Vacuum-insulated watch

Abstract

The utility model discloses a vacuum heat preservation watch relates to watch technical field. The watch includes watchcase and the movement that contains in the watchcase inside, the watchcase is a sealed casing, and its inside constitutes a closed cavity for accommodating the movement, the closed cavity is the vacuum heat insulation cavity that is extracted to high vacuum degree, the integrated vacuum keeping valve is provided on the watchcase, is used for sealing and maintaining the vacuum degree in the closed cavity after the vacuum extraction procedure. The utility model provides technical scheme, through the synergic effect of high vacuum environment and internal heat insulation structure, has improved the time accuracy, operation reliability and service life of watch under the extreme temperature difference environment.

Description

Technical Field

[0001] This utility model relates to the field of watch technology, and in particular to a vacuum-insulated watch. Background Technology

[0002] Currently, the core timekeeping standard of traditional quartz watches is the quartz oscillator, whose oscillation frequency is significantly affected by ambient temperature. Temperature fluctuations alter the physical properties of the oscillator, leading to timekeeping errors. In low-temperature environments, the viscosity of the lubricating oil increases and the battery discharge efficiency decreases, further exacerbating the risk of inaccurate timekeeping or even the watch stopping. At high temperatures, internal components may experience stress due to thermal expansion and contraction, which can negatively impact the watch's lifespan and accuracy in the long run.

[0003] Current common temperature compensation technologies mainly correct the frequency through circuitry, which is a "passive response" and cannot fundamentally isolate external temperature shocks. Especially in extreme temperature environments, their compensation effect is limited, resulting in inaccurate timekeeping and poor reliability of the watch. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a vacuum-insulated watch.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A vacuum-insulated watch includes a watch case and a movement housed inside the watch case. The watch case is a sealed housing with an internal sealed cavity for accommodating the movement. The sealed cavity is a vacuum insulation cavity evacuated to a high vacuum level. An integrally formed vacuum holding valve is provided on the watch case for sealing and maintaining the vacuum level in the sealed cavity after the vacuuming process.

[0007] Preferably, the vacuum holding valve is a one-way normally closed micro valve, which is configured to open for venting when the external pressure of the housing is lower than the internal pressure, and automatically close and seal after the pressure is balanced.

[0008] Preferably, the sealed cavity is further provided with an internal heat insulation structure, which is made of a low thermal conductivity material and separates the movement from the inner wall of the watch case.

[0009] Preferably, the internal thermal insulation structure includes a movement bracket for fixing the movement, the movement bracket being made of low thermal conductivity engineering plastic or ceramic material.

[0010] Preferably, the internal heat insulation structure further includes a battery heat insulation ring sleeved on the outside of the battery, the battery heat insulation ring being made of a low thermal conductivity material.

[0011] Preferably, the case itself is made of a material with low thermal conductivity, or its inner / outer walls are covered with a low thermal conductivity insulating coating.

[0012] The vacuum-insulated watch provided by this utility model has the following advantages:

[0013] By constructing a high-vacuum cavity inside the highly sealed watch case, and supplementing it with a vacuum holding valve and internal heat insulation structure, the heat conduction and convection between the external environment and the movement are greatly blocked from a physical level, creating a highly stable micro-temperature environment for the movement. This fundamentally and significantly reduces the impact of temperature fluctuations on timekeeping accuracy, and greatly improves the watch's timekeeping accuracy, operational reliability and service life in extreme temperature environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the exploded internal structure of the watch case according to an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the vacuum holding valve in the closed state according to an embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram of the vacuum holding valve in the open state according to an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the overall structure of the watch according to an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of the overall exploded structure of the watch according to an embodiment of the present utility model;

[0019] Figure 6 This is a schematic diagram of the internal structure of the watch case according to an embodiment of the present utility model;

[0020] Figure 7 This is a schematic diagram of the internal cross-sectional structure of the watch case according to an embodiment of the present invention.

[0021] Reference numerals: 1. Watch case; 2. Movement; 20. Metal clip; 21. Movement support; 22. Battery heat shield; 3. Sealed cavity; 4. Vacuum retaining valve; 5. Watch crystal; 51. Watch crystal heat shield; 6. Crown; 61. Crown seal; 7. Case back; 71. Case back seal; 8. Battery. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0024] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0025] like Figure 1-7 As shown, the present invention provides a vacuum-insulated watch, including a case 1, a movement 2, a vacuum holding valve 4, a crystal 5, a crown 6, and a case back 7. The case 1 and these components together form a sealed shell, the interior of which constitutes a sealed cavity 3. This sealed cavity 3 is made into a high-vacuum vacuum insulation cavity through a vacuuming process to essentially eliminate heat conduction and convection from the air.

[0026] In this embodiment, the top opening of the watch case 1 is closed by a watch lens 5, which is fixedly installed in the watch lens mounting groove at the top of the watch case 1 by press fitting or bonding.

[0027] On the side of the watch case 1, there is a through hole for mounting the crown 6. The crown 6 passes through the through hole and connects to the operating stem of the movement 2. A crown sealing ring 61, such as an annular rubber sealing ring, is provided between the crown 6 and the through hole to ensure dynamic sealing performance at this location.

[0028] The bottom opening of the watch case 1 is sealed by a bottom cover 7. The bottom cover 7 is fixedly connected to the main body of the watch case 1 by means of threaded connection, press fitting, or laser welding. A bottom cover sealing ring 71 is provided at the joint between the bottom cover 7 and the watch case 1 to further enhance the static sealing effect at this point.

[0029] like Figure 2-4 As shown, in this embodiment, the interior of the housing forms a sealed cavity 3 for accommodating the movement 2. The sealed cavity 3 is a vacuum insulation cavity evacuated to a high vacuum level, with the internal vacuum level maintained below 100 Pa, more preferably 10 Pa. -1 The Pa level is used to essentially eliminate heat conduction and convection caused by air molecules, achieving excellent heat insulation effect.

[0030] In this embodiment, the watch case 1 is provided with an integrally formed vacuum holding valve 4, which is used to seal and maintain the vacuum level in the sealed cavity 3 after the vacuuming process. Specifically, a valve mounting hole is integrally formed on the side wall or bottom cover 7 of the watch case 1 by precision machining for assembling the vacuum holding valve 4. The vacuum holding valve 4 is a one-way normally closed micro valve, which contains a miniature valve disc made of corrosion-resistant elastic material (such as perfluoroelastomer rubber) and a precision valve seat. Figure 2 , Figure 3 As shown, under normal conditions, the valve disc is tightly pressed against the valve seat by the combined action of its own elasticity and external negative pressure, and automatically seals after the pressure is balanced, thereby ensuring that the high vacuum environment inside the housing 1 is maintained under normal conditions.

[0031] like Figure 4 , Figure 5 As shown, in this embodiment, the sealed cavity 3 is provided with an internal heat insulation structure. The internal heat insulation structure includes at least a low thermal conductivity movement support 21. The movement support 21 serves as the main load-bearing component of the movement 2 and is precision injection molded or sintered from a low thermal conductivity material, such as polyetheretherketone engineering plastic or zirconium oxide ceramic. The movement support 21 is connected to the inner wall of the watch case 1 through limited point contact or small area contact, thereby reducing the heat transferred from the watch case 1 to the movement 2 through solid conduction paths.

[0032] Specifically, such as Figure 5-7 As shown, in a preferred embodiment, the internal heat insulation structure further includes a battery heat insulation ring 22 sleeved on the outside of the battery. The battery heat insulation ring 22 is made of a low thermal conductivity material. The battery heat insulation ring 22 is sleeved on the outside of the battery 8 that is matched with the core 2, and is used to block direct heat conduction between the battery 8 and the metal clips 20 on the core 2, which helps to buffer external impacts.

[0033] Preferably, in this embodiment, an annular heat insulation ring 51 is provided in the watch lens mounting groove. The heat insulation ring 51 is made of an elastic material with low thermal conductivity and low gas permeability, such as perfluoroelastomer rubber or silicone rubber filled with heat-insulating microspheres. It is used to block the heat conduction path through the watch lens 5, achieve all-round thermal insulation, and effectively prevent external air from seeping in and disrupting the vacuum.

[0034] Alternatively, in another embodiment, the inner wall of the casing 1 is covered with a low thermal conductivity insulating coating, such as a microporous alumina coating or a special ceramic coating. The insulating coating can reflect thermal radiation and increase thermal resistance, and works in synergy with the vacuum cavity to achieve better thermal insulation performance.

[0035] In detail, such as Figure 3As shown, during assembly, the movement 2 is fixed by the movement bracket 21, and the battery 8 is installed with a battery heat insulation ring 22. The entire assembly is placed into the watch case 1, sealed, and vacuum-sealed. During use, when the external ambient temperature changes drastically, such as moving from a -30°C outdoor environment to a 25°C indoor environment, the high vacuum environment inside the sealed cavity 3 greatly inhibits heat conduction and convection. The internal heat insulation structure further blocks residual solid heat conduction paths, making the speed at which heat is transferred to the movement 2 extremely slow. This effectively isolates it from external temperature shocks, maintains its temperature stability, and ensures the watch's long-term accuracy and reliability.

[0036] The above is a description of a vacuum-insulated watch according to the present invention, which is used to help understand the present invention; however, the implementation of the present invention is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the principle of the present invention shall be considered as equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A vacuum-insulated watch, characterized in that, The watch includes a watch case and a movement housed inside the watch case. The watch case is a sealed housing with an internal sealed cavity for accommodating the movement. The sealed cavity is a vacuum-insulated cavity that has been evacuated to a high vacuum level. The watch case is provided with an integrally formed vacuum holding valve for sealing and maintaining the vacuum level in the sealed cavity after the vacuuming process.

2. A vacuum-insulated watch according to claim 1, characterized in that, The vacuum holding valve is a one-way normally closed micro valve, which is configured to open for venting when the external pressure of the housing is lower than the internal pressure, and automatically close and seal after the pressure is balanced.

3. A vacuum-insulated watch according to claim 1, characterized in that, The sealed cavity is also equipped with an internal heat insulation structure, which is made of a low thermal conductivity material and separates the movement from the inner wall of the watch case.

4. A vacuum-insulated watch according to claim 3, characterized in that, The internal thermal insulation structure includes a movement bracket for fixing the movement, the movement bracket being made of low thermal conductivity engineering plastic or ceramic material.

5. A vacuum-insulated watch according to claim 3, characterized in that, The internal heat insulation structure also includes a battery heat insulation ring fitted around the outside of the battery, the battery heat insulation ring being made of a low thermal conductivity material.

6. A vacuum-insulated watch according to claim 1, characterized in that, The casing itself is made of a material with low thermal conductivity, or its inner / outer walls are covered with a low thermal conductivity insulating coating.

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