Waterproof monocoque wristwatch case with overpressure watch crystal removal mechanism
The monocoque housing with a press-fit watch glass and compressed air ejection mechanism addresses the sealing and maintenance issues of traditional wristwatch cases, providing a watertight seal and easy access to internal components.
Patent Information
- Application Number
- DE202024001801
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-19
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Traditional wristwatch cases with screwed or pressed case covers have multiple sealing surfaces prone to water ingress, requiring separate components and complicating maintenance, and the glass assembly makes internal access difficult.
A monocoque housing design with a press-fit watch glass and glass seal, using a hand lever press for assembly, and a compressed air mechanism to eject the glass for maintenance, allowing easy access to internal components.
The design ensures a watertight seal and easy maintenance by enabling the watch glass to be ejected using compressed air, maintaining the integrity of the watch case while facilitating access to internal components without damage.
Smart Images
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Abstract
Description
[0001] Conventional wristwatch cases typically feature a screwed or pressed-on case cover, usually located on the underside. This design therefore has multiple sealing surfaces, where the likelihood of water ingress is higher. This is especially true because several components, such as the case cover, must be specially manufactured.
[0002] The invention specified in claim 1 is based on the problem of producing a watch case from a single blank, whereby no further components such as a case cover are required and a simple assembly / disassembly of the watch glass and thus the maintenance of the internal components such as the movement, hands or dial are made easy and quick.
[0003] This problem is solved by the features listed in claim 1.
[0004] The watch crystal (2) and, if applicable, the corresponding glass seal (3) are pressed from the top into the glass seat of the monocoque case (1) using a hand-lever press. The hole (4), located between the lugs, is then sealed with a suitable cylinder-head screw (9) and the corresponding O-ring (10).
[0005] The monocoque housing (1) is now sealed watertight.
[0006] Normally, access for maintenance purposes would no longer be possible due to the pressed-in watch glass (2), as the watch glass (2) would have to be destroyed to access the internal components for maintenance.
[0007] By means of the invention it is achieved that the watch glass (2) is pressed out of the glass seat by means of an introduced overpressure by means of a hand air pump or compressor and thus the watch glass can be dismantled in order to gain access to the internal watch components such as the hands, dial and clockwork.
[0008] To disassemble the watch crystal, remove the cylinder head screw (9) and the corresponding O-ring (10) located in the hole (4) located on the outer surface or between the lugs of the monocoque watch case (1). The compressed air connection is then screwed into the hole (4). This creates an airtight connection between the compressed air connection (8) and the monocoque watch case (1).
[0009] The compressed air connection (8) is connected to the compressed air hose (11) of a hand air pump or other compressed air source. The pressure in the monocoque watch case is slowly increased using the hand air pump. Depending on how tightly the watch crystal (2) sits in the glass seat, the resulting overpressure of approximately 1-5 bar pushes the watch crystal out of the glass seat or the seal seat from inside the monocoque watch case (1).
[0010] In order to avoid deformation of the dial (6) due to the short-term prevailing pressure difference within the monocoque wristwatch case (1), which results from the pressing out of the watch glass (2) and the subsequent pressure drop to normal ambient pressure, ventilation slots (7) are incorporated in the dial (6).
[0011] An embodiment of the invention is described with reference to Fig. 1 to Fig. 6 explains
[0012] They show: In Fig. 1 Illustration of the waterproof monocoque wristwatch case In Fig. 2 Illustration of the disassembly of the cylinder head screw for attaching the compressed air connection In Fig. 3 Illustration before the compressed air connection is screwed airtight to the monocoque watch case In Fig. 4 Illustration of the screwed compressed air connection with the monocoque watch case In Fig.5 Illustration of the disassembly of the watch glass by the resulting overpressure inside the monocoque wristwatch case, which was introduced via the compressed air connection and compressed air hose via a hand air pump into the monocoque wristwatch case via the hole between the strap lugs. List of reference symbols 1 monocoque housing 2 watch glass 3 Glass seal 4 Hole between the lugs 5 Crescent bag for distribution of compressed air 6 Dial 7 ventilation slots in the minute track in the dial 8 Compressed air connection 9 cylinder head screw 10 O-ring 11 Compressed air hose from hand lever pump
Claims
[1] Waterproof monocoque wristwatch case with overpressure watch glass pressing mechanism is characterized by that a threaded hole is provided between the lugs or at any position on the monocoque case to provide an airtight connection between the compressed air connection and the monocoque wristwatch case [2] Waterproof monocoque wristwatch case with overpressure watch glass squeeze mechanism is characterized by that a half-moon pocket is milled into the dial support surface inside the monocoque wristwatch case [3] Waterproof monocoque wristwatch case with overpressure watch glass - bus press mechanism is characterized by that ventilation slots are provided in the minute track to accommodate any pressure differences in the dial