Improved sleeve crown pliers

Abstract

This utility model discloses a structurally improved sleeve crown pliers, comprising two plier arms arranged side-by-side and hinged together. A sleeve crown plier head is fitted into a plier head mounting hole at the upper end of each plier arm. A transverse receiving groove extending circumferentially along the upper end of each plier arm and communicating with the plier head mounting hole is formed at the upper end of the plier arm. A movable pressing component is slidably installed within the transverse receiving groove. An arc-shaped groove aligned with the plier head mounting hole is formed on the inner wall of the movable pressing component, and a limiting flange is provided within the arc-shaped groove. A compression spring is installed between the movable pressing component and the upper end of the plier arm. The compression spring and the arc-shaped groove are located on opposite sides of the upper end of the plier arm. The inner end of the compression spring elastically abuts against the upper end of the plier arm, and the outer end of the compression spring elastically abuts against the movable pressing component. A positioning groove is formed at the lower end of the sleeve crown plier head, and the limiting flange is embedded in the positioning groove of the sleeve crown plier head. Through the above structural design, this utility model has the advantages of novel structural design, convenient and quick plier head assembly and disassembly, and good anti-loosening effect of the plier head.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a modified sleeve crown forceps. Background Technology

[0002] Telescopic crown dentures are removable prosthetic restorations composed of an inner crown and an outer crown. The inner crown, made of metal, fits snugly against the abutment tooth to form a retention base, while the outer crown fits snugly against the inner crown. Telescopic crown dentures are characterized by good retention stability, excellent force distribution, and a balance of aesthetics and function, making them suitable for patients with multiple missing teeth or poor abutment tooth retention. The separation and disassembly of the outer crown and inner crown is generally achieved using telescopic crown forceps.

[0003] Among them, the Chinese utility model patent with patent number ZL202021410468.5 and patent name: "A movable internal crown forceps", substantially discloses a sleeve crown forceps structure. Specifically, the movable internal crown forceps discloses the following technical solution: a movable internal crown forceps, including a first hand-held drive arm, a second hand-held drive arm, a first long bar, a second long bar, a first movable contact block, and a second movable contact block. The first long bar and the first movable contact block together form a first pliers head, and the second long bar and the second movable contact block together form a second pliers head. The first hinge part of the first hand-held drive arm is hinged to the second hinge part of the second hand-held drive arm. The first hand-held drive arm is provided with a first mounting through hole, and the first long bar can be installed in the first mounting through hole by means of threaded connection or screw clamping. The second hand-held drive arm is provided with a second mounting through hole, and the second long bar can be installed in the second mounting through hole by means of threaded connection or screw clamping.

[0004] When using the aforementioned movable internal crown forceps, the operator holds the first and second hand-operated drive arms with both hands and applies force to bring the rear ends of the first and second hand-operated drive arms closer together. During this process, the first and second long bars at the front end will drive the first and second movable contact blocks to move away from each other, causing each movable contact block to abut against the inner wall of the internal crown, thereby forming a stable force point on the internal crown.

[0005] It should be noted that the aforementioned removable internal crown forceps still has the following drawbacks, specifically: Defect 1: The long bar of each pliers head is installed on the hand-held drive arm by threaded connection or screw clamping. During the transfer or cleaning process, the long bar may come loose, which will cause the pliers head to be lost. Defect 2: Inconvenient pliers head disassembly and assembly; for long bars installed on the hand-held drive arm using threaded connections, it takes a long time to rotate the long bar during disassembly and assembly; for long bars installed on the hand-held drive arm using screw clamps, a large tightening force is required to ensure that the long bar is clamped and fixed. Utility Model Content

[0006] The purpose of this utility model is to provide a modified sleeve crown pliers to address the shortcomings of the existing technology. The modified sleeve crown pliers have a novel structural design, the pliers head is easy and quick to assemble and disassemble, and the pliers head has a good anti-loosening effect.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0008] An improved sleeve crown pliers includes two plier arms that are arranged facing each other and hinged to each other. The upper end of the pliers arm has an upward-opening pliers head mounting hole, in which a sleeve crown pliers head is embedded, and the upper end of the sleeve crown pliers head extends to the upper end of the pliers arm. The upper end of the clamp arm is provided with a transverse receiving groove that extends circumferentially along the upper end of the clamp arm and communicates with the clamp head mounting hole. A movable pressing component is slidably installed in the transverse receiving groove, and the movable pressing component surrounds the outer periphery of the upper end of the clamp arm. The inner wall of the movable pressing part is provided with an arc-shaped groove aligned with the mounting hole of the clamp head, and a limit flange is provided in the arc-shaped groove; a compression spring is installed between the movable pressing part and the upper end of the clamp arm, the compression spring and the arc-shaped groove are located on the two sides directly opposite the upper end of the clamp arm, the inner end of the compression spring elastically abuts against the upper end of the clamp arm, and the outer end of the compression spring elastically abuts against the movable pressing part. The lower end of the sleeve crown pliers head is provided with a positioning groove, and the limiting flange of the movable pressing part is embedded in the positioning groove of the sleeve crown pliers head.

[0009] The lower end of the sleeve crown pliers head is provided with several positioning grooves arranged at intervals from top to bottom.

[0010] The movable pressing component includes a C-shaped block, a limiting block screwed onto the C-shaped block, an arc-shaped groove formed in the C-shaped block, and the limiting flange and the C-shaped block are integrally formed. The compression spring is located between the limiting block and the upper end of the clamp arm, and the outer end of the compression spring elastically abuts against the limiting block.

[0011] The limiting block has an outer positioning hole corresponding to the compression spring, and the upper end of the clamp arm has an inner positioning hole corresponding to the compression spring. The outer end and inner end of the compression spring extend into the outer positioning hole and inner positioning hole of the spring on the corresponding side, respectively.

[0012] The C-shaped block, the limiting block, and the compression spring are all made of stainless steel.

[0013] The clamp arm includes a clamp head mounting part, a hinge part, and a gripping operation part connected sequentially from top to bottom. The clamp head mounting part, hinge part, and gripping operation part of the clamp arm are an integral structure. The hinge parts of the two clamp arms are hinged by a pivot. The clamp head mounting hole and the transverse receiving groove are respectively opened in the clamp head mounting part.

[0014] An elastic element is installed between the gripping operation parts of the two clamp arms, with the left and right ends of the elastic element elastically abutting against the gripping operation parts on the corresponding sides.

[0015] The elastic element is either a sheet-type elastic element or a spring-type elastic element.

[0016] One of the clamp arms has an internally threaded hole that extends completely through the left and right directions between the hinge and the elastic element, and an opening adjustment screw is threaded into the internally threaded hole. When the gripping parts of the two clamp arms are brought together, the clamp arm on the opposite side of the opening adjustment screw is positioned at the end of the opening adjustment screw.

[0017] The clamp arm is made of stainless steel.

[0018] Compared with the prior art, the present invention has the following beneficial effects, specifically: 1. This utility model achieves locking and limiting of the sleeve crown pliers head by cooperating with the limiting flange and the positioning groove. During the disassembly and assembly of the sleeve crown pliers head, the user only needs to press the movable pressing part and push and pull the sleeve crown pliers head vertically. Compared with the prior art, the disassembly and assembly of the pliers head of this utility model is more convenient and faster. 2. Due to the elastic force of the compression spring, the limiting flange is stably and reliably held in the positioning groove of the sleeve crown pliers head. Compared with the prior art, the locking and limiting method of the sleeve crown pliers head of this utility model is more stable and reliable, that is, the anti-loosening effect of the pliers head is better. 3. Therefore, the improved sleeve crown pliers of this utility model have the advantages of novel structural design, convenient and quick disassembly and assembly of the pliers head, and good anti-loosening effect of the pliers head. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partially exploded view of the present invention.

[0023] Figure 4 This is a partial cross-sectional schematic diagram of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the movable pressing component of this utility model.

[0025] exist Figures 1 to 5 This includes: 1-Pliers arm; 11-Pliers head mounting hole; 12-Transverse receiving groove; 13-Spring inner positioning hole; 14-Pliers head mounting part; 15-Hinge part; 16-Grip operating part; 2-Sleeve crown pliers head; 21-Positioning groove; 3-Modible pressing part; 31-Arc groove; 32-Limiting flange; 33-C-shaped block; 34-Limiting stop block; 341-Spring outer positioning hole; 4-Compression spring; 5-Elastic element; 6-Opening adjustment screw. Detailed Implementation

[0026] The present invention will now be described in conjunction with specific embodiments.

[0027] Example 1, as Figures 1 to 4 As shown, a modified sleeve crown pliers includes two clamp arms 1 arranged facing each other and hinged to each other; wherein each clamp arm 1 can be made of stainless steel.

[0028] Furthermore, such as Figures 1 to 4 As shown, the upper end of the clamp arm 1 has an upward-opening clamp head mounting hole 11. A sleeve crown clamp head 2 is embedded in the clamp head mounting hole 11, and the upper end of the sleeve crown clamp head 2 extends to the upper end of the clamp arm 1. It should be explained that the lower end of the sleeve crown clamp head 2 is a circular rod-shaped structure. Correspondingly, the clamp head mounting hole 11 is a circular hole structure, and the inner diameter of the clamp head mounting hole 11 is equal to the outer diameter of the lower end of the sleeve crown clamp head 2.

[0029] Furthermore, such as Figures 1 to 5 As shown, the upper end of the clamp arm 1 has a transverse receiving groove 12 that extends circumferentially along the upper end of the clamp arm 1 and communicates with the clamp head mounting hole 11. A movable pressing member 3 is slidably installed in the transverse receiving groove 12, and the movable pressing member 3 surrounds the outer periphery of the upper end of the clamp arm 1. The movable pressing member 3 is vertically limited between the upper wall and the lower wall of the transverse receiving groove 12.

[0030] It should be noted that, as Figures 1 to 4As shown, the clamp arm 1 includes a clamp head mounting part 14, a hinge part 15, and a gripping operation part 16 connected sequentially from top to bottom. The clamp head mounting part 14, the hinge part 15, and the gripping operation part 16 of the clamp arm 1 are an integral structure. The hinge parts 15 of the two clamp arms 1 are hinged by a pivot. The clamp head mounting hole 11 and the transverse receiving groove 12 are respectively opened in the clamp head mounting part 14.

[0031] In addition, such as Figures 3 to 5 As shown, the inner wall of the movable pressing member 3 is provided with an arc-shaped groove 31 aligned with the clamp head mounting hole 11, and a limiting flange 32 is provided in the arc-shaped groove 31; a compression spring 4 is installed between the movable pressing member 3 and the upper end of the clamp arm 1. The compression spring 4 and the arc-shaped groove 31 are located on opposite sides of the upper end of the clamp arm 1. The inner end of the compression spring 4 elastically abuts against the upper end of the clamp arm 1, and the outer end of the compression spring 4 elastically abuts against the movable pressing member 3.

[0032] And also, such as Figure 3 and Figure 4 As shown, a positioning groove 21 is provided at the lower end of the sleeve crown pliers head 2, and the limiting flange 32 of the movable pressing member 3 is embedded in the positioning groove 21 of the sleeve crown pliers head 2.

[0033] During the process of installing the sleeve crown pliers head 2 into the pliers head mounting hole 11, first press the movable pressing member 3 inward and cause the limiting flange 32 in the arc groove 31 to retract from the pliers head mounting hole 11. At this time, the compression spring 4 is compressed. Then, maintain the pressing operation of the movable pressing member 3 and align the lower end of the sleeve crown pliers head 2 into the pliers head mounting hole 11. Then release the movable pressing member 3. The return force of the compression spring 4 causes the limiting flange 32 to press against the outer circumferential surface of the lower end of the sleeve crown pliers head 2. Finally, push and pull the sleeve crown pliers head 2 vertically and cause the limiting flange 32 to embed into the positioning groove 21 of the sleeve crown pliers head 2. At this time, the inner wall of the pliers head mounting hole 11 circumferentially limits the sleeve crown pliers head 2. The limiting flange 32 cooperates with the positioning groove 21 to realize the vertical limitation of the sleeve crown pliers head 2, so as to ensure that the sleeve crown pliers head 2 is stably and reliably installed in the pliers head mounting hole 11.

[0034] During the disassembly of the sleeve crown pliers head 2, press the movable pressing part 3 and cause the limiting flange 32 in the arc groove 31 to retract from the pliers head mounting hole 11, thereby causing the limiting flange 32 to retract from the positioning groove 21 of the sleeve crown pliers head 2. Then, the sleeve crown pliers head 2 can be directly pulled out from the pliers head mounting hole 11.

[0035] It should be emphasized that the improved sleeve crown pliers of this embodiment achieve locking and limiting of the sleeve crown pliers head 2 by cooperating with the limiting flange 32 and the positioning groove 21. During the disassembly and assembly of the sleeve crown pliers head 2, the user only needs to press the movable pressing part 3 and push and pull the sleeve crown pliers head 2 vertically. Compared with the prior art, the disassembly and assembly of the pliers head in this embodiment is more convenient and faster.

[0036] It should be further emphasized that, due to the elastic force of the compression spring 4, the limiting flange 32 is stably and reliably kept in the positioning groove 21 of the sleeve crown pliers head 2. Compared with the prior art, the locking and limiting method of the sleeve crown pliers head 2 in this embodiment is more stable and reliable, that is, the pliers head anti-loosening effect is better.

[0037] In the process of removing the inner crown of the sleeve crown using the sleeve crown pliers with the improved structure of this embodiment, the user holds the lower ends of the two plier arms 1 and inserts the upper ends of the two sleeve crown plier heads 2 into the inner cavity of the inner crown. Then, the user grips the gripping parts 16 of the two plier arms 1 and brings the gripping parts 16 of the two plier arms 1 together, thereby causing the two sleeve crown plier heads 2 to open away and press against the inner wall of the inner cavity of the inner crown, thereby forming a stable point of force on the inner crown.

[0038] In summary, the improved sleeve crown pliers of this embodiment have the advantages of novel structural design, convenient and quick disassembly and assembly of the pliers head, and good anti-loosening effect of the pliers head, thanks to the above structural design.

[0039] Example 2, as Figure 3 and Figure 4 As shown, the difference between this embodiment 2 and embodiment 1 is that the lower end of the sleeve crown pliers head 2 is provided with a number of positioning grooves 21 arranged sequentially from top to bottom.

[0040] It should be noted that since the sleeve crown pliers head 2 has multiple positioning grooves 21, during the process of installing the sleeve crown pliers head 2 into the pliers head mounting hole 11, the user can selectively insert the limiting flange 32 into one of the positioning grooves 21, and then adaptably adjust the length of the sleeve crown pliers head 2 extending out of the pliers head mounting hole 11 according to the usage requirements.

[0041] Example 3, as Figures 2 to 5 As shown, the difference between this embodiment 3 and embodiment 1 is that the movable pressing component 3 includes a C-shaped block 33, a limiting block 34 screwed onto the C-shaped block 33, an arc groove 31 opened on the C-shaped block 33, and the limiting flange 32 and the C-shaped block 33 are an integral structure.

[0042] The compression spring 4 is located between the limiting block 34 and the upper end of the clamp arm 1, and the outer end of the compression spring 4 elastically abuts against the limiting block 34.

[0043] It should be explained that the C-shaped block 33, the limit stop block 34, and the compression spring 4 are all made of stainless steel.

[0044] Example 4, as Figure 3 and Figure 4As shown, the difference between this embodiment four and embodiment three is that: the limiting block 34 has an outer positioning hole 341 corresponding to the compression spring 4, and the upper end of the clamp arm 1 has an inner positioning hole 13 corresponding to the compression spring 4. The outer end and inner end of the compression spring 4 extend into the outer positioning hole 341 and the inner positioning hole 13 of the spring on the corresponding side, respectively.

[0045] By positioning the two ends of the compression spring 4 through the outer positioning hole 341 and the inner positioning hole 13, this embodiment can effectively improve the stability of the installation position of the compression spring 4, thereby avoiding the problem of displacement and slippage of the compression spring 4 during use, and improving the stability and reliability of use.

[0046] Example 5, as Figure 1 As shown, the difference between this fifth embodiment and the first embodiment is that an elastic element 5 is installed between the gripping operation parts 16 of the two clamp arms 1, and the left and right ends of the elastic element 5 elastically abut against the gripping operation parts 16 on the corresponding sides.

[0047] Among them, the elastic element 5 is either a sheet-type elastic element 5 or a spring-type elastic element 5.

[0048] Example 6, as Figure 1 As shown, the difference between this embodiment six and embodiment one is that: one of the clamp arms 1 has an internal threaded hole that runs completely through the left and right direction between the hinge part 15 and the elastic member 5, and the opening adjustment screw 6 is installed inside the internal threaded hole.

[0049] It should be noted that when the gripping operation parts 16 of the two clamp arms 1 are brought together, the clamp arm 1 on the opposite side of the opening adjustment screw 6 is positioned at the end of the opening adjustment screw 6.

[0050] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A modified sleeve crown pliers, comprising two plier arms (1) arranged facing each other and hinged to each other. The upper end of the pliers arm (1) is provided with an upward-opening pliers head mounting hole (11), and a sleeve crown pliers head (2) is embedded in the pliers head mounting hole (11), and the upper end of the sleeve crown pliers head (2) extends to the upper end side of the pliers arm (1). Its features are: The upper end of the clamp arm (1) is provided with a transverse receiving groove (12) that extends circumferentially along the upper end of the clamp arm (1) and communicates with the clamp head mounting hole (11). A movable pressing member (3) is slidably installed in the transverse receiving groove (12) and surrounds the outer periphery of the upper end of the clamp arm (1). The inner wall of the movable pressing part (3) is provided with an arc-shaped groove (31) aligned with the clamp head mounting hole (11), and a limiting flange (32) is provided in the arc-shaped groove (31); a compression spring (4) is installed between the movable pressing part (3) and the upper end of the clamp arm (1). The compression spring (4) and the arc-shaped groove (31) are located on the two sides directly opposite the upper end of the clamp arm (1). The inner end of the compression spring (4) is in elastic contact with the upper end of the clamp arm (1), and the outer end of the compression spring (4) is in elastic contact with the movable pressing part (3). The lower end of the sleeve crown pliers head (2) is provided with a positioning groove (21), and the limiting flange (32) of the movable pressing part (3) is embedded in the positioning groove (21) of the sleeve crown pliers head (2).

2. The improved sleeve crown pliers according to claim 1, characterized in that: The lower end of the sleeve crown pliers (2) is provided with several positioning grooves (21) arranged sequentially from top to bottom.

3. The improved sleeve crown pliers according to claim 1, characterized in that: The movable pressing component (3) includes a C-shaped block (33) in the shape of a "C", a limiting block (34) screwed onto the C-shaped block (33), an arc groove (31) is opened on the C-shaped block (33), and the limiting flange (32) and the C-shaped block (33) are an integral structure; The compression spring (4) is located between the limiting block (34) and the upper end of the clamp arm (1), and the outer end of the compression spring (4) elastically abuts against the limiting block (34).

4. The improved sleeve crown pliers according to claim 3, characterized in that: The limiting block (34) has an outer positioning hole (341) corresponding to the compression spring (4), and the upper end of the clamp arm (1) has an inner positioning hole (13) corresponding to the compression spring (4). The outer end and inner end of the compression spring (4) extend into the outer positioning hole (341) and inner positioning hole (13) of the corresponding side, respectively.

5. The improved sleeve crown pliers according to claim 3, characterized in that: The C-shaped block (33), the limiting block (34), and the compression spring (4) are all made of stainless steel.

6. The improved sleeve crown pliers according to claim 1, characterized in that: The clamp arm (1) includes a clamp head mounting part (14), a hinge part (15), and a gripping operation part (16) connected sequentially from top to bottom. The clamp head mounting part (14), the hinge part (15), and the gripping operation part (16) of the clamp arm (1) are an integral structure. The hinge parts (15) of the two clamp arms (1) are hinged by a pivot. The clamp head mounting hole (11) and the transverse receiving groove (12) are respectively opened in the clamp head mounting part (14).

7. The improved sleeve crown pliers according to claim 6, characterized in that: An elastic element (5) is installed between the gripping operation parts (16) of the two clamp arms (1). The left and right ends of the elastic element (5) elastically abut against the gripping operation parts (16) on the corresponding sides.

8. The improved sleeve crown pliers according to claim 7, characterized in that: The elastic element (5) is a sheet-type elastic element (5) or a spring-type elastic element (5).

9. A modified sleeve crown pliers according to claim 7, characterized in that: One of the clamp arms (1) has an internal threaded hole that runs through the entire length of the left and right directions between the hinge part (15) and the elastic member (5), and the opening adjustment screw (6) is installed inside the internal threaded hole. When the gripping operation parts (16) of the two clamp arms (1) come together in place, the clamp arm (1) on the opposite side of the opening adjustment screw (6) is abutted against the end of the opening adjustment screw (6).

10. A structurally improved sleeve crown pliers according to any one of claims 1-9, characterized in that: The clamp arm (1) is made of stainless steel.

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