Compression forceps having steplessly adjustable width
By using a stepless adjuster and a threaded rod slider structure, the problem of limited clamping range in existing pressure clamps is solved, achieving stepless and flexible width adjustment, suitable for various clamping scenarios.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DECANS MEDICAL DEVICES CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-06-11
AI Technical Summary
Existing clamping clamps have limited clamping range, cannot achieve stepless adjustment, and the adjustment width is not flexible enough.
A stepless adjuster was designed, which uses a first and second clamp arranged in a cross pattern to achieve stepless adjustment of the clamping range by utilizing the cooperation of a threaded rod and a slider, and can be precisely adjusted by a knob and a rack and pinion structure.
It achieves applicability to various clamping scenarios and flexible width adjustment, with a novel structure, convenient use, and complete functions.
Smart Images
Figure CN2025089061_11062026_PF_FP_ABST
Abstract
Description
Infinitely adjustable width clamp
[0001] This patent application claims priority to the following Chinese patent application:
[0002] Submission Date: December 2, 2024; Application Number: 2024117515066; Invention Title: Pressure Clamp with Stepless Width Adjustment;
[0003] The full text of the above application is incorporated herein by reference. Technical Field
[0004] This invention relates to the field of medical device technology, and more specifically, to a pressure clamp with infinitely adjustable width. Background Technology
[0005] In recent years, with the continuous improvement of orthopedic instruments and surgical techniques, existing compression forceps, used in surgeries requiring stable pressure such as fracture fixation, spinal correction, and fracture end alignment, generate pressure by clamping with the handles. The handles are then secured using a rack and spring at the tail end to ensure sufficient and stable pressure on the object being clamped. However, due to limitations in the structure at the connection between the left and right handles, the clamping range of these forceps is somewhat limited.
[0006] A Chinese utility patent (application number: 201420787998.X) discloses a pressure-increasing medical forceps. The left and right handles of this pressure-increasing forceps are connected by a component 5. The clamping range is affected by the length of the front end of the handle and the length of the spring in component 6, thus the clamping range is somewhat limited.
[0007] A medical femoral head fitting compression clamp is disclosed in Chinese utility patent (application number: 202122784139.8). The compression clamp has a structural design with an adjustable compression range, which can be adjusted to a total of 6 different widths. However, it relies on spring force for clamping and holding, and the fixation is not locked. At the same time, the distance between each width adjustment level cannot be reached. Summary of the Invention
[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pressure clamp with infinitely adjustable width, which has the characteristics of novel structure and flexible and convenient use.
[0009] To solve the above-mentioned technical problems, the present invention achieves its objective as follows: The present invention relates to a stepless adjustable clamp, comprising a first clamp handle and a second clamp handle arranged in a cross configuration, with a stepless adjuster provided between the first clamp handle and the second clamp handle. The stepless adjuster includes an adjuster body, a shaft rotatably connected to the adjuster body, a threaded rod connected in series on the shaft, and a slider that moves axially connected to the threaded rod. A knob for driving rotation is provided on the shaft. The first clamp handle is hinged to the adjuster body, the second clamp handle is hinged to the slider, and a connecting rod is provided between the first clamp handle and the stepless adjuster, with one end hinged to the first clamp handle and the other end hinged to the slider.
[0010] The present invention is further configured such that: the hinge point between the first clamp handle and the adjuster body is located near the head of the first clamp handle, and the hinge point between the first clamp handle and the connecting rod is located near the tail of the first clamp handle.
[0011] The invention is further configured such that: a limiting hole extending along the length direction is provided on the regulator body, the length extension direction of the limiting hole is consistent with the axial direction of the shaft, the shaft passes through the limiting hole, the threaded rod is disposed in the limiting hole and rotates, and the slider slides in the limiting hole.
[0012] The invention is further configured such that the knob is located within the limiting hole and rotates.
[0013] The invention is further configured such that: the tail of the second pliers handle is rotatably connected to a rack extending radially, and the tail of the first pliers handle is provided with teeth that engage with the rack's tooth grooves.
[0014] The present invention is further configured such that: a spring is provided on the second clamp handle, one end of the spring is connected to the second clamp handle, and the other end abuts against the end of the rack.
[0015] The present invention is further configured such that the end of the rack has a circular arc surface structure.
[0016] The invention is further configured such that: the spring provides a spring-like movement that causes the rack to spring toward the tail of the pliers; the end of the first rack has a curved structure.
[0017] The present invention relates to a stepless width adjustable clamp, comprising a first clamp handle and a second clamp handle arranged in a cross pattern. The stepless width adjustable clamp further comprises a stepless adjuster and a connecting rod. The stepless adjuster comprises an adjuster body, a threaded rod rotatably disposed in the adjuster body, and a slider connected to the threaded adjuster.
[0018] The two ends of the connecting rod are respectively hinged to the first clamp and the slider. The first clamp is hinged to the adjuster body, and the second clamp is hinged to the slider. The slider is used to move along the axial direction of the threaded rod to adjust the distance between the head of the first clamp and the head of the second clamp when the threaded rod is rotated.
[0019] The invention is further configured such that: a limiting hole is formed on the regulator body; the threaded rod is disposed in the limiting hole, and the threaded rod extends in the same direction as the limiting hole; the slider is slidably embedded in the limiting hole, and the slider is operable to slide along the extending direction of the limiting hole.
[0020] The present invention is further configured such that: the stepless adjuster includes a shaft, the shaft rotatably passing through the adjuster body and being fixed in series with the threaded rod.
[0021] The present invention is further configured such that the hinge point between the regulator body and the first clamp handle is closer to the head of the first clamp handle than the hinge point between the connecting rod and the first clamp handle.
[0022] In summary, the present invention has the following beneficial effects: The stepless adjustable clamping pliers involved in the present invention can infinitely adjust the clamping range through the thread, so that the pliers can be applied to a variety of clamping scenarios and are suitable for clamping of a variety of widths. At the same time, the clamping width can be finely adjusted by adjusting the thread during the clamping process. The structure is novel, flexible and convenient to use, with complete overall functions and strong practicality. Attached Figure Description
[0023] Figure 1 is a schematic diagram of the overall structure in one embodiment of the present invention;
[0024] Figure 2 is a structural schematic diagram from another perspective in one embodiment of the present invention;
[0025] Figure 3 is a schematic diagram of the stepless regulator and the first clamp, the second clamp, and the connecting rod in one embodiment of the present invention.
[0026] Figure 4 is a schematic diagram of a partial structure of the tail of the pressure clamp in one embodiment of the present invention. Detailed Implementation
[0027] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that these descriptions are merely for further illustrating the features and advantages of the present invention, and not for limiting the scope of the patent claims of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0028] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.
[0029] Example 1
[0030] Referring to Figures 1 to 3, the stepless width adjustable clamps involved in this embodiment include a first clamp handle 1 and a second clamp handle 2 arranged in a cross configuration. A stepless adjuster is provided between the first clamp handle 1 and the second clamp handle 2. The stepless adjuster includes an adjuster body 3, a shaft 4 rotatably connected to the adjuster body 3, a threaded rod 5 connected in series on the shaft 4, and a slider 6 that moves axially connected to the threaded rod 5. A knob 7 for driving rotation is provided on the shaft 4. The first clamp handle 1 is hinged to the adjuster body 3, and the second clamp handle 2 is hinged to the slider 6. A connecting rod 8 is provided between the first clamp handle 1 and the stepless adjuster, with one end hinged to the first clamp handle 1 and the other end hinged to the slider 6. Specifically, a jaw is formed between the head of the first clamp handle 1 and the head of the second clamp handle 2, and the intersection of the first clamp handle 1 and the second clamp handle 2 and the jaw are located on both sides of the adjuster body 3, respectively. The second clamp handle 2 is hinged to the slider 6 via a hinge joint. The connecting rod 8 is hinged to the slider 6 via another hinge joint. Rotating the knob 7 drives the shaft 4, causing the threaded rod 5 to rotate accordingly. The slider 6 is driven by the threaded rod 5 to move linearly between the first clamp handle 1 and the second clamp handle 2, thereby adjusting the distance between the heads of the first clamp handle 1 and the second clamp handle 2, which is to adjust the jaw diameter. Understandably, in order to achieve the rotation of the shaft 4, in addition to using the knob, the shaft 4 can also be rotated directly or the threaded rod 5 can be rotated, or other driving structures can be used to replace the knob 5.
[0031] Furthermore, the hinge point between the first clamp handle 1 and the regulator body is located near the head of the first clamp handle 1, and the hinge point between the first clamp handle 1 and the connecting rod 8 is located near the tail of the first clamp handle 1.
[0032] Furthermore, the regulator body 3 has a limiting hole 9 extending along its length. The length extension direction of the limiting hole 9 is consistent with the axial direction of the shaft 4. The shaft 4 passes through the limiting hole 9, the threaded rod 5 is disposed within the limiting hole 9 and rotates, and the slider 6 slides within the limiting hole 9. In this embodiment, the slider 6 is limited by the limiting hole 9. In other embodiments, other limiting bars can be provided outside the regulator body 3, located above and below the slider, so that the slider can only move in a straight line.
[0033] Furthermore, the knob 7 is located within the limiting hole 9 and rotates.
[0034] In this embodiment, rotating the knob 7 clockwise causes the shaft 4 and its threaded rod 5 to rotate relative to the adjuster body 3, which in turn causes the slider 6 to adjust the connected first clamp 1 and connecting rod 8, thereby reducing the distance between the hinge of the second clamp 2 and slider 6 and the hinge of the adjuster body 3 and the first clamp 1, thus reducing the clamping width. Rotating the knob 7 counterclockwise causes the shaft 4 and its threaded rod 5 to rotate relative to the adjuster body 3, which in turn causes the slider 6 to adjust the connected first clamp 1 and connecting rod 8, thereby increasing the distance between the hinge of the second clamp 2 and slider 6 and the hinge of the adjuster body 3 and the first clamp 1, thus increasing the clamping width.
[0035] The limiting hole 9 serves two purposes: firstly, it accommodates the threaded rod 5 and the slider 6; secondly, it guides and limits the movement of the slider 6. The slider 6 is threadedly connected to the threaded rod 5 and is embedded in the limiting hole 9. The upper and lower walls of the limiting hole 9 limit the slider 6, so that when the threaded rod rotates, the slider 6 will not rotate with it, but will move along the extension direction of the limiting hole 9, which is the axial direction of the threaded rod, and this direction is the direction between the first clamp 1 and the second clamp 2.
[0036] Example 2
[0037] Referring to Figures 1 to 4, the stepless adjustable width pressure clamp involved in this embodiment is further configured based on embodiment 1, wherein the tail of the second clamp handle 2 is rotatably connected to a rack 10 extending radially, and the tail of the first clamp handle 1 is provided with teeth 11 that engage with the rack's tooth groove.
[0038] Furthermore, the second clamp handle 2 is provided with a spring piece 12, one end of which is connected to the second clamp handle and the other end abuts against the end of the rack.
[0039] Furthermore, the end of the rack 10 has a rounded surface structure, that is, the end of the rack 10 away from the second clamp handle 2 has a curved surface structure. The structure of the end of the rack 10 can facilitate the assembly of the first clamp handle 1 and the second clamp handle 2, and provide guidance for the first clamp handle 1, so that the tail of the first clamp handle 1 can slide into the rack 10.
[0040] In this embodiment, by abutting against the end of the rack 10, the spring 12 provides elastic force to pull the rack 10 toward the tail of the first pliers 1, so that the rack 10 in its natural state can face the tail of the first pliers 1, causing the teeth 11 to be engaged in a tooth groove of the rack 10 for limiting.
[0041] The present invention relates to a stepless adjustable clamping pliers. The clamping pliers can infinitely adjust the clamping range through the thread, so that the pliers can be applied to a variety of clamping scenarios and are suitable for clamping of a variety of widths. At the same time, the clamping width can be finely adjusted by adjusting the thread during the clamping process. The structure is novel, flexible and convenient to use, with complete functions and strong practicality.
[0042] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.
[0043] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0044] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A variable width, force pincer comprising a first pincer handle and a second pincer handle arranged in a cross, characterized in that: A stepless adjuster is provided between the first clamp handle and the second clamp handle. The stepless adjuster includes an adjuster body, a shaft is rotatably connected to the adjuster body, a threaded rod is connected in series on the shaft, a slider that moves axially is threadedly connected to the threaded rod, and a knob for driving rotation is provided on the shaft. The first clamp handle is hinged to the adjuster body, the second clamp handle is hinged to the slider, and a connecting rod is provided between the first clamp handle and the stepless adjuster, with one end hinged to the first clamp handle and the other end hinged to the slider.
2. The stepless width-adjustable clamp according to claim 1, characterized in that: The hinge point between the first clamp handle and the regulator body is located near the head of the first clamp handle, and the hinge point between the first clamp handle and the connecting rod is located near the tail of the first clamp handle.
3. The stepless width-adjustable clamp according to claim 1 or 2, characterized in that: The regulator body has a limiting hole extending along its length. The length extension direction of the limiting hole is consistent with the axial direction of the shaft. The shaft passes through the limiting hole. The threaded rod is disposed in the limiting hole and rotates. The slider is disposed in the limiting hole and slides.
4. The stepless width-adjustable clamp according to claim 3, characterized in that: The knob is located inside the limiting hole and rotates.
5. The stepless width-adjustable clamp according to claim 1, characterized in that: The tail of the second clamp handle is rotatably connected to a rack that extends radially, and the tail of the first clamp handle is provided with teeth that engage with the grooves of the rack.
6. The stepless width-adjustable clamp according to claim 5, characterized in that: The second clamp handle is provided with a spring clip, one end of which is connected to the second clamp handle and the other end abuts against the end of the rack.
7. The stepless width-adjustable clamp according to claim 6, characterized in that: The end of the rack has a rounded surface structure.
8. The stepless width-adjustable clamp according to claim 6, characterized in that: The spring provides a spring-like motion that causes the rack to spring toward the tail of the pliers; the end of the first rack has a curved structure.
9. A pressure clamp with infinitely adjustable width, comprising a first clamp handle and a second clamp handle arranged in a cross configuration, characterized in that: The stepless width-adjustable clamp further includes: a stepless adjuster and a connecting rod; the stepless adjuster includes an adjuster body, a threaded rod rotatably disposed in the adjuster body, and a slider connected to the threaded adjuster. The two ends of the connecting rod are respectively hinged to the first clamp and the slider. The first clamp is hinged to the adjuster body, and the second clamp is hinged to the slider. The slider is used to move along the axial direction of the threaded rod to adjust the distance between the head of the first clamp and the head of the second clamp when the threaded rod is rotated.
10. The stepless width-adjustable clamp according to claim 9, characterized in that: The regulator body has a limiting hole; the threaded rod is disposed in the limiting hole, and the threaded rod extends in the same direction as the limiting hole; the slider is slidably embedded in the limiting hole, and the slider is operable to slide along the extending direction of the limiting hole.
11. The stepless width-adjustable clamp according to claim 9, characterized in that: The stepless regulator also includes a shaft that rotatably passes through the regulator body and is fixed in series with the threaded rod.
12. The stepless width-adjustable clamp according to claim 9, characterized in that: The hinge point between the regulator body and the first clamp handle is closer to the head of the first clamp handle than the hinge point between the connecting rod and the first clamp handle.