Press type parallel connector

Abstract

The utility model discloses a push type parallel connector, which comprises two connecting main bodies and a connecting shaft, the two connecting main bodies are respectively connected with two ends of the connecting shaft, at least one connecting main body is rotatably connected with the connecting shaft and can axially rotate by 360 degrees relative to the connecting shaft, two clamping arms are arranged at the lower parts of the connecting main bodies, and the two clamping arms are connected with the connecting shaft. The space between the two clamping arms forms a clamping space used for clamping a connecting rod, and the connecting rod is configured to be squeezed into the clamping space through pressing from an opening between the lower ends of the two clamping arms. And an anti-dropping effect for preventing the connecting rod from axially dropping out of the clamping space is generated through mutual friction between the surface of the connecting rod and the inner wall of the clamping space. According to the parallel connector, the connecting rod can be squeezed into the clamping space of the connecting main body in a pressing mode to be clamped and fixed, the assembling mode can subvert the surgical operation step that an existing parallel connector and an existing connecting rod need to be assembled in advance, and the assembling sequence of the parallel connector does not need to be considered.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a pressing type parallel connector. Background Art

[0002] There is a prior spinal nail-rod system assembly including pedicle screws, connecting rods, end caps and parallel connectors. During the operation, the operator first passes the parallel connector through the connecting rod, and then places the connecting rod in the U-shaped groove of the pedicle screw and sequentially tightens the end cap. The combination of the pedicle screw, the parallel connector and the connecting rod is fixed to achieve the stable effect of the spinal surgery segment area. The traditional matching method between the parallel connector and the connecting rod is to use a nut for fixation. During the operation, the operator has to consider the placement position, assemble the parallel connector and the connecting rod in advance, and temporarily fix the nut on the connecting rod. However, the temporary fixation will reduce the operation space during the operation, block the line of sight, and there is also a risk of nut detachment. The overall supporting instruments are cumbersome to operate, increasing the operation steps during the operation and affecting the overall operation efficiency. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a pressing type parallel connector. The connecting rod can be pressed and squeezed into the clamping space through the opening between the lower ends of the two clamping arms of the connecting body during the operation to achieve the assembly connection, and its installation process is convenient and fast.

[0004] To achieve the above object, the utility model is realized through the following technical solutions:

[0005] A pressing type parallel connector includes two connecting bodies and a connecting shaft. The two connecting bodies are respectively connected to the two ends of the connecting shaft. At least one connecting body is rotationally connected to the connecting shaft and can rotate axially 360° relative to the connecting shaft. Two oppositely arranged clamping arms are provided at the lower part of the connecting body. The space between the two clamping arms forms a clamping space for clamping the connecting rod. The connecting rod is configured to be pressed and squeezed into the clamping space through the opening between the lower ends of the two clamping arms, and the anti-detachment effect for preventing the connecting rod from axially disengaging from the clamping space is generated by the mutual friction between the surface of the connecting rod and the inner wall of the clamping space.

[0006] Further, the axial disengagement force of the connecting rod relative to the clamping space is configured to reach 25 N·m to 35 N·m.

[0007] Further, the axial disengagement force of the connecting rod relative to the clamping space is configured to reach 30 N·m.

[0008] Further, limiting ribs for limiting the connecting rod in the clamping space are provided on the inner side walls of the two clamping arms of the connecting body.

[0009] Further, at least one fastening rib for improving the clamping stability of the connecting rod in the clamping space is formed on the top inner wall of the clamping space.

[0010] Further, the fastening rib has a sharp structure.

[0011] Further, two fastening ribs are symmetrically arranged on the top inner wall of the clamping space.

[0012] Further, one of the two connecting bodies is provided with a shaft hole. One end of the connecting shaft is configured to be adaptively inserted into the shaft hole to form a rotational connection with the connecting body. An annular limiting groove is formed on the connecting shaft, and a limiting pin that cooperates with the annular limiting groove to prevent the connecting shaft from withdrawing from the shaft hole is installed on the connecting body. The other end of the connecting shaft is integrally connected to the other of the two connecting bodies.

[0013] Further, two annular limiting grooves are formed on the connecting shaft, and two limiting pins that respectively cooperate with the two annular limiting grooves on the connecting shaft are installed on the connecting body.

[0014] Further, the connecting body, the connecting shaft, and the limiting pin are made of titanium alloy material, namely, a connecting body made of titanium alloy material, a connecting shaft made of titanium alloy material, and a limiting pin made of titanium alloy material.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the push-type parallel connector of the present utility model, the two connecting bodies are connected together by the connecting shaft and can rotate relative to each other. At the same time, two oppositely arranged clamping arms are provided at the lower part of the connecting body, and the space between the two clamping arms forms a clamping space for clamping the connecting rod, so that the connecting rod to be assembled can be clamped and fixed by being squeezed into the clamping space of the connecting body by pressing. Such an assembly method can subvert the existing surgical operation steps in which the parallel connector and the connecting rod need to be assembled in advance, without considering the assembly sequence of the parallel connector, enabling the surgeon to choose whether to install the parallel connector between the two connecting rods according to actual needs during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view of the parallel connector according to the embodiment of the present utility model.

[0018] Figure 2 is the exploded perspective view of the parallel connector according to the embodiment of the present utility model.

[0019] Figure 3 is the assembly structure diagram of the parallel connector and the connecting rod according to the embodiment of the present utility model.

[0020] Figure 4It is a cross-sectional view of the assembly structure of the parallel connector and the connecting rod in the embodiment of the present utility model.

[0021] Figure 5 It is a schematic diagram of the usage state of the parallel connector in the embodiment of the present utility model.

[0022] Label description:

[0023] 1. Connection main body, 2. Connection shaft, 3. Limit pin, 4. Connecting rod, 11. Clamping arm, 12. Limit rib, 13. Fastening rib, 21. Annular limit groove. Specific implementation manner

[0024] The present utility model will be further described below with reference to the drawings and embodiments.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] Please refer to the attached Figure 1 to the attached Figure 5 As shown in the drawings, an embodiment of the present utility model provides a push-button parallel connector, which includes two connection main bodies 1 and a connection shaft 2. The two connection main bodies 1 are respectively connected to both ends of the connection shaft 2. At least one connection main body 1 is rotatably connected to the connection shaft 2 and can rotate axially 360° relative to the connection shaft 2. Two relatively arranged clamping arms 11 are provided at the lower part of the connection main body 1. The space between the two clamping arms 11 forms a clamping space for clamping the connecting rod 4. The connecting rod 4 is configured to be squeezed into the clamping space through the opening between the lower ends of the two clamping arms 11 by pressing, and an anti-detachment effect for preventing the connecting rod 4 from axially detaching from the clamping space is generated by the mutual friction between the surface of the connecting rod 4 and the inner wall of the clamping space. It can be understood that in this embodiment, the two connection main bodies 1 are connected together by the connection shaft 2 and can rotate relative to each other. At the same time, two relatively arranged clamping arms 11 are provided at the lower part of the connection main body 1. The space between the two clamping arms 11 forms a clamping space for clamping the connecting rod 4, so that the connecting rod 4 to be assembled can be squeezed into the clamping space of the connection main body 1 by pressing and clamped and fixed. Such an assembly method can subvert the surgical operation steps in which the existing parallel connector and the connecting rod need to be assembled in advance, without considering the assembly sequence of the parallel connector, so that the surgeon can also choose whether to install a parallel connector between the two connecting rods 4 according to actual needs during the operation.

[0027] Please refer to the attached Figure 1 to the attached Figure 5 In one preferred embodiment, the disengaging force of the connecting rod 4 relative to the clamping space is configured to reach 25 N·m to 35 N·m. Preferably, the disengaging force of the connecting rod 4 relative to the clamping space is configured to reach 30 N·m. In this embodiment, an elastic clamping connection without a nut is adopted between the connecting body 1 and the connecting rod 4, and its disengaging force can be designed to reach 30 N·m, which can exceed the torque value of the existing conventional nut locking. When the nut locking fails in the existing nut locking connection method, the connecting rod 4 will fall off from the connecting body. However, in this embodiment, even if the connection between the connecting body 1 and the connecting rod 4 fails, the connecting rod 4 will only rotate idly relative to the connecting body and is not likely to directly fall out of the clamping space of the connecting body.

[0028] Please refer to the attached Figure 1 to the attached Figure 5 In one preferred embodiment, limiting ribs 12 for limiting the connecting rod 4 within the clamping space are provided on the inner side walls of the two clamping arms 11 of the connecting body 1.

[0029] Please refer to the attached Figure 1 to the attached Figure 5 In one preferred embodiment, at least one fastening rib 13 for improving the clamping stability of the connecting rod 4 in the clamping space is formed on the top inner wall of the clamping space. Further, the fastening rib 13 has a sharp structure. In this way, the connecting rod 4 can be more stably clamped and fixed in the clamping space of the connecting body 1.

[0030] Please refer to the attached Figure 1 to the attached Figure 5 In one preferred embodiment, two fastening ribs 13 are symmetrically provided on the top inner wall of the clamping space. However, those skilled in the art should understand that in other embodiments, other numbers of fastening ribs 13 can also be provided at other positions on the inner wall of the clamping space, which is not limited to the specific implementation disclosed in this embodiment, and those skilled in the art can set it specifically according to specific needs.

[0031] Please refer to the attached Figure 1 to the attached Figure 5 In one preferred embodiment, one of the two connecting bodies 1 is provided with a shaft hole, one end of the connecting shaft 2 is configured to be inserted into the shaft hole to form a rotational connection with the connecting body 1, and an annular limiting groove 21 is provided on the connecting shaft 2. A limiting pin 3 that cooperates with the annular limiting groove 21 to prevent the connecting shaft 2 from withdrawing from the shaft hole is installed on the connecting body 1, and the other end of the connecting shaft 2 is integrally connected to the other of the two connecting bodies 1. In addition, it can be understood that in this embodiment, the overall incision of this parallel connector is low, which is beneficial to the postoperative recovery of patients.

[0032] Please refer to the attached Figure 1 to the attached Figure 5 , in a preferred embodiment, two annular limiting grooves 21 are formed on the connecting shaft 2, and two limiting pins 3 are installed on the connecting body 1 and are respectively matched with the two annular limiting grooves 21 on the connecting shaft 2. Preferably, the connecting body 1, the connecting shaft 2 and the limiting pins 3 are made of titanium alloy, the connecting body is made of titanium alloy, the connecting shaft is made of titanium alloy, and the limiting pins are made of titanium alloy.

[0033] As mentioned above, the embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; 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 of the technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Claims

1. A push-type parallel connector, characterized in that: The invention comprises two connecting bodies (1) and a connecting shaft (2), wherein the two connecting bodies (1) are respectively connected to the two ends of the connecting shaft (2), at least one connecting body (1) is rotatably connected to the connecting shaft (2) and can axially rotate 360 ​​degrees relative to the connecting shaft (2), two clamping arms (11) arranged opposite to each other are provided at the lower part of the connecting body (1), the space between the two clamping arms (11) forms a clamping space for clamping a connecting rod (4), the connecting rod (4) is configured to be squeezed into the clamping space from an opening between the lower ends of the two clamping arms (11) by pressing, and an anti-slip effect is generated by mutual friction between the surface of the connecting rod (4) and the inner wall of the clamping space to prevent the connecting rod (4) from axially slipping out of the clamping space.

2. The push-type parallel connector according to claim 1, characterized in that: The ejection force of the connecting rod (4) relative to the clamping space is configured to reach 25N·m to 35N·m.

3. The push-type parallel connector according to claim 2, characterized in that: The ejection force of the connecting rod (4) relative to the clamping space is configured to reach 30 N·m.

4. The push-type parallel connector according to claim 1, characterized in that: The inner side walls of the two clamping arms (11) on the connecting body (1) are provided with limiting convex ribs (12) for limiting the connecting rod (4) in the clamping space.

5. The push-type parallel connector according to claim 1, characterized in that: At least one fastening rib (13) is formed on the top inner wall of the clamping space for improving the clamping stability of the connecting rod (4) in the clamping space.

6. The push-type parallel connector according to claim 5, characterized in that: The fastening rib (13) is a sharp structure.

7. The push-type parallel connector according to claim 5, characterized in that: Two fastening ribs (13) are symmetrically arranged on the top inner wall of the clamping space.

8. The push-type parallel connector according to any one of claims 1 to 7, characterized in that: One of the two connecting bodies (1) is provided with an axial hole, one end of the connecting shaft (2) is configured to be adapted to be inserted into the axial hole and to form a rotational connection with the connecting body (1), and an annular limiting groove (21) is provided on the connecting shaft (2), and a limiting pin (3) is installed on the connecting body (1) to cooperate with the annular limiting groove (21) to prevent the connecting shaft (2) from withdrawing from the axial hole, and the other end of the connecting shaft (2) is an integrally connected structure with the other of the two connecting bodies (1).

9. The push-type parallel connector according to claim 8, characterized in that: Two annular limiting grooves (21) are provided on the connecting shaft (2), and two limiting pins (3) respectively cooperating with the two annular limiting grooves (21) on the connecting shaft (2) are installed on the connecting body (1).

10. The push-type parallel connector according to claim 8, characterized in that: The connecting body (1), the connecting shaft (2) and the limiting pin (3) are made of a titanium alloy.

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