clamping blocks are fixedly connected to the inner wall of the needle handle shell and are arranged to be annular, and the number of the first clamping blocks is multiple; the two-way screw rod is rotationally connected into the long groove; the two second clamping blocks are slidably connected to the two ends of the long groove respectively, and the first clamping blocks and the second clamping blocks are provided with inclined planes matched with each other; the broach body is arranged in the broach handle shell; the broach body can stretch out by pressing the first pressing block, the broach body can be retracted by pressing the second pressing block, frequent disassembly and assembly are not needed, and meanwhile stab injury to workers in the operation process can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth root canal treatment, in particular to an automatic pulp needle handle. Background Art

[0002] During root canal treatment of teeth, a pulp needle is often needed to extract the infected pulp of the tooth. The pulp needle is a medical tool used for puncturing and collecting bone marrow, usually made of metal, with a long tip and a slender body; the pulp needle is mainly used for bone marrow puncture to obtain bone marrow samples for disease diagnosis and treatment; the pulp needle handle currently used in clinical practice needs to be manually disassembled up and down, specifically, the needle bolt part is unscrewed, the pulp needle is installed and then screwed back; however, since the pulp needle is sharp and has barbs on the tip, needlestick injuries are prone to occur during this process; in view of this, the automatic pulp needle handle currently designed can reduce the risk of needlestick injuries and the workload of medical staff. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art and provides an automatic medullary needle handle.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An automatic medullary needle handle comprises a needle handle housing and further comprises:

[0006] A needle plug detachably connected to the bottom of the needle handle housing;

[0007] An annular plate slidably connected to the inside of the needle handle housing, wherein the annular plate is provided with a long groove;

[0008] A first clamping block fixedly connected to the inner wall of the needle handle housing is arranged in a ring shape, and a plurality of the first clamping blocks are provided;

[0009] A bidirectional screw rod is rotatably connected in the long slot;

[0010] Two second clamping blocks are slidably connected to the two ends of the long slot, respectively, and the first clamping block and the second clamping block are both provided with inclined surfaces matching each other;

[0011] The medullary needle body is arranged in the needle handle shell.

[0012] Preferably, a bidirectional screw rod is rotatably connected in the long groove, both ends of the bidirectional screw rod are threadedly connected with sliders, the bottoms of the two sliders are fixedly connected with connecting rods, and the two second clamping blocks are respectively fixedly connected to the two connecting rods.

[0013] Furthermore, the bottom of the annular plate is fixedly connected to a fixing seat, the top of the medullary needle body abuts against the fixing seat, the inner wall of the needle handle shell is fixedly connected to a circular plate, and a first spring is provided between the circular plate and the fixing seat.

[0014] Furthermore, a support frame is fixedly connected to the top of the annular plate, and a first pressing block is fixedly connected to the top of the support frame.

[0015] Furthermore, a gear is provided on the outer wall of the bidirectional screw rod, a rack plate matching the gear is slidably connected to the top of the needle handle housing, and a second pressing block is provided on the top of the rack plate.

[0016] Furthermore, a slide groove is provided on the support frame, a fixed block is fixedly connected to the outer wall of the rack plate, the fixed block is slidably connected in the slide groove, and a second spring is provided between the fixed block and the support frame.

[0017] Preferably, a connecting section is provided at the bottom of the needle handle housing, a cross groove and an external thread are provided on the connecting section, and the needle bolt is threadably connected to the external thread.

[0018] Furthermore, a protrusion is provided on the medullary needle body, and an elastic member is provided between the protrusion and the connecting section.

[0019] Compared with the prior art, the utility model provides an automatic medullary needle handle, which has the following beneficial effects:

[0020] 1. The automatic medullary needle handle can drive the second clamping block to move by pressing the first pressing block, so that it drives the medullary needle body to extend for use, and the second clamping block cooperates with the first clamping block to form a jam, limiting the medullary needle body, and the first clamping block is provided with multiple, which can adjust the extension length of the medullary needle body, suitable for use in different occasions.

[0021] 2. The automatic medullary needle handle can drive the two second clamping blocks to move relative to each other by pressing the second pressing block, thereby disengaging from the cooperation with the first clamping block, so that the annular plate can drive the medullary needle body to reset and shrink into the needle plug for protection. After releasing the second pressing block, the second clamping block will reset to the initial state, which is convenient for repeated use.

[0022] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. In the utility model, the medullary needle body can be extended by pressing the first pressing block, and the medullary needle body can be retracted by pressing the second pressing block. There is no need for frequent disassembly and installation, and at the same time, it can avoid punctures to workers during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of an automatic medullary needle handle proposed by the utility model;

[0024] Figure 2 This is a structural schematic diagram of a connecting section and a needle plug in an automatic medullary needle handle proposed by the utility model;

[0025] Figure 3 A cross-sectional schematic diagram of an automatic medullary needle proposed by the utility model;

[0026] Figure 4 It is a partial cross-sectional schematic diagram of a needle handle housing in an automatic medullary needle handle proposed by the utility model;

[0027] Figure 5 The utility model provides an automatic medullary needle handle Figure 4 A magnified schematic diagram of part A;

[0028] Figure 6 The utility model provides an automatic medullary needle handle Figure 4 Schematic diagram of the enlarged portion B.

[0029] In the figure: 1. needle handle housing; 101. connecting section; 102. cross groove; 103. external thread; 104. first clamping block; 2. needle bolt; 201. protrusion; 202. elastic member; 3. annular plate; 301. long groove; 302. bidirectional screw rod; 303. slider; 304. connecting rod; 305. second clamping block; 306. supporting frame; 307. first pressing block; 308. circular plate; 309. first spring; 310. sliding groove; 4. rack plate; 401. second pressing block; 402. fixing block; 403. second spring; 404. gear; 5. medullary needle body; 501. fixing seat. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] Reference Figure 1-Figure 6An automatic medullary needle handle comprises a needle handle housing 1, and also comprises a needle bolt 2 detachably connected to the bottom of the needle handle housing 1, an annular plate 3 is slidably connected inside the needle handle housing 1, and a long groove 301 is provided on the annular plate 3, a first clamping block 104 is fixedly connected to the inner wall of the needle handle housing 1, the first clamping block 104 is arranged in an annular shape, and the first clamping block 104 is provided with a plurality of, a bidirectional screw rod 302 is rotatably connected in the long groove 301, and two second clamping blocks 305 are slidably connected to the two ends of the long groove 301, respectively, and the first clamping block 104 and the second clamping block 305 are provided with mutually matching inclined surfaces; a medullary needle body 5 is arranged in the needle handle housing 1.

[0033] When the first pressing block 307 is pressed, the support frame 306 is pushed to move, thereby driving the annular plate 3 to slide in the needle handle housing 1, so that the second clamping block 305 at the bottom of the annular plate 3 moves. Then, the inclined surface on the second clamping block 305 contacts the inclined surface on the first clamping block 104, and the second clamping block 305 and the connecting rod 304 are both made of plastic. Therefore, when the inclined surface on the second clamping block 305 contacts and abuts against the inclined surface on the first clamping block 104, the second clamping block 305 will produce an inward deformation, so that the second clamping block 305 moves to the bottom of the first clamping block 104. At this time, the planes on the first clamping block 305 and the second clamping block 104 will abut against each other, forming a stuck state, and at the same time, the medullary needle body 5 can be extended and put into use.

[0034] In addition, the first clamping block 104 in the utility model is provided with multiple ones. By continuously pressing the first pressing block 307 downward so that the second clamping block 305 cooperates with different first clamping blocks 104, the length of the extension of the medullary needle body 5 can be synchronously adjusted. Specifically, a protrusion 201 is provided on the medullary needle body 5, and an elastic member 202 is provided between the protrusion 201 and the connecting section 101. When the medullary needle body 5 is extended downward, the protrusion 201 will be driven to move downward, and the elastic member 202 will be compressed at the same time. The compressed elastic member 202 can make the medullary needle body 5 retract into the needle plug 2 when resetting, so as to protect the medullary needle body 5. Specifically, the elastic member 202 can be set as a spring, which is sleeved on the outer wall of the medullary needle body 5, and the protrusion 201 and the medullary needle body 5 can be fixed by sleeve connection.

[0035] A bidirectional screw rod 302 is rotatably connected in the long slot 301 , and sliders 303 are threadedly connected to both ends of the bidirectional screw rod 302 . Connecting rods 304 are fixedly connected to the bottoms of the two sliders 303 , and two second clamping blocks 305 are fixedly connected to the two connecting rods 304 , respectively.

[0036] The bottom of the annular plate 3 is fixedly connected with a fixing seat 501 , the top of the medullary needle body 5 abuts against the fixing seat 501 , the inner wall of the needle handle housing 1 is fixedly connected with a circular plate 308 , and a first spring 309 is provided between the circular plate 308 and the fixing seat 501 .

[0037] A gear 404 is disposed on the outer wall of the bidirectional screw rod 302 , a rack plate 4 matching the gear 404 is slidably connected to the top of the needle handle housing 1 , and a second pressing block 401 is disposed on the top of the rack plate 4 .

[0038] A slide groove 310 is provided on the support frame 306 , a fixing block 402 is fixedly connected to the outer wall of the rack plate 4 , the fixing block 402 is slidably connected in the slide groove 310 , and a second spring 403 is provided between the fixing block 402 and the support frame 306 .

[0039] When the second pressing block 401 is released, the second pressing block 401 is automatically reset and the gear 404 is reversed, so that the two sliders 303 drive the second clamping block 305 to move to the initial position, which is convenient for repeated use. The elastic force of the first spring 309 is greater than the elastic force of the second spring 403, which is convenient for use. Figure 5 A limit rod is provided in the long groove 301 to prevent the slider 303 from rotating when it is threadedly connected with the bidirectional screw rod 302.

[0040] A connecting section 101 is provided at the bottom of the needle handle housing 1, and a cross groove 102 and an external thread 103 are provided on the connecting section 101. The needle bolt 2 is threadedly connected to the external thread 103, which can make the needle bolt 2 easy to disassemble. The cross groove 102 does not affect the effect of the threaded connection, and at the same time, it can make the medullary needle body 5 easy to disassemble.

[0041] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An automatic medullary needle handle, comprising a needle handle housing (1), characterized in that: Also includes: A needle bolt (2) detachably connected to the bottom of the needle handle housing (1); An annular plate (3) slidably connected to the inside of the needle handle housing (1), wherein the annular plate (3) is provided with a long groove (301); A first clamping block (104) fixedly connected to the inner wall of the needle handle housing (1) is arranged in a ring shape, and a plurality of the first clamping blocks (104) are provided; A bidirectional screw rod (302) is rotatably connected in the long slot (301); Two second clamping blocks (305) are slidably connected to the two ends of the long slot (301), respectively, and the first clamping block (104) and the second clamping block (305) are both provided with inclined surfaces that match each other; The medullary needle body (5) is arranged in the needle handle housing (1).

2. The automatic medullary needle handle according to claim 1, characterized in that: A bidirectional screw rod (302) is rotatably connected in the long slot (301), both ends of the bidirectional screw rod (302) are threadedly connected to sliders (303), the bottoms of the two sliders (303) are fixedly connected to connecting rods (304), and the two second clamping blocks (305) are respectively fixedly connected to the two connecting rods (304).

3. The automatic medullary needle handle according to claim 2, characterized in that: The bottom of the annular plate (3) is fixedly connected to a fixing seat (501), the top of the medullary needle body (5) abuts against the fixing seat (501), the inner wall of the needle handle housing (1) is fixedly connected to a circular plate (308), and a first spring (309) is provided between the circular plate (308) and the fixing seat (501).

4. The automatic medullary needle handle according to claim 3, characterized in that: The top of the annular plate (3) is fixedly connected to a support frame (306), and the top of the support frame (306) is fixedly connected to a first pressing block (307).

5. The automatic medullary needle handle according to claim 4, characterized in that: A gear (404) is provided on the outer wall of the bidirectional screw rod (302), and a rack plate (4) matching with the gear (404) is slidably connected to the top of the needle handle housing (1), and a second pressing block (401) is provided on the top of the rack plate (4).

6. The automatic medullary needle handle according to claim 5, characterized in that: The support frame (306) is provided with a slide groove (310), the outer wall of the rack plate (4) is fixedly connected with a fixed block (402), the fixed block (402) is slidably connected in the slide groove (310), and a second spring (403) is provided between the fixed block (402) and the support frame (306).

7. The automatic medullary needle handle according to claim 1, characterized in that: The bottom of the needle handle housing (1) is provided with a connecting section (101), the connecting section (101) is provided with a cross groove (102) and an external thread (103), and the needle bolt (2) is threadably connected to the external thread (103).

8. The automatic medullary needle handle according to claim 7, characterized in that: The medullary needle body (5) is provided with a protrusion (201), and an elastic member (202) is provided between the protrusion (201) and the connecting section (101).

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