Magnetic suction pressure maintaining jig

Abstract

This utility model relates to a magnetic pressure-holding fixture for holding watch cases under pressure. It includes at least two pressure-holding plates. Each pressure-holding plate includes a bearing surface for supporting and positioning the watch case, and a pressure-holding surface facing away from the bearing surface. The bearing surface has a positioning structure for positioning the watch case and a first magnetic member surrounding the positioning structure. The pressure-holding surface has a pressure-holding member and a second magnetic member corresponding to the first magnetic member. Two adjacent pressure-holding plates are magnetically connected by the first and second magnetic members, so that the pressure-holding member of one pressure-holding plate abuts against the watch case on the positioning structure of the other pressure-holding plate. The magnetic pressure-holding fixture designed in this utility model not only reduces waste in the production process but also improves the versatility of the pressure-holding plates.

Description

Technical Field

[0001] This utility model relates to the field of watch case processing and assembly technology, and in particular to a magnetic pressure holding fixture. Background Technology

[0002] In the watchmaking industry, the assembly and processing of the watch case is crucial to the overall quality and performance of the watch. The watch case usually needs to be precisely assembled with internal components such as the movement and dial. During the assembly process, it is necessary to ensure that the connections between the various parts of the watch case are tight and fit together to ensure the watch's sealing, stability, and appearance quality.

[0003] Currently, some watch cases are made by bonding a metal frame and internal injection-molded parts. After adhesive application and pressing, a pressure-holding fixture is required to maintain continuous pressure and ensure a firm bond between the two components. In existing technology, the pressure-holding fixture typically consists of two mating pressure-holding plates. During production, the two plates clamp the watch case together to form an independent unit. The two pressure-holding plates are connected by snap-fit ​​fasteners. Multiple independent units are then neatly stacked for temporary storage. This stacking process is time-consuming, labor-intensive, and generates no value. Furthermore, the snap-fit ​​connection method makes disassembly of the pressure-holding fixture inconvenient. All of these factors contribute to production waste and hinder cost reduction and efficiency improvement. Additionally, if one pressure-holding plate of the fixture is damaged, the entire fixture becomes unusable, resulting in wasted fixture usage. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to design a magnetic pressure-holding fixture, which can not only reduce waste in the production process but also improve the versatility of the pressure-holding plate of the fixture.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A magnetic pressure-holding fixture is designed for holding a watch case under pressure. It includes at least two pressure-holding plates. Each pressure-holding plate includes a bearing surface for supporting and positioning the watch case, and a pressure-holding surface opposite to the bearing surface. The bearing surface is provided with a positioning structure for positioning the watch case, and a first magnetic member surrounding the positioning structure. The pressure-holding surface is provided with a pressure-holding member, and a second magnetic member corresponding to the first magnetic member. Two adjacent pressure-holding plates are magnetically connected by the first and second magnetic members, so that the pressure-holding member of one pressure-holding plate abuts against the watch case on the positioning structure of the other pressure-holding plate.

[0007] In this solution, the pressure-holding plates in the magnetic pressure-holding fixture have identical structures. Pressure holding of the watch case is achieved by stacking two adjacent pressure-holding plates. The bearing surface of the pressure-holding plate is equipped with a positioning structure, enabling precise positioning of the watch case. During the pressure-holding process, the watch case can be stably placed in the predetermined position, preventing displacement or shaking, thus ensuring the accuracy and consistency of the pressure holding. Adjacent pressure-holding plates are magnetically connected by a first and a second magnetic attraction component. This connection method provides stable and uniform pressure. The magnetic attraction force ensures that the pressure-holding components are tightly pressed against the watch case, ensuring that all parts of the watch case receive uniform pressure and avoiding excessive or insufficient local pressure, thereby guaranteeing the quality of the pressure holding. Furthermore, the magnetic connection method makes the assembly and disassembly of the pressure-holding plates very convenient and quick. During the pressure-holding operation, the pressure-holding plates can be quickly assembled together, and after pressure holding is completed, they can be easily disassembled, improving production efficiency and reducing operation time and labor intensity. The pressure holding trays are stacked and magnetically connected, allowing multiple trays to be stacked together to form a neat, independent unit, reducing the time spent on the stacking process. Furthermore, the pressure holding trays are structurally identical and not designed as a set; if one tray is damaged, it does not affect the use of the pressure holding fixture, and only the damaged tray needs to be discarded or replaced.

[0008] Furthermore, the positioning structure includes a positioning boss, the watch case can be placed on the positioning boss, and the positioning boss is provided with an embedding protrusion that can be embedded in the hollow position inside the watch case.

[0009] The shape of the positioning boss matches the shape of the watch case. For example, if the watch case is oval, the positioning boss is roughly oval in shape. The interior of the watch case is a hollow, through-type structure, which is fitted onto the embedded protrusion. The embedded protrusion contacts the side wall inside the watch case. Multiple embedded protrusions are arranged in a ring to achieve the positioning of the watch case. The edges of the embedded protrusions are rounded to disperse local stress and prevent scratches on the watch case.

[0010] Furthermore, the positioning boss includes an abutment surface that contacts the bottom of the watch case, and the abutment surface is provided with an abutment protrusion.

[0011] The abutment surface is used to support the watch case. The watch case has a groove inside. After the watch case is placed on the abutment surface, the abutment protrusion corresponds one-to-one with the groove inside the watch case and is embedded in the groove, further improving the positioning accuracy of the watch case.

[0012] Furthermore, the positioning structure also includes a limiting boss disposed on the periphery of the positioning boss, the limiting boss being higher than the positioning boss, the side of the limiting boss facing the watch case being a limiting surface, and the limiting surface contacting the outer wall of the watch case.

[0013] The limiting boss is set on the periphery of the positioning boss, at least two of them are set, and they are located on opposite sides of the positioning boss. The limiting surface is in direct contact with the outer wall of the watch case to form a hard stop, eliminating the risk of radial micro-movement of the watch case during the pressure holding process. Combined with the embedded protrusion, it realizes three-dimensional space full degree of freedom locking.

[0014] Furthermore, the limiting surface is at least partially in contact with the outer wall of the watch case.

[0015] The structure of the limiting surface is adapted to different types of watch case outer walls to ensure that the limiting surface and the watch case outer wall are in surface contact, thereby ensuring the accuracy of the limiting. For example, if the watch case outer wall is flat, then the limiting surface is flat; if the watch case outer wall is curved, then the limiting surface is at least partially curved and fits against the curved surface of the watch case outer wall.

[0016] Furthermore, one of the limiting bosses is provided with a first clearance to avoid protrusions on the outer wall of the watch case.

[0017] The first clearance position, through a partially openwork design, provides physical clearance space for protrusions on the outer wall of the watch case, such as knobs and decorative parts, ensuring that the limiting surface only contacts the flat area of ​​the watch case without protrusions, maintaining the consistency of the positioning reference surface.

[0018] Furthermore, the bearing surface is provided with a bearing groove, and the positioning structure is located at the bottom of the bearing groove.

[0019] By setting a support groove, the watch case can be embedded in the support groove after being placed on the positioning structure. The top of the watch case is lower than the support groove so that the watch case is fully covered. During the production transfer process, this helps to protect the watch case from being scratched by foreign objects.

[0020] Furthermore, the sidewalls of the bearing groove are provided with two second clearance positions.

[0021] The second clearance area, through a partially hollowed-out design, provides space for fingers or tools to avoid being placed or removed from the watch case, making it easy to clamp the watch case from both sides.

[0022] Furthermore, the bearing surface is provided with a first groove for mounting the first magnetic component, and the pressure-holding surface is provided with a second groove for mounting the second magnetic component.

[0023] The first and second grooves provide physical limits for the first and second magnetic components, ensuring precise installation and preventing uneven adsorption force caused by component misalignment. The groove structure restricts the magnetic components' degrees of freedom, preventing displacement or detachment under vibration or external impact, while also avoiding collisions and friction with other components. The first and second grooves secure the first and second magnetic components, achieving a long-term stable connection.

[0024] Furthermore, the bearing surface is provided with positioning posts, and the pressure-holding surface is provided with positioning holes that correspond one-to-one with the positioning posts.

[0025] The positioning posts and positioning holes correspond one-to-one, forming a physical plug-in fit. This ensures that the pressure-holding plate is perfectly aligned during magnetic connection, eliminating the risk of horizontal misalignment. The post-hole fit provides self-guiding, eliminating the need for precise calibration by operators, achieving instant locking upon insertion.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] In this solution, the pressure-holding plates in the magnetic pressure-holding fixture have identical structures. Pressure holding of the watch case is achieved by stacking two adjacent pressure-holding plates. The bearing surface of the pressure-holding plate is equipped with a positioning structure, enabling precise positioning of the watch case. During the pressure-holding process, the watch case can be stably placed in the predetermined position, preventing displacement or shaking, thus ensuring the accuracy and consistency of the pressure holding. Adjacent pressure-holding plates are magnetically connected by a first and a second magnetic attraction component. This connection method provides stable and uniform pressure. The magnetic attraction force ensures that the pressure-holding components are tightly pressed against the watch case, ensuring that all parts of the watch case receive uniform pressure and avoiding excessive or insufficient local pressure, thereby guaranteeing the quality of the pressure holding. Furthermore, the magnetic connection method makes the assembly and disassembly of the pressure-holding plates very convenient and quick. During the pressure-holding operation, the pressure-holding plates can be quickly assembled together, and after pressure holding is completed, they can be easily disassembled, improving production efficiency and reducing operation time and labor intensity. The pressure holding trays are stacked and magnetically connected, allowing multiple trays to be stacked together to form a neat, independent unit, reducing the time spent on the stacking process. Furthermore, the pressure holding trays are structurally identical and not designed as a set; if one tray is damaged, it does not affect the use of the pressure holding fixture, and only the damaged tray needs to be discarded or replaced. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a pressure-holding fixture (with a housing installed) according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the pressure plate bearing surface (without a casing) in one embodiment of the present invention.

[0030] Figure 3 for Figure 2 A magnified view of part A in the image.

[0031] Figure 4 This is a schematic diagram of the pressure-holding surface of the pressure-holding plate according to an embodiment of the present invention.

[0032] Illustration: 1. Pressure holding plate; 2. Bearing surface; 21. Positioning structure; 211. Positioning boss; 2111. Embedded protrusion; 2112. Abutting surface; 2113. Abutting protrusion; 212. Limiting boss; 2121. Limiting surface; 2122. First clearance position; 22. First magnetic suction element; 23. Bearing groove; 231. Second clearance position; 24. First groove; 25. Positioning post; 3. Pressure holding surface; 31. Pressure holding element; 32. Second magnetic suction element; 33. Second groove; 34. Positioning hole; 4. Case. Detailed Implementation

[0033] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0034] like Figures 1 to 4 As shown, this embodiment provides a magnetic pressure-holding fixture for holding a watch case 4 under pressure. It includes at least two pressure-holding plates 1. The shape of the pressure-holding plates 1 is not limited; they can be oblong, elliptical, or polygonal, etc. In this embodiment, the pressure-holding plates 1 are designed as rounded rectangles. Each pressure-holding plate 1 includes a bearing surface 2 for supporting and positioning the watch case 4, and a pressure-holding surface 3 facing away from the bearing surface 2. The bearing surface 2 has a positioning structure 21 for positioning the watch case, and a first magnetic suction member 22 surrounding the positioning structure 21. The pressure-holding surface 3 has a pressure-holding member 31, and a second magnetic suction member 32 corresponding to the first magnetic suction member 22. Two adjacent pressure-holding plates 1 are magnetically connected by the first magnetic suction member 22 and the second magnetic suction member 32, so that the pressure-holding member 31 of one pressure-holding plate 1 abuts against the watch case 4 on the positioning structure 21 of the other pressure-holding plate 1. The number of pressure-holding plates 1 in the magnetic pressure-holding fixture is not fixed; the number of pressure-holding plates 1 can be reasonably configured according to actual usage requirements. The pressure-holding plates 1 are stacked together to form a whole by magnetic connection. Two adjacent pressure-holding plates 1 are magnetically connected to press and fix the watch case 4 located between them, so as to achieve pressure holding of the watch case 4.

[0035] It should be noted that the pressure-holding component 31 is a flat sheet with a coverage area larger than the surface of the watch case 4, so that the pressure-holding component 31 can completely cover the top of the watch case 4. The pressure-holding component 31 is not integrally molded with the pressure-holding surface 3. The pressure-holding component 31 is a sheet made of silicone, rubber or other flexible materials, which is bonded to the pressure-holding surface 3 by adhesive. The flexible material can play a buffering role at the moment of magnetic pressing to avoid scratching the surface of the watch case 4.

[0036] like Figure 3As shown, the positioning structure 21 includes a positioning boss 211, on which the watch case 4 can be placed. The positioning boss 211 has an embedding protrusion 2111 that can be embedded in the hollow position inside the watch case 4. The shape of the positioning boss 211 matches the shape of the watch case 4. For example, if the watch case 4 is oblong, the positioning boss 211 is approximately oblong. In this embodiment, the positioning boss 211 is a ring-shaped boss structure, and the embedding protrusion 2111 is located inside the ring-shaped boss. The surface of the positioning boss 211 that contacts the bottom of the watch case 4 is the abutment surface 2112, which is used to support the watch case 4. The abutment surface 2112 has an abutment protrusion 2113. The watch case 4 has a hollow, through-structure interior, fitted onto the embedded protrusions 2111. These protrusions 2111 contact the inner sidewalls of the watch case 4. Multiple protrusions 2111 are arranged in a ring, matching the contour of the hollow internal structure of the watch case 4, thus achieving the positioning of the watch case 4 and restricting its movement. The edges of the embedded protrusions 2111 are rounded to distribute localized stress and prevent scratches on the watch case 4. The watch case 4 has internal grooves. After the watch case 4 is placed on the abutment surface 2112, the abutment protrusions 2113 correspond one-to-one with the grooves inside the watch case 4 and are embedded within them, further improving the positioning accuracy of the watch case 4.

[0037] like Figure 3 As shown, the positioning structure 21 also includes limiting bosses 212 disposed around the positioning bosses 211. At least two limiting bosses 212 are provided, located on opposite sides of the positioning bosses 211. The limiting bosses 212 are higher than the positioning bosses 211. The side of the limiting bosses 212 facing the watch case 4 is a limiting surface 2121, which contacts the outer wall of the watch case 4. The limiting surface 2121 directly contacts the outer wall of the watch case 4, forming a hard stop, eliminating the risk of radial micro-movement of the watch case 4 during the pressure holding process. Combined with the embedded protrusions 2111, three-dimensional full-degree-of-freedom locking is achieved. In addition, the structure of the limiting surface 2121 is adapted to different types of watch case 4 outer side walls to ensure that the limiting surface 2121 and the watch case 4 outer side wall are in surface contact, thereby ensuring the accuracy of the limiting. For example, if the watch case 4 outer side wall is flat, then the limiting surface 2121 is flat; if the watch case 4 outer side wall is curved, then the limiting surface 2121 is at least partially curved and fits the curved surface of the watch case 4 outer side wall.

[0038] It should be noted that one of the limiting bosses 212 is provided with a first clearance 2122 to avoid protrusions on the outer wall of the watch case 4. The first clearance 2122 provides physical clearance space for protrusions on the outer wall of the watch case 4, such as knobs and decorative parts, through a partial hollow design, ensuring that the limiting surface 2121 only contacts the flat area of ​​the watch case 4 without protrusions, and maintaining the consistency of the positioning reference surface.

[0039] like Figure 2As shown, in this embodiment, the positioning structure 21 adopts a recessed design, and the bearing surface 2 is provided with a bearing groove 23. The positioning structure 21 is located at the bottom of the bearing groove 23. By setting the bearing groove 23, the watch case 4 can be embedded in the bearing groove 23 after being placed on the positioning structure 21. The top of the watch case 4 is lower than the bearing groove 23, so that the watch case 4 is fully covered. During the production transfer process, this helps to protect the watch case from being scratched by foreign objects. The sidewalls of the bearing groove 23 are provided with two second clearance positions 231. The second clearance positions 231 are partially hollowed out to provide space for fingers or tools to avoid picking up or putting down the watch case, making it easy to pick up the watch case 4 from both sides.

[0040] like Figure 2 and Figure 4 As shown, the bearing surface 2 has a first groove 24 for mounting the first magnetic attractor 22, and the pressure holding surface 3 has a second groove 33 for mounting the second magnetic attractor 32. In this embodiment, four first grooves 24 and four second grooves 33 are designed, located at the four corners of the pressure holding plate 1, to provide physical limits for the first magnetic attractor 22 and the second magnetic attractor 32, ensuring accurate installation of the magnetic attractors and avoiding uneven adsorption force caused by magnetic attractor offset. The first magnetic attractor 22 and the second magnetic attractor 32 can be installed and fixed in the first groove 24 and the second groove 33 by adhesive. The groove structure can restrict the degree of freedom of the magnetic attractor, preventing it from shifting or falling off under vibration or external impact, while avoiding collision and friction with other components. The first magnetic attractor 22 and the second magnetic attractor 32 are fixed by the first groove 24 and the second groove 33 to achieve a long-term stable connection. In this embodiment, the first magnetic attractor 22 and the second magnetic attractor 32 are both cylindrical magnets, so the first groove 24 and the second groove 33 are designed as circular grooves. In addition, in order to ensure the relative positional accuracy of the first magnetic absorbing member 22 and the second magnetic absorbing member 32, the first groove 24 and the second groove 33 can be designed as through holes, with the diameter of the middle part of the through hole being smaller than the diameter of the two ends, forming a stepped hole, thereby achieving the isolation of the first magnetic absorbing member 22 and the second magnetic absorbing member 32.

[0041] like Figure 2 and Figure 4 As shown, the bearing surface 2 is provided with positioning posts 25, and the pressure-holding surface 3 is provided with positioning holes 34 corresponding to the positioning posts 25. The positioning posts 25 and positioning holes 34 are all located at the edges of the four sides of the pressure-holding plate 1. In this embodiment, four sets of positioning posts 25 and positioning holes 34 are provided, distributed on opposite sides of the pressure-holding plate 1. The positioning posts 25 and positioning holes 34 correspond one-to-one, forming a physical plug-in fit, ensuring that the pressure-holding plate 1 is completely aligned during magnetic connection, eliminating the risk of horizontal offset. The post-hole fit provides a self-guiding function, eliminating the need for precise calibration by the operator, achieving immediate locking upon insertion.

[0042] In this embodiment, the pressure-holding plates 1 in the magnetic pressure-holding fixture have identical structures. Pressure holding of the watch case 4 is achieved by stacking two adjacent pressure-holding plates 1. The bearing surface 2 of the pressure-holding plate 1 is provided with a positioning structure 21, which can accurately position the watch case 4. During the pressure-holding process, the watch case 4 can be stably placed in a predetermined position, preventing displacement or shaking, thus ensuring the accuracy and consistency of the pressure holding. Two adjacent pressure-holding plates 1 are magnetically connected by a first magnetic element 22 and a second magnetic element 32. This connection method provides stable and uniform pressure. The magnetic attraction force allows the pressure-holding element 31 to tightly abut against the watch case 4, ensuring that all parts of the watch case 4 receive uniform pressure, avoiding excessive or insufficient local pressure, thereby ensuring the pressure-holding quality of the watch case 4. Furthermore, the magnetic connection method makes the assembly and disassembly of the pressure-holding plates 1 very convenient and quick. During the pressure holding operation, each pressure holding plate 1 can be quickly assembled together, and easily disassembled after pressure holding is completed, improving production efficiency and reducing operation time and labor intensity. Through the stacking and magnetic connection of the pressure holding plates 1, multiple pressure holding plates 1 can be stacked to form a neat, independent unit, reducing the time spent on the stacking process. Furthermore, the pressure holding plates 1 have identical structures and are not designed as a set; if one pressure holding plate 1 is damaged, it does not affect the use of the pressure holding fixture; simply discard or replace the damaged pressure holding plate 1.

[0043] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, the inclusion of "first," "second," etc., in a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic pressure-holding fixture for holding pressure on a gauge housing, characterized in that, The device includes at least two pressure-holding plates. Each pressure-holding plate includes a bearing surface for supporting and positioning the watch case, and a pressure-holding surface opposite to the bearing surface. The bearing surface is provided with a positioning structure for positioning the watch case and a first magnetic suction member surrounding the positioning structure. The pressure-holding surface is provided with a pressure-holding member and a second magnetic suction member corresponding to the first magnetic suction member. Two adjacent pressure-holding plates are magnetically connected by the first and second magnetic suction members, so that the pressure-holding member of one pressure-holding plate abuts against the watch case on the positioning structure of the other pressure-holding plate.

2. The magnetic pressure-holding fixture according to claim 1, characterized in that, The positioning structure includes a positioning boss, and the watch case can be placed on the positioning boss. The positioning boss is provided with an embedding protrusion that can be embedded in the hollow position inside the watch case.

3. The magnetic pressure-holding fixture according to claim 2, characterized in that, The positioning boss includes an abutment surface that contacts the bottom of the watch case, and the abutment surface is provided with an abutment protrusion.

4. The magnetic pressure-holding fixture according to claim 2, characterized in that, The positioning structure further includes a limiting boss disposed on the periphery of the positioning boss. The limiting boss is higher than the positioning boss, and the side of the limiting boss facing the watch case is a limiting surface, which is in contact with the outer wall of the watch case.

5. The magnetic pressure-holding fixture according to claim 4, characterized in that, The limiting surface is at least partially in contact with the outer wall of the watch case.

6. The magnetic pressure-holding fixture according to claim 4, characterized in that, One of the limiting bosses is provided with a first clearance to avoid the protrusion on the outer wall of the watch case.

7. The magnetic pressure-holding fixture according to claim 1, characterized in that, The bearing surface is provided with a bearing groove, and the positioning structure is located at the bottom of the bearing groove.

8. The magnetic pressure-holding fixture according to claim 7, characterized in that, The sidewalls of the bearing groove are provided with two second clearance positions.

9. The magnetic pressure-holding fixture according to claim 1, characterized in that, The bearing surface is provided with a first groove for mounting the first magnetic component, and the pressure-holding surface is provided with a second groove for mounting the second magnetic component.

10. The magnetic pressure-holding fixture according to claim 1, characterized in that, The bearing surface is provided with positioning posts, and the pressure-holding surface is provided with positioning holes that correspond one-to-one with the positioning posts.

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