Fracture steel plate clamping forceps

Abstract

The utility model provides a pair of fracture steel plate clamping forceps, which relates to the field of clamping and fixing instruments used in orthopedic surgery, and comprises a main rod piece and an auxiliary rod piece, the front end of the main rod piece is provided with a first claw, and the front end of the auxiliary rod piece is provided with a second claw; a clamping area is formed between the first claw and the second claw; the first claw and the second claw are arranged in parallel, the auxiliary rod piece is slidably connected to the main rod piece in the length direction of the main rod piece, the main rod piece is in threaded connection with a screw, the end of the screw is rotationally connected to the auxiliary rod piece, and the screw rotates to push the auxiliary rod piece. Therefore, the first claw and the second claw are finally fixedly clamped on the skeleton. The bone clamping device has the advantages that the first claw and the second claw are arranged in parallel, the auxiliary rod piece slides in the length direction of the main rod piece so as to control the first claw and the second claw to be opened and closed, the structure enables the clamping area to be large, the bone clamping device can be used for clamping bones with different thicknesses, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of clamping and fixing instruments used in orthopedic surgery, in particular to a fracture plate clamping pliers. Background Art

[0002] A fracture refers to an interruption in the integrity or continuity of a bone, often caused by various violent injuries, but can also be caused by bone diseases. Fractures can occur in one location or can be multiple throughout the body. After a fracture occurs, it can be fixed and treated with an orthopedic plate. Clinically, orthopedic surgeons need to use a medical device to clamp and fix the plate when installing it during fracture surgery. Fracture plate clamps are used clinically as an auxiliary tool for orthopedic surgery, mainly for clamping implants, instruments, or tissues, and are removed after the internal fixation surgery is completed. Fracture plate clamps are usually made of stainless steel, titanium alloy, or polymer materials.

[0003] Currently, a patent for fracture plate clamping pliers has been published. Patent publication number CN2367261Y discloses a new four-claw clamp. The specific principle of this four-claw clamp is: the overall structure is clamp-shaped; the upper and lower clamp heads are double-clawed, and the two parts of each claw are arranged in parallel, with one pair of long claws and one pair of short claws; the distance between the two parts of the longer pair is long, and the distance between the two claws of the shorter pair is short; a groove is opened in the middle part of the shorter pair of claws, which is specifically used to clamp the steel plate to prevent the steel plate from slipping; a long screw is strung on the two clamp handles, which can be used to clamp the clamp head.

[0004] However, this type of clamp has certain defects when used. First, the opening and closing principle of this type of clamp is similar to that of scissors. The long claws and the short claws are hinged, which results in a certain limitation on the opening angle of the clamp. That is, the opening angle is not very large, and thus it is not suitable for clamping people with thicker bones. Second, when this clamp is fixed on the bone, the handle is in a horizontal position. Therefore, during the operation, medical staff can easily touch the handle when walking, thereby affecting the fixation of the steel plate.

[0005] Based on this, it is necessary to disclose a fracture plate clamping pliers to overcome the above technical defects. Utility Model Content

[0006] The utility model overcomes the shortcomings of the prior art and provides a fracture plate clamping pliers with wide applicability and convenient operation.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The fracture plate clamp comprises a main rod and a secondary rod, wherein a first claw is provided at the front end of the main rod, and a second claw is provided at the front end of the secondary rod; a clamping area is formed between the first claw and the second claw; the first claw and the second claw are arranged parallel to each other, and when viewed from one side in the length direction of the main rod, the first claw and the second claw are staggered; the secondary rod is slidably connected to the main rod along the length direction of the main rod, and a screw is threaded on the main rod, and the end of the screw is rotatably connected to the secondary rod, and the rotation of the screw will push the secondary rod so that the first claw and the second claw are finally fixedly clamped on the bone.

[0009] Furthermore, a guide groove is provided on the main rod, and the length direction of the guide groove is the same as the length direction of the main rod; the top of the auxiliary rod is connected to a sliding member, which is slidably arranged in the guide groove; the top of the sliding member is connected to a limiting member for limiting the separation of the auxiliary rod and the main rod.

[0010] Furthermore, the sliding member is cylindrical, and the height dimension of the sliding member protruding from the surface of the secondary rod is greater than the depth dimension of the guide groove; the limiting member is rectangular, the width dimension of the limiting member is smaller than the width dimension of the guide groove, and the length dimension of the limiting member is greater than the width dimension of the guide groove.

[0011] Furthermore, the inner side surfaces of the first claw and the second claw are both provided with corrugated surfaces, so as to increase the friction force in the part of the bone that is in contact with the inner side surfaces.

[0012] Furthermore, the screw rod and the auxiliary rod are detachably connected; a concave hole is provided on the auxiliary rod, and a columnar component corresponding to the concave hole is connected to the end of the screw rod close to the auxiliary rod, and the columnar component is inserted and assembled in the concave hole; a disc is connected to the end of the screw rod away from the auxiliary rod.

[0013] Furthermore, a recessed position is formed in the middle of the columnar component; a threaded hole is provided on the secondary rod, the center line of the threaded hole and the center line of the recessed hole are perpendicular to each other, and the threaded hole and the recessed hole are connected; a locking screw is threadedly connected in the threaded hole, and the locking screw corresponds to the recessed position.

[0014] Furthermore, the end of the first claw is formed with a downwardly inclined angled surface.

[0015] Furthermore, the length of the guide groove is one half to two thirds of the length of the main rod.

[0016] Furthermore, if the number of the second claws is set to N, then the number of the first claws is N+1.

[0017] Furthermore, the first claw is arranged perpendicular to the shaft of the main rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The front end of the main rod of the utility model is provided with a first claw, and the front end of the auxiliary rod is provided with a second claw. The first claw and the second claw are arranged parallel to each other, and the auxiliary rod slides along the length direction of the main rod to control the opening and closing of the first claw and the second claw. This structure makes the clamping area large and can be used to clamp bones of different thicknesses. It has wide applicability and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a three-dimensional fracture plate clamping pliers according to the embodiment of the utility model. Figure 1 ;

[0022] Figure 2 It is a three-dimensional fracture plate clamping pliers according to the embodiment of the utility model. Figure 2 ;

[0023] Figure 3 This is an exploded schematic diagram of the fracture plate clamping pliers according to an embodiment of the present utility model;

[0024] Figure 4 It is a three-dimensional diagram of the auxiliary rod member according to the embodiment of the present utility model;

[0025] Figure 5 It is a three-dimensional diagram of another embodiment of the main rod member described in the embodiment of the utility model.

[0026] In the picture:

[0027] 1. Main rod; 101. First claw; 1011. Bevel surface; 102. Guide groove; 2. Auxiliary rod; 201. Second claw; 202. Sliding member; 203. Limiting member; 204. Concave hole; 205. Threaded hole; 3. Screw; 4. Corrugated surface; 5. Columnar member; 501. Recessed position; 6. Disc; 7. Locking screw. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0029] like Figures 1 to 4As shown, the utility model claims protection for a fracture plate clamping pliers, including a main rod 1 and a sub-rod 2, the sub-rod 2 is slidably connected to the main rod 1 along the length direction of the main rod 1; and the front end of the main rod 1 is provided with a first claw 101, and the front end of the sub-rod 2 is provided with a second claw 201; a clamping area is formed between the first claw 101 and the second claw 201, and the part of the bone where the steel plate is placed is placed into the clamping area, and the first claw 101 and the second claw 201 are brought close to each other to narrow the clamping area until it is clamped on the bone. In this embodiment, the first claw 101 and the second claw 201 are arranged parallel to each other, so that they can clamp on both sides of the bone smoothly, and the clamping effect is good; and viewed from one side of the length direction of the main rod 1, the first claw 101 and the second claw 201 are staggered, that is, in Figure 1 In the state shown, the first claw 101 and the second claw 201 are misaligned when viewed from above, which helps to increase the length margin of the first claw 101 and the second claw 201 clamping on the bone and improve the stability of the clamping.

[0030] The main rod 1 is threadedly connected to a screw rod 3, the end of which is rotatably connected to the auxiliary rod 2. The screw rod 3 and the auxiliary rod 2 are detachably connected, and this detachable arrangement facilitates the installation of the auxiliary rod 2 on the main rod 1. A guide groove 102 is provided on the main rod 1, and the length direction of the guide groove 102 is the same as the length direction of the main rod 1; a sliding member 202 is connected to the top of the auxiliary rod 2, and the sliding member 202 is slidably arranged in the guide groove 102. In this embodiment, the sliding member 202 is cylindrical, that is, the sliding member 202 has a round side wall, which facilitates the sliding member 202 to slide more smoothly in the guide groove 102; the top of the sliding member 202 is connected to a limiter 203 for limiting the automatic separation of the auxiliary rod 2 and the main rod 1.

[0031] Specifically, combined Figure 2 as well as Figure 4 The limiting member 203 is a rectangular parallelepiped. The width of the limiting member 203 is smaller than the width of the guide slot 102, and the length of the limiting member 203 is larger than the width of the guide slot 102 (in units of 1 / 4). Figure 4 For example, the side line on the limiter 203 that is in the same direction as the length direction of the secondary rod 2 is used as the width, and the side line on the limiter 203 that is perpendicular to the length direction of the secondary rod 2 is used as the length); the above setting is intended to be used when the secondary rod 2 is assembled on the main rod 1. Figure 4 The auxiliary rod 2 is rotated 90 degrees to allow the limiting member 203 to be embedded in the guide groove 102 in an upright state, and then rotated back 90 degrees to allow the limiting member 203 to rotate back to the position shown in FIG. Figure 2In the horizontal state shown, the length direction of the limit member 203 is perpendicular to the length direction of the guide groove 102. Because the length dimension of the limit member 203 is greater than the width dimension of the guide groove 102, the limit is achieved. Therefore, when the auxiliary rod 2 slides along the guide groove 102 of the main rod 1, the auxiliary rod 2 will not loosen from the main rod 1.

[0032] A recessed hole 204 is provided on the auxiliary rod 2, and a columnar component 5 corresponding to the recessed hole 204 is connected to the end of the screw rod 3 close to the auxiliary rod 2, and the columnar component 5 is connected and fixed to the screw rod 3, and the columnar component 5 is inserted and assembled in the recessed hole 204; a disc 6 is connected to the end of the screw rod 3 away from the auxiliary rod 2, and the handheld disc 6 is rotated to control the rotation of the screw rod 3; because when the first claw 101 and the second claw 201 are close to each other and clamped, the rotation of the disc 6 is controlled to drive the screw rod 3 to move relative to the main rod 1 to push the auxiliary rod 2 forward, and the rotation of the screw rod 3 will push the auxiliary rod 2, so that the first claw 101 and the second claw 201 are finally fixed and clamped on the bone.

[0033] The height dimension of the sliding member 202 protruding from the surface of the auxiliary rod 2 is greater than the depth dimension of the guide groove 102, that is, there is a certain gap between the side of the limiting member 203 facing the sliding member 202 and the side of the main rod 1 facing the limiting member 203, that is, the limiting member 203 and the main rod 1 are not tightly pressed, so that the auxiliary rod 2 can slide smoothly on the main rod 1.

[0034] The inner side surfaces of the first claw 101 and the second claw 201 are both provided with a corrugated surface 4 to increase the friction in the part of the bone that is in contact with the inner side surface. That is, when the first claw 101 and the second claw 201 are clamped together with the bone and the steel plate, a fairly stable temporary fixation is achieved.

[0035] A recessed position 501 is formed in the middle of the columnar component 5; a threaded hole 205 is provided on the auxiliary rod 2, the center line of the threaded hole 205 is perpendicular to the center line of the recessed hole 204, and the threaded hole 205 is connected to the recessed hole 204; a locking screw 7 is threadedly connected in the threaded hole 205, and the locking screw 7 corresponds to the recessed position 501; when the screw 3 is tightened to clamp the first claw 101 and the second claw 201 to the bone, the screw 3 needs to be fixed to prevent loosening, so the locking screw 7 is screwed into the threaded hole 205 until the inner end of the locking screw 7 is tightened to the recessed position 501, thereby locking the columnar component 5 and the screw 3 will not move on its own; when the screw 3 needs to be loosened after the operation, the locking screw 7 can be loosened. The center line of the threaded hole 205 and the center line of the recessed hole 204 are perpendicular to each other. This design allows the locking screw 7 to be vertically and laterally pressed into the recessed position 501, resulting in a good pressing effect.

[0036] The length of the guide slot 102 is one-half to two-thirds of the length of the main rod 1. This design allows the first claw 101 and the second claw 201 to have a larger opening and closing distance, which can basically meet the clamping requirements of most bones.

[0037] If the number of the second claws 201 is N, then the number of the first claws 101 is N+1; Figure 1 As shown, the number of the second claws 201 is 2, and the number of the first claws 101 is 3; Figure 5 This is a perspective view of another embodiment of the main rod 1. In this embodiment, the number of the first claws 101 is 2, and the number of the second claw 201 in the corresponding auxiliary rod 2 is 1. Figure 1 The vertical state shown is inserted horizontally into the bone, and then the screw 3 is tightened to move the second claw 201 downward to clamp. Therefore, the first claw 101 is located at the lower part of the bone. The design of more first claws 101 than second claws 201 helps to maintain a stable center of gravity. Figure 5 As shown, as a further optimization, the end of the first claw 101 is formed with a downwardly inclined beveled surface 1011. The purpose of this design is that when the fracture is exposed, when the fracture plate clamp is inserted horizontally into the bone, the design of the beveled surface 1011 can improve the smoothness of the insertion of the fracture plate clamp; in addition, the first claw 101 is arranged perpendicular to the rod body of the main rod 1, so when the fracture plate clamp is clamped on the bone for surgery, if the bottom surface of the first claw 101 is placed on the operating table as a support surface, the rod body of the main rod 1 extends upward, and it is not easy for medical staff to touch it when walking.

[0038] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Fracture plate clamping pliers, characterized by: The invention comprises a main rod (1) and a sub-rod (2), wherein the front end of the main rod (1) is provided with a first claw (101), and the front end of the sub-rod (2) is provided with a second claw (201); a clamping area is formed between the first claw (101) and the second claw (201); the first claw (101) and the second claw (201) are arranged in parallel with each other, and when viewed from one side in the length direction of the main rod (1), the first claw (101) and the second claw (201) are arranged in a staggered manner; the sub-rod (2) is connected to the main rod (1) in a sliding manner along the length direction of the main rod (1); a screw (3) is threadedly connected to the main rod (1), and the end of the screw (3) is rotatably connected to the sub-rod (2); the rotation of the screw (3) pushes the sub-rod (2) so that the first claw (101) and the second claw (201) are finally fixedly clamped on the bone.

2. The fracture plate clamp according to claim 1, characterized in that: The main rod (1) is provided with a guide groove (102), and the length direction of the guide groove (102) is the same as the length direction of the main rod (1); the top of the auxiliary rod (2) is connected to a sliding member (202), and the sliding member (202) is slidably arranged in the guide groove (102); the top of the sliding member (202) is connected to a limiting member (203) for limiting the auxiliary rod (2) and the main rod (1) from separating on their own.

3. The fracture plate clamp according to claim 2, characterized in that: The sliding member (202) is cylindrical, and the height dimension of the sliding member (202) protruding from the surface of the secondary rod member (2) is greater than the depth dimension of the guide groove (102); the limiting member (203) is rectangular, and the width dimension of the limiting member (203) is smaller than the width dimension of the guide groove (102), and the length dimension of the limiting member (203) is greater than the width dimension of the guide groove (102).

4. The fracture plate clamp according to any one of claims 1 to 3, characterized in that: The inner side surfaces of the first claw (101) and the second claw (201) are both provided with a corrugated surface (4) to facilitate increasing the friction force in the portion of the bone that is in contact with the inner side surface.

5. The fracture plate clamp according to claim 4, characterized in that: The screw rod (3) and the auxiliary rod (2) are detachably connected; a concave hole (204) is provided on the auxiliary rod (2); an end of the screw rod (3) close to the auxiliary rod (2) is connected to a columnar component (5) corresponding to the concave hole (204); the columnar component (5) is inserted and assembled in the concave hole (204); and an end of the screw rod (3) away from the auxiliary rod (2) is connected to a disc (6).

6. The fracture plate clamp according to claim 5, characterized in that: A recessed position (501) is formed in the middle of the columnar component (5); a threaded hole (205) is provided on the auxiliary rod (2), the center line of the threaded hole (205) and the center line of the recessed hole (204) are perpendicular to each other, and the threaded hole (205) and the recessed hole (204) are connected; a locking screw (7) is threadedly connected in the threaded hole (205), and the locking screw (7) corresponds to the recessed position (501).

7. The fracture plate clamp according to claim 1, characterized in that: The end of the first claw (101) is formed with a downwardly inclined bevel surface (1011).

8. The fracture plate clamp according to claim 2, characterized in that: The length of the guide groove (102) is one-half to two-thirds of the length of the main rod (1).

9. The fracture plate clamp according to claim 1, characterized in that: If the number of the second claws (201) is N, then the number of the first claws (101) is N+1.

10. The fracture plate clamp according to claim 1, characterized in that: The first claw (101) is arranged perpendicular to the shaft of the main rod (1).

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