Pressure relief protection structure convenient for pressure relief and corresponding multi-layer structure watch

Abstract

The application provides a pressure relief protection structure and a corresponding multi-layer structure watch. The pressure relief protection structure comprises a pressure relief channel, a pressure relief piece and a pressure relief elastic piece. The pressure relief piece comprises a pressure relief column and a pressure relief crown. The pressure relief column has opposite pressure relief inner and outer ends. The pressure relief crown is located at the pressure relief outer end and is threadedly connected at the opening of the pressure relief channel. When the pressure relief crown is loosened, the pressure relief crown is misaligned with the first sealing ring to allow clearance fit therebetween. If the pressure is too large, the pressure relief column moves outward to misalign the position of the second sealing ring, so that pressure relief can be performed. When the pressure is reduced to a certain extent, the pressure relief column is in contact with the second sealing ring under the action of the pressure relief elastic piece, and pressure relief is stopped. The pressure relief column and the pressure relief crown are two independent components that can be separated. When the pressure relief crown rotates, the pressure relief column will not move, so as to avoid affecting the elastic structure. When the pressure relief column moves along the pressure relief channel, the pressure relief column will not move the pressure relief crown, so as to ensure the flexibility of movement.

Description

[0001] This application is a divisional application. The original application has the application number "202210680460.8", the application date "June 15, 2022", and the invention title "Pressure relief protection structure and corresponding multi-layer structure watch". Technical Field

[0002] This invention relates to the field of watches, and in particular to a pressure relief protection structure for convenient pressure release and a corresponding multi-layered watch structure. Background Technology

[0003] Current watch designs typically feature waterproof seals to prevent liquids from entering the watch. However, when a user wears the watch in a humid environment, such as a sauna or while cooking, the high ambient temperature can cause the seals to fail. Furthermore, moisture can more easily penetrate the seals and enter the watch, damaging it and affecting its usability.

[0004] Pre-existing liquid inside the meter can prevent moisture from entering the core of the meter. When the meter with built-in liquid is in a high-temperature and humid environment, the internal pressure will increase, and the built-in liquid may seep into the core structure of the meter and cause damage. Therefore, it is necessary to design a structure that can easily release the internal pressure of the meter. Summary of the Invention

[0005] This invention provides a pressure relief protection structure for convenient pressure release and a corresponding multi-layered watch structure, which can easily release the internal pressure of the watch.

[0006] On one hand, the present invention provides a pressure relief protection structure for convenient pressure relief in multi-layered watches. The structure comprises a pressure relief channel, a pressure relief component, and a pressure relief elastic component. The pressure relief channel connects the inner and outer sides of the multi-layered watch. The pressure relief component includes a pressure relief post and a pressure relief crown. The pressure relief post is slidably disposed within the pressure relief channel along its axial direction. The post has opposing inner and outer pressure relief ends. The pressure relief elastic component connects the inner pressure relief end to the pressure relief channel. The post and crown are two separable independent components. The crown is located at the outer pressure relief end and is threadedly connected to the opening of the pressure relief channel to restrict the movement of the post.

[0007] A first sealing ring is provided between the pressure relief crown and the pressure relief channel, and a second sealing ring is provided between the pressure relief column and the pressure relief channel. Both the first sealing ring and the second sealing ring are positioned on the inner wall of the pressure relief channel.

[0008] When the pressure relief protection structure is in a sealed state, the pressure relief crown is screwed into the opening of the pressure relief channel, the pressure relief crown is in contact with the first sealing ring, and the pressure relief column is in contact with the second sealing ring;

[0009] When the pressure relief crown is loosened, it moves outwards towards the multi-layered watch structure, misaligning with the first sealing ring to create a gap fit. This releases the seal between the pressure relief crown and the pressure relief channel, and simultaneously creates a gap between the pressure relief crown and the pressure relief column. If the pressure inside the waterproof cavity is too high, it will push the pressure relief column outwards. After moving a certain distance, the pressure relief column will be misaligned from the second sealing ring, and the two will maintain a gap fit. This opens the seal between the pressure relief column and the pressure relief channel, allowing pressure relief to occur. When the pressure drops to a certain level, the pressure relief column, under the action of the pressure relief elastic element, moves towards the waterproof cavity, contacting the second sealing ring and sealing the pressure relief column and the pressure relief channel, thus stopping the pressure relief.

[0010] The inner edge of the pressure relief end is provided with a first limiting part, the inner wall of the pressure relief channel is provided with a second limiting part, the pressure relief elastic element is a compression spring, which is sleeved on the pressure relief column and located between the first limiting part and the second limiting part; the second sealing ring is provided between the first limiting part and the pressure relief channel.

[0011] The pressure relief crown includes a pressure relief plate, a pressure relief ring, and a central post. The pressure relief ring is fixedly arranged along the periphery of the pressure relief plate. The central post is coaxially arranged with the pressure relief ring and is located inside the pressure relief ring. One end of the central post is fixedly connected to the pressure relief plate. The other end of the central post is arranged opposite to the outer end of the pressure relief plate. The central post is in contact with or clearance-fitted with the first sealing ring. The pressure relief ring is threadedly connected to the inlet of the pressure relief channel.

[0012] The multi-layered watch is provided with a pressure relief hole, which connects the outer side of the multi-layered watch and the waterproof cavity.

[0013] The pressure relief protection structure also includes a pressure relief pipe, which is disposed in the pressure relief through hole. The outer wall of the pressure relief pipe is press-fitted with the pressure relief through hole and is provided with a sealing structure. The space inside the pressure relief pipe forms the pressure relief channel, and the pressure relief ring is threadedly connected to the pressure relief pipe.

[0014] The pressure relief pipe includes a first pressure relief pipe and a second pressure relief pipe arranged coaxially. The second pressure relief pipe is closer to the waterproof steam cavity than the first pressure relief pipe. The outer diameter of the first pressure relief pipe is larger than the outer diameter of the second pressure relief pipe, and the outer walls of the first pressure relief pipe and the second pressure relief pipe are transitioned by a bevel. The first pressure relief pipe is interference-fitted with the pressure relief through hole, and the second pressure relief pipe is clearance-fitted with the pressure relief through hole.

[0015] The pressure relief pipe further includes a pressure relief retaining ring, which is coaxially arranged with the first pressure relief pipe and the second pressure relief pipe. The first pressure relief pipe is connected between the pressure relief retaining ring and the second pressure relief pipe. The outer diameter of the pressure relief retaining ring is larger than the outer diameter of the first pressure relief pipe, and a pressure relief outer step is formed between the outer peripheral surfaces of the pressure relief retaining ring and the first pressure relief pipe. The pressure relief outer step is blocked at the outer edge of the pressure relief through hole to limit the insertion depth of the pressure relief pipe in the multi-layer structure watch. The inner surface of the pressure relief ring is threaded to the outer peripheral surface of the pressure relief retaining ring.

[0016] The inner wall of the pressure relief channel is provided with a second limiting part, and the first sealing ring is provided on the side of the second limiting part near the pressure relief crown. The inner diameter of the first sealing ring is larger than the outer diameter of the pressure relief outer end, so that the first sealing ring and the pressure relief outer end always maintain a clearance fit.

[0017] When the pressure relief protection structure is in a sealed state, the first sealing ring is pressed between the second limiting part and the central column, so that the pressure relief crown and the pressure relief channel are in a sealed state.

[0018] On the other hand, the present invention provides a multi-layer structure watch, wherein the multi-layer structure watch is provided with the aforementioned pressure relief protection structure, and a waterproof vapor chamber is provided inside the multi-layer structure watch, and the pressure relief channel of the pressure relief protection structure connects the outside of the multi-layer structure watch with the waterproof vapor chamber.

[0019] The multi-layered watch has, from the inside out, a sealed cavity, a first sealing structure, a waterproof vapor chamber, and a second sealing structure. The sealed cavity is used to accommodate the watch movement and is sealed within the first sealing structure. The waterproof vapor chamber is filled with liquid and is sealed between the first sealing structure and the second sealing structure.

[0020] Compared with the prior art, the advantages of this invention are as follows: When the pressure relief crown is loosened, the pressure relief crown and the first sealing ring are misaligned to achieve a clearance fit; if the pressure is too high, the pressure relief column moves outward to offset the position of the second sealing ring, thus relieving pressure; when the pressure drops to a certain level, the pressure relief column contacts the second sealing ring under the action of the pressure relief elastic element, stopping the pressure relief; the pressure relief column and the pressure relief crown are two separate components that can be separated. When the pressure relief crown rotates, it will not drive the pressure relief column to rotate or move, so as to avoid affecting the elastic structure; when the pressure relief column moves along the pressure relief channel, the pressure relief column will not drive the pressure relief crown to move, so as to ensure the flexibility of the pressure relief column's movement and enable it to relieve pressure in a timely manner. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0022] Figure 1 This is a three-dimensional structural diagram of a multi-layer watch provided in the first embodiment of the present invention.

[0023] Figure 2 for Figure 1 A schematic diagram of the front structure of a multi-layered watch.

[0024] Figure 3 for Figure 2 A cross-sectional view at the AOB of a multi-layered watch.

[0025] Figure 4 for Figure 4 A cross-sectional view of the AOC section of a multi-layered watch.

[0026] Figure 5 yes Figure 1 An exploded view of the pressure relief protection structure in a multi-layered watch.

[0027] Figure 6 yes Figure 5 A magnified view of point N in the middle.

[0028] Figure 7 yes Figure 4 Enlarged view of point F in the middle.

[0029] Figure 8 yes Figure 7 Cross-sectional view of the pressure relief protection structure in the pressure relief state.

[0030] Figure 9 for Figure 1 An exploded view of the back of a multi-layered watch.

[0031] Figure 10This is a cross-sectional view of the pressure relief protection structure of the multi-layered watch provided in the second embodiment of the present invention.

[0032] Figure 11 yes Figure 10 Cross-sectional view of the pressure relief protection structure in the pressure relief state.

[0033] Figure 12 This is a cross-sectional view of the pressure relief protection structure of a multi-layer watch provided in the third embodiment of the present invention.

[0034] Figure 13 yes Figure 12 Cross-sectional view of the pressure relief protection structure in the pressure relief state.

[0035] Figure 14 This is a cross-sectional view of the pressure relief protection structure of a multi-layer watch provided in the fourth embodiment of the present invention.

[0036] Figure 15 yes Figure 14 Cross-sectional view of the pressure relief protection structure in the pressure relief state.

[0037] Figure 16 This is a cross-sectional view of the pressure relief protection structure of the multi-layer watch provided in the fifth embodiment of the present invention in the pressure relief state. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0040] The terms "first" and "second" used in the terminology of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as limiting the order of events.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Please see Figure 1 and Figure 2 A preferred embodiment of the present invention provides a multi-layered watch 100, which includes a pressure relief protection structure 6. For example... Figure 3 and Figure 4 As shown, the multi-layered watch 100 has a waterproof vapor chamber 30 inside. The pressure relief channel 60 of the pressure relief protection structure 6 connects the outside of the multi-layered watch 100 with the waterproof vapor chamber 30. The waterproof vapor chamber 30 inside the multi-layered watch 100 can prevent liquids and moisture from entering the internal watch movement 900, thereby ensuring the normal operation of the watch movement 900.

[0043] like Figure 3 As shown, the multi-layered watch 100, from the inside out, comprises a sealed cavity 90, a first sealing structure 10, a waterproof vapor chamber 30, and a second sealing structure 20. The sealed cavity 90 houses the watch movement 900 and is sealed within the first sealing structure 10. The waterproof vapor chamber 30 is filled with liquid (not shown) and is sealed between the first sealing structure 10 and the second sealing structure 20, thereby sealing the liquid between them. Preferably, the liquid is water, but other liquids capable of mixing water vapor can also be used.

[0044] The first sealing structure 10 seals the sealing cavity 90 to prevent liquid from the waterproof cavity 30 from entering the sealing cavity 90 and contacting the watch movement 900. The second sealing structure 20 isolates the waterproof cavity 30 from the outside of the multi-layer watch 100, preventing liquid leakage from the waterproof cavity 30. When the multi-layer watch 100 is in a humid environment, if moisture passes through the second sealing structure 20, it will enter the waterproof cavity 30, come into contact with the liquid, cool, and merge into the liquid. Therefore, it will not pass through the first sealing structure 10, preventing moisture from entering the sealing cavity 90 and damaging the internal structure of the watch movement 900, thus ensuring the normal operation of the multi-layer watch 100.

[0045] In this embodiment, as Figure 3As shown, the multi-layered watch 100 includes an inner case 1 and an outer case 2. The inner case 1 is disposed inside the outer case 2. A first sealing structure 10 is disposed on the inner case 1, sealing the sealing cavity 90 and the watch movement 900 within the inner case 1. A second sealing structure 20 is disposed on the outer case 2, sealing the inner case 1 within the outer case 2. A waterproof cavity 30 is located between the inner case 1 and the outer case 2. By disposing of the first sealing structure 10 and the second sealing structure 20 on the inner case 1 and the outer case 2 respectively, the first sealing structure 10 and the second sealing structure 20 can be relatively independent, allowing for separate assembly and disassembly, thus preventing liquid in the waterproof cavity 30 from contacting the watch movement 900 during assembly and disassembly. During disassembly, the outer case 2 is first opened to expose the waterproof cavity 30, and the liquid inside is drained completely before opening the inner case 1 to maintain the watch movement 900, thereby completely preventing the watch movement 900 from contacting the liquid.

[0046] Combination Figure 5 , Figure 6 and Figure 7 As shown, the multi-layered watch 100 is provided with a pressure relief protection structure 6. The pressure relief protection structure 6 includes a pressure relief channel 60, a pressure relief component 61, and a pressure relief elastic component 62. The pressure relief channel 60 connects the inner and outer sides of the multi-layered watch 100. More specifically, the pressure relief channel 60 connects the outer side of the multi-layered watch 100 with the waterproof vapor chamber 30 inside the multi-layered watch 100. The pressure relief component 61 is slidably engaged with the pressure relief channel 60, and the relative sliding direction between the two is the axial direction of the pressure relief channel 60, so that the pressure relief component 61 can move between a sealed position and a pressure relief position. The sealed position is closer to the waterproof vapor chamber 30 inside the multi-layered watch than the pressure relief position, which allows the pressure relief component 61 to move closer to or further away from the waterproof vapor chamber 30 inside the multi-layered watch 100. The pressure relief elastic component 62 is connected between the pressure relief component 61 and the pressure relief channel 60, and is used to provide a force to the pressure relief component 61 to move towards the waterproof vapor chamber 30.

[0047] like Figure 7 As shown, when the pressure relief component 61 is in the sealed position, it is in a sealed fit with the pressure relief channel 60, and the pressure relief protection structure 6 is in a sealed state. In the event of excessive pressure within the waterproof vapor chamber 30, under the internal pressure of the waterproof vapor chamber 30, the pressure relief component 61 can overcome the force of the pressure relief elastic component and move towards the pressure relief position, such as... Figure 8As shown, when the pressure relief component 61 moves to the pressure relief position, it engages with the pressure relief channel 60 with a clearance fit, and the waterproof vapor chamber 30 is in communication with the outside of the multi-layered watch 100 to release the pressure within the waterproof vapor chamber 30. The pressure relief elastic component 62 is in an elastic deformation state and can provide a force to the pressure relief component 61 to move towards the sealing position. The sealing position is closer to the inside of the multi-layered watch 100, i.e., closer to the waterproof vapor chamber 30, relative to the pressure relief position. When the pressure within the waterproof vapor chamber 30 is released to a certain extent, the pressure relief component 61 moves towards the sealing position under the action of the pressure relief elastic component 62, so that the pressure relief component 61 and the pressure relief channel 60 are sealed to limit further pressure release.

[0048] In this embodiment, as Figure 6 and Figure 7 As shown, the multi-layered watch 100 is provided with a pressure relief hole 106, which connects the outer side of the multi-layered watch 100 and the waterproof cavity 30. More specifically, the pressure relief hole 106 is provided on the outer frame 22 to connect the inner and outer sides of the outer frame 22.

[0049] like Figure 6 and Figure 7 As shown, the pressure relief protection structure 6 also includes a pressure relief pipe 63, which is disposed within the pressure relief through hole 106. The outer wall of the pressure relief pipe 63 can be press-fitted with the pressure relief through hole 106, and a sealing structure can be provided to ensure the sealing performance of both. The space within the pressure relief pipe 63 forms the pressure relief channel 60. Using the pressure relief pipe 63 to form the pressure relief channel 60 can reduce the machining accuracy requirements of the pressure relief through hole 106, and the diameter of the pressure relief through hole 106 can be set to be relatively large to facilitate machining. Here, in other embodiments, the pressure relief channel 60 can also be formed directly through the pressure relief through hole 106 without providing a pressure relief pipe 63.

[0050] like Figure 6 As shown, the pressure relief pipe 63 includes a first pressure relief pipe 631 and a second pressure relief pipe 632 coaxially arranged. The second pressure relief pipe 632 is closer to the waterproof vapor chamber 30 than the first pressure relief pipe 631. The outer diameter of the first pressure relief pipe 631 is larger than the outer diameter of the second pressure relief pipe 632, and the outer walls of the first pressure relief pipe 631 and the second pressure relief pipe 632 are transitioned by a bevel. The first pressure relief pipe 631 is press-fitted with the pressure relief through hole 106, and the second pressure relief pipe 632 is clearance-fitted with the pressure relief through hole 106. First, the second pressure relief pipe 632 is inserted into the pressure relief through hole 106, and then the first pressure relief pipe 631 is inserted into the pressure relief through hole 106 through the bevel, thereby facilitating the assembly of the pressure relief pipe 63 into the pressure relief through hole 106.

[0051] The pressure relief pipe 63 also includes a pressure relief retaining ring 633, which is coaxially arranged with the first pressure relief pipe 631 and the second pressure relief pipe 632. The first pressure relief pipe 631 is connected between the pressure relief retaining ring 633 and the second pressure relief pipe 632. The outer diameter of the pressure relief retaining ring 633 is larger than the outer diameter of the first pressure relief pipe 631, and a pressure relief outer step is formed between the outer peripheral surfaces of the pressure relief retaining ring 633 and the first pressure relief pipe 631. When assembling the pressure relief pipe 63, the pressure relief outer step formed by the pressure relief retaining ring 633 can block the outer edge of the pressure relief through hole 106, which can limit the depth of the pressure relief pipe 63 inserted into the case 2 of the multi-layer structure watch, while ensuring that the pressure relief pipe 63 is properly assembled.

[0052] In this embodiment, as Figure 6 and Figure 7 As shown, the pressure relief component 61 includes a pressure relief column 611 and a pressure relief crown 612. The pressure relief column 611 is slidably disposed in the pressure relief channel 60 along the axial direction of the pressure relief channel 60. The pressure relief column 611 has an inner pressure relief end 611b and an outer pressure relief end 611a. The inner pressure relief end 611b is closer to the waterproof cavity 30 inside the multi-layer structure watch 100 than the outer pressure relief end 611a. The inner pressure relief end 611b is connected to the pressure relief elastic element 62. The pressure relief crown 612 is located at the outer pressure relief end 611a. The pressure relief crown 612 is threadedly connected to the opening of the pressure relief channel 60 to restrict the movement of the pressure relief column 611. The pressure relief column 611 and / or the pressure relief crown 612 can be sealed with the pressure relief channel 60. In this embodiment, the pressure relief crown 612 is sealed with the pressure relief channel 60 to seal the pressure relief column 611 inside the pressure relief channel 60.

[0053] The inner edge of the pressure relief inner end 611b is provided with a first limiting part 6111, and the inner wall of the pressure relief channel 60 is provided with a second limiting part 6011. The pressure relief elastic element 62 is a compression spring, sleeved on the pressure relief column 611, and located between the first limiting part 6111 and the second limiting part 6011. When the pressure relief column 611 moves outward toward the multi-layer structure watch 100, the first limiting part 6111 and the second limiting part 6011 move closer to each other, causing the elastic element to compress. The elastic element can then provide a force to the pressure relief column 611 to move toward the waterproof vapor chamber 30. By utilizing the cooperation of the first limiting part 6111, the second limiting part 6011, and the pressure relief elastic element 62, the pressure relief protection structure 6 can automatically return to a sealed state after appropriate pressure relief, while preventing the pressure relief column 611 from falling out of the pressure relief channel 60.

[0054] In this embodiment, the pressure relief column 611 and the pressure relief crown 612 are fixedly connected, and both can move or be positioned simultaneously. When the pressure relief crown 612 is threadedly connected to the inlet of the pressure relief channel 60, the pressure relief crown 612 can restrict the movement of the pressure relief column 611 within the pressure relief channel 60 and keep the pressure relief component 61 and the pressure relief channel 60 in a sealed state. Due to the thread between the pressure relief crown 612 and the inlet of the pressure relief channel 60, the pressure relief component 61 can only move within the pressure relief channel 60 by rotating the pressure relief crown 612 under the action of external force.

[0055] like Figure 8 As shown, when the pressure relief crown 612 is separated from the thread at the entrance of the pressure relief channel 60, that is, when the pressure relief crown 612 is in the unscrewed state, the pressure relief component 61 as a whole can move within the pressure relief channel 60 to open or seal the pressure relief channel 60.

[0056] The pressure relief crown 612 restricts the movement of the pressure relief column 611. When pressure needs to be released, the user can rotate the pressure relief crown 612 to release pressure, thus avoiding automatic pressure release when it is not necessary.

[0057] More specifically, such as Figure 7 and Figure 8 As shown, the pressure relief crown 612 includes a pressure relief plate 6121, a pressure relief ring 6122, and a central post 6123. The pressure relief ring 6122 is fixedly disposed along the periphery of the pressure relief plate 6121. The central post 6123 is coaxially disposed with the pressure relief ring 6122 and is located inside the pressure relief ring 6122. One end of the central post 6123 is fixedly connected to the pressure relief plate 6121. The other end of the central post 6123 is disposed opposite to the pressure relief outer end 611a.

[0058] The pressure relief ring 6122 is threadedly connected to the opening of the pressure relief channel 60. More specifically, the inner surface of the pressure relief ring 6122 is threadedly connected to the outer circumferential surface of the pressure relief retaining ring 633 of the pressure relief pipe 63, so as to facilitate the placement of the pressure relief column 611 within the pressure relief channel 60. The pressure relief retaining ring 633 is located between the pressure relief pipe 63 and the pressure relief ring 6122.

[0059] In this embodiment, the central column 6123 is sealed to the pressure relief channel 60. Through the sealing structure between the central column 6123 and the pressure relief channel 60, the pressure relief component 61 and the pressure relief channel 60 can be sealed, thereby sealing the pressure relief column 611 within the pressure relief channel 60.

[0060] A pressure relief sealing ring 602 is provided inside the pressure relief channel 60. Specifically, a pressure relief ring groove 601 is provided on the inner wall of the pressure relief channel 60, and the pressure relief sealing ring 602 is placed inside the pressure relief ring groove 601. The pressure relief sealing ring 602 can be positioned on the inner wall of the pressure relief channel 60 through the pressure relief ring groove 601, so that the pressure relief sealing ring 602 will not move when the pressure relief component 61 moves. The pressure relief sealing ring 602 is connected to the outer wall of the central column 6123 to achieve a sealed connection between the pressure relief crown 612 and the pressure relief channel 60.

[0061] like Figure 7 As shown, when the pressure relief component 61 is in the sealed position, the pressure relief crown 612 is in contact with and sealed to the pressure relief sealing ring 602; as Figure 8 As shown, when the pressure relief component 61 moves to the pressure relief position, the central post 6123 of the pressure relief crown 612 separates from the pressure relief sealing ring 602. In other embodiments, the pressure relief sealing ring can also be disposed on the outer circumferential surface of the pressure relief retaining ring, such that the pressure relief sealing ring is located between the pressure relief retaining ring and the pressure relief ring, thereby achieving contact and separation between the pressure relief crown and the pressure relief sealing ring.

[0062] In this embodiment, the sealing between the pressure relief component 61 and the pressure relief channel 60 is achieved through a sealing fit between the pressure relief crown 612 and the pressure relief channel 60. This seals the pressure relief elastic component 62 and other structures within the outer casing 2, preventing liquid from remaining at the pressure relief elastic component 62 and causing corrosion due to contact with outside air. In other embodiments, the sealing structure between the pressure relief component 61 and the pressure relief channel 60 can also be located between the pressure relief column 611 and the pressure relief channel 60; alternatively, both the pressure relief column 611 and the pressure relief crown 612 can be sealed to the pressure relief channel 60.

[0063] The central column 6123 is tubular, and its inner surface is threaded to the pressure-relieving outer end 611a of the pressure-relieving column 611, and is always kept in a tightened state to facilitate the fixed assembly of the central column 6123 and the pressure-relieving pipe 63. A slot is provided on the end face of the pressure-relieving inner end 611b of the pressure-relieving column 611 to allow the central column 6123 to be tightened to the pressure-relieving column 611 using a flathead screwdriver. In other embodiments, the central column 6123 and the pressure-relieving column 611 can also be fixedly connected by an interference fit. The cooperation between the central column 6123 and the pressure relief column 611 allows the pressure relief column 611 and the pressure relief crown 612 to be connected as a single unit, enabling them to move as a whole. During pressure relief operations, neither the pressure relief crown 612 nor the pressure relief column 611 will be removed from the multi-layered watch 100, thus preventing the pressure relief crown 612 from falling off and being lost during pressure relief. When the pressure relief protection structure 6 is in a sealed state, only one of the pressure relief column 611 and the pressure relief crown 612 needs to be sealed to the pressure relief channel 60, rather than both of them needing to be sealed to the pressure relief channel 60, which simplifies the structure and reduces costs. Of course, based on this embodiment, both the pressure relief column 611 and the pressure relief crown 612 can also be sealed.

[0064] When the pressure relief protection structure 6 is in a sealed state, the central column 6123 of the pressure relief pipe 63 is connected and sealed with the pressure relief sealing ring 602. When pressure relief is required, the pressure relief crown 612 is loosened. As the pressure relief crown 612 moves the pressure relief column 611 away from the waterproof vapor chamber 30, the central column 6123 of the pressure relief crown 612 moves axially away from the position in contact with the pressure relief sealing ring 602, causing the central column 6123 and the pressure relief sealing ring 602 to misalign, thereby releasing the seal and putting the pressure relief protection structure 6 in an open state. The waterproof vapor chamber 30 is connected to the outside through the gap between the pressure relief channel 60, the pressure relief column 611, and the pressure relief crown 612, allowing for pressure relief.

[0065] In this embodiment, as Figure 3 As shown, the inner shell 1 is suspended within the outer shell 2, allowing the waterproof vapor chamber 30 and its liquid to be more fully enclosed outside the inner shell 1, thus achieving a better waterproof vapor-proof effect. See also Figure 3 A support member 3 connects the outer wall of the inner shell 1 to the inner wall of the outer shell 2. The support member 3 allows the inner shell 1 to be roughly positioned within the outer shell 2. In other embodiments, the support member 3 may not be provided between the inner shell 1 and the outer shell 2, allowing them to move relative to each other. The liquid in the waterproof cavity 30 can provide a cushioning and shock absorption effect for the inner shell 1 and the watch movement 900.

[0066] In this embodiment, the support member 3 is fixedly connected between the inner shell 1 and the outer shell 2 to fix the relative positions of the inner shell 1 and the outer shell 2, preventing them from moving relative to each other, so that the user can easily observe the time shown by the watch movement 900. Here, in other embodiments, the support member 3 may not be provided between the inner shell 1 and the outer shell 2, and they may move relative to each other. The liquid in the waterproof cavity 30 can provide a buffering and shock-absorbing effect on the inner shell 1 and the watch movement 900.

[0067] Furthermore, there are two or more support members 3 arranged circumferentially around the inner shell 1. Using two or more support members 3 to support and position the inner shell 1 provides a better fixing effect. Simultaneously, the axial arrangement of the support members 3 around the inner shell 1 prevents them from obstructing the time display on the front of the inner shell 1. In this embodiment, as... Figure 2 As shown, there are three support members 3, which are respectively located at the 6 o'clock, 12 o'clock, and 9 o'clock positions of the multi-layer structure watch 100. Here, in other embodiments, there may also be two, four, or other numbers of support members 3.

[0068] like Figure 3 As shown, the first sealing structure 10 includes a first top sealing ring 101 and a first bottom sealing ring 102. The inner shell 1 includes an inner mirror 11, an inner frame 12, and an inner bottom cover 13. The inner mirror 11 and the inner frame 12 are sealed together by the first top sealing ring 101, and the inner bottom cover 13 and the inner frame 12 are sealed together by the first bottom sealing ring 102. The watch movement 900 is sealed within the enclosed space formed by the inner mirror 11, the first top sealing ring 101, the inner frame 12, the first bottom sealing ring 102, and the inner bottom cover 13. The inner shell 1 comprises three components: the inner mirror 11, the inner frame 12, and the inner bottom cover 13. Combined with the first top sealing ring 101 and the first bottom sealing ring 102, they form a sealed space to accommodate the watch movement 900, preventing liquid from contacting the watch movement 900. The inner mirror 11 can be made of a light-transmitting material so that the user can see the time displayed on the watch movement 900. In other embodiments, the endoscope 11 and the inner frame 12 can be integrally formed from a transparent material, or the inner frame 12 and the inner bottom cover 13 can be integrally formed, and the first sealing structure 10 can include only the first bottom sealing ring 102 or the first top sealing ring 101.

[0069] The support member 3 is rod-shaped, with its two ends connected to the inner frame 12 and the outer shell 2, respectively. The rod-shaped support member 3 has a relatively small volume, occupies little space in the waterproof cavity 30, and facilitates the connection between the inner frame 12 and the outer shell 2. More specifically, one end is integrally formed with the inner frame 12, and the other end is detachably fixedly connected to the outer shell 2. The integral formation of one end of the support rod with the inner frame 12 creates a seamless connection between the support member 3 and the inner frame 12, reducing the likelihood of liquid entering the inner shell 1. The other end of the support member 3 can be detached from the outer shell 2 to separate the inner shell 1 from the outer shell 2. In other embodiments, the support member 3 may also have one end integrally formed with the outer shell 2 and the other end detachably fixedly connected to the inner frame 12; the shape of the support member 3 may also be block-shaped, sheet-shaped, or other shapes.

[0070] In this embodiment, the multi-layered watch 100 also includes a crown assembly 4 for adjusting the time. The crown assembly 4 includes a crown 41 and a barringbone 42. The crown 41 is located on the outside of the multi-layered watch 100 and is connected to the watch movement 900 via the barringbone 42. The crown 41 and the barringbone 42 are located at the 3 o'clock position of the multi-layered watch 100. The three rod-shaped support members 3 and the barringbone 42 extend radially along the multi-layered watch 100 and are visible through the case 2. The user can see the three support members 3 and the barringbone 42 through the case 2, so that the three support members 3 and the barringbone 42 can function as dial indicators, making it convenient for the user to confirm the time. The barringbone 42 of the crown assembly 4 is sealed to the inner case 1 through a first crown sealing ring 43 to prevent liquid from entering the watch movement 900 through the gap between the barringbone 42 and the inner case 1; the crown 41 of the crown assembly 4 is sealed to the case 2 through a second crown sealing ring 44 to prevent liquid leakage. The first crown seal 43 can form part of the first sealing structure 10, and the second crown seal 44 can form part of the second sealing structure 20.

[0071] The second sealing structure 20 includes a second top sealing ring 201 and a second bottom sealing ring 202. The outer shell 2 includes an outer mirror 21, an outer middle frame 22 and an outer bottom cover 23. The outer mirror 21 and the outer middle frame 22 are sealed together by the second top sealing ring 201, and the outer bottom cover 23 and the outer middle frame 22 are sealed together by the second bottom sealing ring 202. The inner shell 1 is sealed within the enclosed space formed by the outer mirror 21, the second top sealing ring 201, the outer middle frame 22, the second bottom sealing ring 202 and the outer bottom cover 23.

[0072] The outer casing 2, consisting of an outer mirror 21, an outer frame 22, and an outer bottom cover 23, together with a second top sealing ring 201 and a second bottom sealing ring 202, forms a sealed space to accommodate the watch movement 900, preventing liquid from contacting the watch movement 900. The outer mirror 21 can be made of a light-transmitting material so that the user can see the time displayed on the watch movement 900. In other embodiments, the outer mirror 21 and the outer frame 22 can be integrally formed from a transparent material, or the outer frame 22 and the outer bottom cover 23 can be integrally formed, and the second sealing structure 20 only needs to include the second bottom sealing ring 202 or the second top sealing ring 201. The outer diameter of the outer mirror 21 is larger than the outer diameter of the inner casing 1, so that the three support members 3 and the bar 42 can all be visualized on the outer casing 2 through the outer mirror 21.

[0073] like Figure 3 and Figure 9 As shown, a groove 220 is provided on the side of the outer frame 22 facing the outer bottom cover 23. The other end of the support member 3 is pressed into the groove 220 by the second bottom sealing ring 202 and the outer bottom cover 23. During assembly, the other end of the support member 3 is inserted into the groove 220, and then the second bottom sealing ring 202 is placed inside the outer frame 22. The outer bottom cover 23 is then assembled with the outer frame 22. The outer bottom cover 23 applies force to the second bottom sealing ring 202, pressing the other end of the support member into the groove 220. At the same time, the second bottom sealing ring 202 achieves a sealed connection between the outer frame 22 and the outer bottom cover 23, thereby facilitating the assembly of the support member 3 and the sealing of the outer shell 2.

[0074] In this embodiment, the support member is fixedly connected between the inner shell and the outer shell to fix their relative positions. In other embodiments, the support member can also be rotatably connected between the inner shell and the outer shell, allowing them to rotate relative to each other. For example, the support member is cylindrical, and two supports are used, one at the 3 o'clock position and the other at the 9 o'clock position. The support member is rotatably connected to either the inner shell or the outer shell, allowing them to rotate laterally relative to each other, keeping the inner shell horizontal and thus facilitating the user's viewing of the time.

[0075] Combination Figure 3 and Figure 9 As shown, the side of the outer frame 22 facing the outer bottom cover 23 is stepped, and a slot 220 and a second bottom sealing ring 202 are provided on the stepped surface to facilitate the positioning and assembly of the outer bottom cover 23 and the outer frame 22.

[0076] Furthermore, the outer frame 22 has a two-step structure on the side facing the bottom cover, with a first-step surface 221 and a second-step surface 222. The first-step surface 221 is closer to the inner shell 1 than the second-step surface 222. The outer bottom cover 23 has a two-step structure around its perimeter that mates with the outer frame 22. There are two second bottom sealing rings 202, which are respectively set on the first-step surface 221 and the second-step surface 222. The slot 220 is set on the first-step surface 221. By utilizing the two-step structure between the outer bottom cover 23 and the outer frame 22 and the two second bottom sealing rings 202, the sealing performance can be effectively guaranteed, and water leakage from the slot 220 can be prevented.

[0077] An annular groove 2220 is provided on the second-level step surface 222, and a second bottom sealing ring 202 is provided in the annular groove 2220 to facilitate the positioning between the second bottom sealing ring 202 and the outer middle frame 22, and to facilitate assembly and connection.

[0078] In the pressure relief protection structure and corresponding multi-layer watch provided in the second embodiment of the present invention, the difference from the previous embodiment lies in the structure of the pressure relief protection structure 6. For example... Figure 10 and Figure 11 As shown in this embodiment, in the pressure relief protection structure 6, the pressure relief component 61 includes a pressure relief column 611 and a pressure relief crown 612. The pressure relief column 611 and the pressure relief crown 612 are two separate components that can be separated, that is, they are not connected as a whole structure. The pressure relief column 611 and the pressure relief pipe 63 can each be provided with a sealing structure with the pressure relief channel 60, or one of them can be provided with a sealing structure with the pressure relief channel 60.

[0079] Compared to the previous embodiments, the only difference in this embodiment of the pressure relief crown 612 is the matching structure between the central column 6123 and the pressure relief column 611. The structural similarities will not be described again.

[0080] More specifically, a first sealing ring 661 is provided between the central post 6123 of the pressure relief crown 612 and the pressure relief channel 60, and a second sealing ring 662 is provided between the first limiting part 6111 of the pressure relief post 611 and the pressure relief channel 60. In this embodiment, both the first sealing ring 661 and the second sealing ring 662 are positioned on the inner wall of the pressure relief channel 60. When the pressure relief component 61, i.e., the pressure relief post 611 and the pressure relief crown 612, moves along the pressure relief channel 60, it can contact or gap-fit ​​with the second sealing ring 662 and the first sealing ring 661, thereby realizing the conversion between the sealed state and the open state. Here, depending on the different structures of the pressure relief crown 612 and the pressure relief post 611, the first sealing ring 661 and the second sealing ring 662 of the sealing structure can be provided at other parts of the pressure relief crown 612 and the pressure relief post 611.

[0081] In this embodiment, when the pressure relief protection structure 6 is in a sealed state, the pressure relief crown 612 is tightened at the opening of the pressure relief channel 60. The circumferential surface of the central post 6123 of the pressure relief crown 612 contacts and engages with the first sealing ring 661, and the pressure relief post 611 contacts the second sealing ring 662, so that the pressure relief component 61 and the pressure relief channel 60 are in a sealed engagement state. Furthermore, the pressure relief crown 612 blocks the pressure relief outer end 611a of the pressure relief post 611 to restrict the movement of the pressure relief post 611, so that both the pressure relief post 611 and the pressure relief crown 612, along with the pressure relief channel 60, are locked in a sealed state.

[0082] When the pressure relief crown 612 is loosened, it moves outward from the multi-layered watch 100, misaligning with the first sealing ring 661. This creates a gap fit between the two, releasing the seal between the pressure relief crown 612 and the pressure relief channel 60. Simultaneously, a gap is formed between the pressure relief crown 612 and the pressure relief column 611. If the pressure inside the waterproof cavity 30 is too high, it will push the pressure relief column 611 outward. After moving a certain distance, the pressure relief column 611 is misaligned with the second sealing ring 662, and the two are in a gap fit. This opens the seal between the pressure relief column 611 and the pressure relief channel 60, allowing pressure relief. When the pressure drops to a certain level, the pressure relief column 611 moves towards the waterproof cavity 30 under the action of the pressure relief elastic element 62. The pressure relief column 611 contacts the second sealing ring 662, sealing the pressure relief column 611 and the pressure relief channel, stopping the pressure relief.

[0083] In this embodiment, the pressure relief column 611 and the pressure relief crown 612 are two separate components that can be separated. When the pressure relief crown 612 rotates, it will not cause the pressure relief column 611 to rotate or move, so as to avoid affecting the elastic structure. When the pressure relief column 611 moves along the pressure relief channel 60, the pressure relief column 611 will also not cause the pressure relief crown 612 to move, so as to ensure the flexibility of the movement of the pressure relief column 611 and enable it to release pressure in a timely manner.

[0084] In the multi-layered watch provided in the first and second embodiments of the present invention, the peripheral surface of the central post 6123 of the pressure relief crown 612 is sealed to the pressure relief channel 60 by a first sealing ring 661. Alternatively, other parts of the pressure relief crown 612 may be sealed to the pressure relief channel 60. In the pressure relief protection structure and corresponding multi-layered watch provided in the third embodiment of the present invention, such as... Figure 12 and Figure 13 As shown, the first sealing ring 661 is disposed on the side of the second limiting part 6011 near the pressure relief crown 612. The inner diameter of the first sealing ring 661 is larger than the outer diameter of the pressure relief outer end 611a of the pressure relief column 611, so that the first sealing ring 661 and the pressure relief outer end 611a always maintain a clearance fit. Figure 12As shown, when the pressure relief protection structure 6 is in a sealed state, the first sealing ring 661 is pressed between the second limiting part 6011 and the inner end of the central column 6123, so that the pressure relief crown 612 and the pressure relief channel 60 are in a sealed state. When pressure relief is required, loosen the pressure relief crown 612, as shown. Figure 13 As shown, the central column 6123 is separated from the first sealing ring 661, and the pressure relief crown 612 and the pressure relief channel 60 are in an open state. When the pressure in the waterproof air chamber 30 is greater than the elastic force of the pressure relief elastic element 62, the pressure relief column 611 moves to relieve pressure.

[0085] In the multi-layer structure watch 100 provided in the foregoing embodiments of the present invention, the central post 6123 of the pressure relief crown 612 is sealed to the pressure relief channel 60 by a first sealing ring 661. Alternatively, a sealing structure can be provided at other parts of the pressure relief crown 612 to achieve the sealing of the pressure relief channel 60. For example, a sealing structure can be provided between the inner wall of the pressure relief ring 6122 of the pressure relief crown 612 and the outer wall of the pressure relief tube 63, or a sealing structure can be provided between the end face of the pressure relief ring 6122 and the outer wall of the outer frame 22.

[0086] In the pressure relief protection structure 6 of the aforementioned embodiment, steam is released and pressure is relieved through the gap between the pressure relief channel 60 and the pressure relief component 61 to achieve relatively gentle pressure relief while preventing a large amount of liquid from flowing out. The main difference between the multi-layer structure watch and pressure relief protection structure provided in the fourth embodiment of the present invention and the aforementioned embodiment lies in the pressure relief protection structure 6. For example... Figure 14 and Figure 15 As shown, the pressure relief column 611 and pressure relief crown 612 of the pressure relief protection structure 6 are two separate components that can be separated. The pressure relief column 611 has a through pressure relief channel 610 arranged along the axial direction. A sealing plug 64 is provided at the pressure relief outer end 611a of the pressure relief column 611. The sealing plug 64 includes an integrally formed sealing column 641 and a sealing edge 642. The sealing column 641 is inserted and sealed in the pressure relief channel 610. The sealing edge 642 abuts against the pressure relief outer end 611a and against the second limiting part 6011. When the pressure relief protection structure 6 is in a sealed state, the sealing edge 642 is pressed between the pressure relief crown 612 and the second limiting part 6011, thereby realizing the sealed connection between the pressure relief component 61 and the pressure relief channel 60.

[0087] The outer periphery of the sealing edge 642 is fitted with the inner wall of the pressure relief channel 60 through a clearance, allowing pressure relief to be achieved. When pressure relief is required, the pressure relief crown 612 is loosened. If the pressure inside the waterproof vapor chamber 30 is too high, it will push the pressure relief column 611 toward the pressure relief crown 612. The pressure relief column 611 drives the sealing plug 64 to move, and the sealing edge 642 of the sealing plug 64 separates from the second limiting part 6011, so that the pressure relief channel 60 is in the open state, and pressure relief is achieved through the gap between the sealing plug 64 and the inner wall of the pressure relief channel 60.

[0088] After opening the pressure relief crown 612, the sealing plug 64 can be pulled out, and pressure can be quickly released using the pressure relief channel 610. Simultaneously, liquid can also be injected into the waterproof cavity 30 using the pressure relief channel 610. To facilitate the removal of the sealing plug 64, as in the multi-layer structure watch 100 provided in the fifth embodiment of the present invention, such as... Figure 16 As shown, the sealing plug 64 is also provided with a pull ring 643, and the sealing edge 642 is located between the pull ring 643 and the sealing post 641. The pressure relief crown 612 is provided with a clearance groove 6120 corresponding to the position of the pull ring 643. When the pressure relief crown 612 is removed, the pull ring 643 can be exposed, and the sealing plug 64 can be easily removed using the pull ring 643.

[0089] In the above embodiments, the inner case 1 and outer case 2 of the multi-layer structure watch 100 are independently separable components. As another embodiment, some components between the inner case 1 and the outer case 2 can be integrated as a whole. For example, the inner lens 11 of the inner case 1 and the outer lens 21 of the outer case 2 can be integrally formed, which can prevent gas from obstructing the time display area. The inner bottom cover 13 of the inner case 1 and the outer bottom cover 23 of the outer case 2 can also be integrally formed, so that the waterproof cavity 30 can be sealed to the inner case 1 during assembly.

[0090] In the above embodiments, the support member is rod-shaped and connected between the inner middle frame and the outer middle frame. In other embodiments, the support member can also be plate-shaped and disposed between the endoscope and the outer endoscope, as well as between the inner bottom shell and the outer bottom shell, as long as it can realize the connection between the inner shell and the outer shell.

[0091] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A pressure relief protection structure for pressure relief of a multi-layer structure watch, which is convenient for pressure relief, characterized in that, The pressure relief protection structure comprises a pressure relief channel, a pressure relief piece and a pressure relief elastic piece, the pressure relief channel is communicated with the inside and outside of the multi-layer structure watch; the pressure relief piece comprises a pressure relief column and a pressure relief crown, the pressure relief column is arranged in the pressure relief channel in the axial sliding mode along the pressure relief channel, the pressure relief column has opposite pressure relief inner ends and pressure relief outer ends, the pressure relief elastic piece is connected between the pressure relief inner end and the pressure relief channel; the pressure relief column and the pressure relief crown are two independent components which can be separated; the pressure relief crown is located at the pressure relief outer end, and the pressure relief crown is screw-connected at the opening of the pressure relief channel, so as to limit the movement of the pressure relief column. A first sealing ring is arranged between the pressure relief crown and the pressure relief channel, and a second sealing ring is arranged between the pressure relief column and the pressure relief channel, and the first sealing ring and the second sealing ring are both positioned on the inner wall of the pressure relief channel. When the pressure relief protection structure is in a sealed state, the pressure relief crown is screwed at the opening of the pressure relief channel, the pressure relief crown is in contact with the first sealing ring, and the pressure relief column is in contact with the second sealing ring. When the pressure relief crown is loosened, the pressure relief crown moves towards the outside of the multi-layer structure watch, the pressure relief crown is dislocated from the first sealing ring, so that the pressure relief crown and the first sealing ring are in clearance fit, the sealing between the pressure relief crown and the pressure relief channel is released, and at the same time, a gap is formed between the pressure relief crown and the pressure relief column; if the pressure in the waterproof cavity is too large, the pressure relief column is pushed to move outward, after the pressure relief column moves a distance, the pressure relief column is dislocated from the position of the second sealing ring, and the pressure relief column and the second sealing ring are in clearance fit, the sealing between the pressure relief column and the pressure relief channel is opened, and pressure relief can be performed; when the pressure decreases to a certain extent, the pressure relief column moves towards the waterproof cavity under the action of the pressure relief elastic piece, the pressure relief column is in contact with the second sealing ring, so that the pressure relief column and the pressure relief channel are in a sealed state, and the pressure relief is stopped.

2. The pressure relief protection structure of claim 1, wherein An edge of the pressure relief inner end is provided with a first limiting part, an inner wall of the pressure relief channel is provided with a second limiting part, and the pressure relief elastic piece is a compression spring which is sleeved on the pressure relief column and located between the first limiting part and the second limiting part. The second sealing ring is arranged between the first limiting part and the pressure relief channel.

3. The pressure relief structure of claim 1, wherein The pressure relief crown comprises a pressure relief plate, a pressure relief ring and a center column, the pressure relief ring is fixedly arranged along the circumference of the pressure relief plate, the center column is coaxially arranged with the pressure relief ring, the center column is located in the pressure relief ring, and one end of the center column is fixedly connected with the pressure relief plate; the other end of the center column is arranged opposite to the pressure relief outer end, the center column is in contact with or clearance fit with the first sealing ring, and the pressure relief ring is screw-connected with the inlet of the pressure relief channel.

4. The pressure relief structure of claim 3, wherein A pressure relief through hole is arranged on the multi-layer structure watch, and the pressure relief through hole is communicated with the outside of the multi-layer structure watch and the waterproof cavity. The pressure relief protection structure further comprises a pressure relief pipe arranged in the pressure relief through hole, an outer wall of the pressure relief pipe is in interference fit with the pressure relief through hole, and a sealing structure is arranged; a space in the pressure relief pipe forms the pressure relief channel, and the pressure relief ring is in threaded connection with the pressure relief pipe.

5. The pressure relief structure of claim 4, wherein The pressure relief pipe comprises a first pressure relief pipe and a second pressure relief pipe arranged coaxially, the second pressure relief pipe is closer to the waterproof vapor cavity relative to the first pressure relief pipe, an outer diameter of the first pressure relief pipe is greater than an outer diameter of the second pressure relief pipe, and outer walls of the first pressure relief pipe and the second pressure relief pipe are transitioned through a slope; the first pressure relief pipe is in interference fit with the pressure relief through hole, and the second pressure relief pipe is in clearance fit with the pressure relief through hole.

6. The pressure relief structure of claim 5, wherein The pressure relief pipe further comprises a pressure relief blocking ring arranged coaxially with the first pressure relief pipe and the second pressure relief pipe, and the first pressure relief pipe is connected between the pressure relief blocking ring and the second pressure relief pipe; an outer diameter of the pressure relief blocking ring is greater than an outer diameter of the first pressure relief pipe, and a pressure relief outer step is formed between an outer peripheral surface of the pressure relief blocking ring and an outer peripheral surface of the first pressure relief pipe, the pressure relief outer step is blocked at an outer side edge of the pressure relief through hole, and is used for limiting a depth of insertion of the pressure relief pipe on the multi-layer structure watch; an inner surface of the pressure relief ring is in threaded connection with an outer peripheral surface of the pressure relief blocking ring.

7. The pressure relief structure of claim 3, wherein An inner wall of the pressure relief channel is provided with a second limiting portion, the first sealing ring is arranged on a side of the second limiting portion close to the pressure relief crown, an inner diameter of the first sealing ring is greater than an outer diameter of the pressure relief outer end, so that the first sealing ring and the pressure relief outer end are always in clearance fit; When the pressure relief protection structure is in a sealed state, the first sealing ring is pressed between the second limiting portion and the center column, so that the pressure relief crown and the pressure relief channel are in a sealed state.

8. A multi-layered structure watch, characterized by, The multi-layer structure watch is provided with the pressure relief protection structure of any one of claims 1-7, the multi-layer structure watch is provided with a waterproof vapor cavity, and the pressure relief channel of the pressure relief protection structure communicates an outer side of the multi-layer structure watch and the waterproof vapor cavity.

9. The multi-layered construction watch according to claim 8, wherein, The multi-layer structure watch is sequentially provided with a sealed cavity, a first resealing structure, a waterproof vapor cavity, and a second resealing structure from inside to outside; the sealed cavity is used for accommodating a watch core, the sealed cavity is sealed in the first resealing structure; the waterproof vapor cavity is filled with liquid, and the waterproof vapor cavity is sealed between the first resealing structure and the second resealing structure.

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