Code table hidden type air vent structure and code table

Abstract

The utility model relates to a kind of code table hidden type air hole structure and code table, including shell, air pressure sensor, base, shell inside is equipped with air pressure sensor, air hole is communicated with the detection end of air pressure sensor and is set up on shell, shell bottom outer wall detachably assembled with base, the side of base towards shell is equipped with flow guide groove, one end of flow guide groove is communicated with air hole, other end forms with outside communication air inlet, air inlet is located in the cooperation surface area of base and shell.The utility model sets up air inlet in the cooperation surface area of base and shell, cannot be directly observed air inlet and flow guide groove from the exposed visible surface of code table, avoid the problem that traditional exposed type air hole destroys the integrity of code table appearance;Meanwhile, hidden type air passage formed by flow guide groove effectively avoids strong wind direct impact air hole, weakens the disturbance of airflow dynamic pressure to air pressure sensor, reduces air pressure reading fluctuation, improves the detection accuracy of altitude, slope and other cycling data.

Description

Technical Field

[0001] This utility model relates to the field of odometer technology, specifically to a hidden ventilation hole structure for odometers and an odometer. Background Technology

[0002] As the core device for recording and displaying cycling data, the accuracy of the barometer in a cycling computer is crucial to the accuracy of key data such as altitude and gradient. The barometer needs a vent to maintain pressure balance between its internal cavity and the external environment to ensure real-time and accurate measurements. Currently, most cycling computer barometers on the market have vents that are directly exposed on the casing surface, typically as circular through-holes on the back or side of the casing.

[0003] However, this exposed vent design has several drawbacks. Firstly, the exposed vent disrupts the overall aesthetic consistency of the cycling computer. In high-end cycling computer products that prioritize a refined appearance, this design appears rather jarring, lowering the product's visual quality. Secondly, during riding, the exposed vent is susceptible to direct impact from strong winds. According to Bernoulli's principle, high-speed airflow generates instantaneous dynamic pressure at the vent opening, causing fluctuations in the air pressure inside the cycling computer's cavity, which in turn leads to unstable barometer readings.

[0004] Furthermore, the exposed vent also poses a safety hazard. Because it is directly exposed, users unfamiliar with its function might use sharp objects such as needles or toothpicks to puncture the vent, damaging the internal waterproof and breathable membrane. This allows moisture and dust to enter the speedometer, damaging delicate components such as the barometer. Simultaneously, mud, insects, and other foreign objects encountered during riding can easily enter the exposed vent, causing blockage and disabling the pressure equalization function.

[0005] Therefore, there is an urgent need in this field for a barometer vent structure that can both ensure air pressure balance and achieve a concealed vent design, thereby improving the appearance, ensuring measurement accuracy, and reducing the risk of use. Utility Model Content

[0006] This utility model addresses the technical problems existing in the prior art by providing a hidden ventilation hole structure for a odometer and a odometer.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A hidden vent structure for a speedometer includes a housing, a pressure sensor, and a base. The pressure sensor is installed inside the housing, and a vent is provided on the housing that communicates with the detection end of the pressure sensor. The base is detachably mounted on the bottom outer wall of the housing. A guide groove is provided on the side of the base facing the housing. One end of the guide groove communicates with the vent, and the other end forms an air inlet communicating with the outside. The air inlet is located in the mating surface area between the base and the housing.

[0008] The beneficial effects of this utility model are: 1. By cleverly placing the air inlet on the mating surface of the base and the housing, the vent is completely invisible from any external angle after the computer is properly assembled. This eliminates the patchy look of traditional designs on the main surface of the housing, achieving a seamless, integrated design that greatly enhances the product's appearance and premium feel. Moreover, because the air inlet is perfectly hidden, users cannot see or touch it directly, completely eliminating the risk of damaging the internal waterproof and breathable membrane due to curiosity or poking it with sharp objects, thus improving the overall reliability and lifespan of the product.

[0009] 2. The unique guide channel design creates a non-linear buffered airflow path. External airflow cannot blow directly onto the vent; it must first pass through the guide channel for deflection and buffering. This effectively attenuates the dynamic pressure (Bernoulli effect) generated by strong winds, providing a relatively static and stable pressure measurement environment for the barometric pressure sensor. This fundamentally solves the problem of instantaneous fluctuations in readings, ensuring the accuracy of altitude and barometric pressure data.

[0010] 3. No additional parts are required; all functions can be achieved simply by optimizing the structure of the housing and base. The structure is simple and compact, with almost no increase in manufacturing costs. It is easy to injection mold and assemble, making it ideal for mass production.

[0011] Furthermore, a circuit board is fixedly mounted inside the housing using screws, and the pressure sensor is integrated onto the circuit board. The circuit board is secured to the housing with screws to prevent displacement during use, ensuring a stable relative position between the pressure sensor and the vent, and guaranteeing reliable air pressure communication.

[0012] Furthermore, a waterproof and breathable membrane is provided inside the vent. The waterproof and breathable membrane allows air to pass through to achieve air pressure balance, while effectively preventing moisture, dust, insects, and other foreign objects from entering the housing, thus avoiding damage to precision components such as the air pressure sensor.

[0013] Furthermore, the housing is provided with a breathable membrane mounting groove inside the vent holes. The breathable membrane mounting groove provides a dedicated mounting position for the waterproof and breathable membrane, ensuring that the waterproof and breathable membrane is coaxially aligned with the vent holes, preventing the membrane from shifting and blocking the vent holes, and ensuring breathability efficiency.

[0014] Furthermore, the waterproof and breathable membrane is a PTFE breathable membrane, and its edges are fixed to the breathable membrane mounting groove by adhesive bonding or hot pressing. PTFE breathable membranes have excellent breathability and waterproof properties, and are resistant to high and low temperatures and aging, making them suitable for the long-term material requirements of odometers.

[0015] Furthermore, the base is fixedly connected to the housing with screws. This prevents the base from becoming loose from the housing due to vibration or impact during riding, ensuring a stable connection between the air guide channel and the vent.

[0016] Furthermore, the base has an extension on the side facing the housing, and a guide groove is formed between the extension and the outer wall of the bottom of the housing. By forming the guide groove through the cooperation between the extension of the base and the outer wall of the bottom of the housing, there is no need to cut additional grooves on the base. The extension can guide the airflow in a direction, avoid turbulence in the mating area, reduce strong wind disturbance, and improve the stability of air pressure detection.

[0017] Furthermore, the inner wall of the flow guide channel is provided with a frosted surface or anti-slip texture. The frosted surface or anti-slip texture can increase the contact area between the airflow and the inner wall of the flow guide channel, reduce the airflow velocity, reduce airflow turbulence and impact, and further optimize the detection accuracy of the air pressure sensor.

[0018] A cycling computer includes the aforementioned hidden vent structure. The cycling computer with this integrated vent structure has no visible holes on the back, offering advantages such as aesthetic appeal, accurate air pressure detection, strong protection, and stable assembly. It solves the problems of poor appearance, inaccurate readings, and easy damage associated with exposed vents in traditional cycling computers. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention with the circuit board omitted. Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure; The attached diagram lists the components represented by each number as follows: 1. Housing, 2. Pressure sensor, 3. Base, 31. Extension, 4. Vent hole, 5. Guide channel, 6. Circuit board, 7. Waterproof and breathable membrane. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0023] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0024] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0025] Example like Figures 1 to 3As shown, this embodiment provides a hidden ventilation hole structure for a cycling computer, including a housing 1, a pressure sensor 2, and a base 3. The pressure sensor 2 is housed inside the housing 1, and a ventilation hole 4 is formed on the housing 1, communicating with the detection end of the pressure sensor 2. The base 3 is detachably mounted on the bottom outer wall of the housing 1. A guide groove 5 is provided on the side of the base 3 facing the housing 1. One end of the guide groove 5 communicates with the ventilation hole 4, and the other end forms an air inlet communicating with the outside. The air inlet is located in the mating surface area between the base 3 and the housing 1. This embodiment aims to avoid the problem of the traditional exposed ventilation hole 4 disrupting the integrated appearance of the cycling computer by placing the air inlet in the mating surface area between the base 3 and the housing 1, so that the air inlet and guide groove 5 cannot be directly observed from the exposed visible surface of the cycling computer, thus improving the visual quality of the product. Simultaneously, the hidden ventilation channel formed by the guide groove 5 effectively prevents strong winds from directly impacting the ventilation hole 4, weakening the disturbance of air pressure to the pressure sensor 2, reducing pressure reading fluctuations, and improving the accuracy of detecting cycling data such as altitude and gradient. Specifically: A circuit board 6 is fixedly mounted inside the housing 1 with screws, and the air pressure sensor 2 is integrated on the circuit board 6. The circuit board 6 is fixed inside the housing 1 with screws to prevent the circuit board 6 from shifting during use, ensuring the relative position of the air pressure sensor 2 and the vent 4 is stable and guaranteeing the reliability of air pressure communication. Integrating the air pressure sensor 2 into the circuit board 6 reduces the number of scattered parts inside the housing 1, simplifies the internal structure of the speedometer, reduces assembly difficulty, and improves the signal transmission stability between the sensor and other electronic components.

[0026] The inner side of the vent 4 is provided with a waterproof and breathable membrane 7. The waterproof and breathable membrane 7 allows air to pass through to achieve air pressure balance, while effectively blocking foreign objects such as water vapor, dust, and insects from entering the housing 1, preventing damage to precision components such as the air pressure sensor 2, extending the service life of the cycling computer, and preventing water vapor intrusion even in harsh riding scenarios such as rainy days and muddy roads, ensuring the normal operation of the air pressure sensor 2, and improving the environmental adaptability of the cycling computer.

[0027] The housing 1 has a breathable membrane mounting groove located inside the vent hole 4. The breathable membrane mounting groove provides a dedicated assembly position for the waterproof and breathable membrane 7, ensuring that the waterproof and breathable membrane 7 is coaxially aligned with the vent hole 4, preventing the membrane from shifting and blocking the vent hole 4, and ensuring breathability efficiency; the mounting groove can also limit the displacement of the waterproof and breathable membrane 7, preventing the membrane from falling off or shifting during use, and at the same time facilitating rapid assembly during production, improving mass production efficiency.

[0028] The waterproof and breathable membrane 7 is a PTFE breathable membrane, and its edges are fixed to the breathable membrane mounting groove by adhesive bonding or heat pressing. The PTFE breathable membrane has excellent breathability and waterproof properties, and is resistant to high and low temperatures and aging, making it suitable for the long-term use of speedometers. The edge adhesive bonding or heat pressing method ensures a stable assembly of the membrane while preventing the adhesive / heat-pressed area from covering the central breathable area of ​​the membrane, thus balancing fixation reliability and breathability. The heat pressing method also achieves a seamless fit between the membrane and the mounting groove, further enhancing the waterproof effect.

[0029] The base 3 is fixedly connected to the housing 1 by screws. The screw connection has high tightening force, which can prevent the base 3 from loosening from the housing 1 due to vibration and collision during riding, and ensure the stable connection between the air guide groove 5 and the vent 4. The base 3 can be detachably assembled to the bottom of the housing 1, which can hide and cover the vent 4 without affecting the normal layout of the air pressure sensor 2 inside the computer housing 1, thus balancing functionality and ease of assembly.

[0030] The base 3 has an extension 31 on the side facing the housing 1, and a guide groove 5 is formed between the extension 31 and the bottom outer wall of the housing 1. By forming the guide groove 5 through the cooperation between the extension 31 of the base 3 and the bottom outer wall of the housing 1, there is no need to make additional grooves on the base 3, which simplifies the injection molding process of the base 3 and reduces production costs. At the same time, the extension 31 can guide the airflow in a direction, avoid the airflow from flowing turbulently in the mating surface area, further weaken the strong wind disturbance, improve the stability of air pressure detection, and the extension 31 can also protect the guide groove 5, reducing the risk of foreign objects directly entering the guide groove 5.

[0031] The inner wall of the flow guide trough 5 is provided with a frosted surface or anti-slip texture. The frosted surface or anti-slip texture can increase the contact area between the airflow and the inner wall of the flow guide trough 5, reduce the airflow velocity, reduce airflow turbulence and impact, and further optimize the detection accuracy of the air pressure sensor 2; at the same time, the frosted surface / texture can disrupt the adhesion conditions of water vapor on the trough wall, reduce condensation formation, prevent condensation from clogging the flow guide trough 5 or seeping into the vent hole 4, and ensure that the venting channel is unobstructed for a long time.

[0032] This embodiment also provides a cycling computer, including the hidden vent structure described above, as detailed in the aforementioned embodiment, and will not be repeated here. The cycling computer integrating the aforementioned hidden vent structure has no visible holes on the back of the entire unit, offering advantages such as aesthetic appeal, accurate air pressure detection, strong protection, and stable assembly. It solves the problems of poor appearance, inaccurate readings, and easy damage associated with exposed vents in traditional cycling computers. Compared to existing cycling computer products, it significantly improves the accuracy of cycling data, appearance design, and durability, meeting users' needs for high-end cycling computers and enhancing product market recognition and competitiveness.

[0033] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A hidden ventilation hole structure for a speedometer, characterized in that, The device includes a housing, a pressure sensor, and a base. The pressure sensor is installed inside the housing, and a vent hole is opened on the housing to communicate with the detection end of the pressure sensor. The base is detachably mounted on the bottom outer wall of the housing. A guide groove is provided on the side of the base facing the housing. One end of the guide groove communicates with the vent hole, and the other end forms an air inlet communicating with the outside. The air inlet is located in the mating surface area between the base and the housing.

2. The hidden ventilation hole structure for a speedometer according to claim 1, characterized in that, A circuit board is fixedly mounted inside the housing by screws, and the air pressure sensor is integrated on the circuit board.

3. The hidden ventilation hole structure for a speedometer according to claim 1, characterized in that, A waterproof and breathable membrane is provided inside the vent.

4. The hidden ventilation hole structure for a speedometer according to claim 3, characterized in that, The housing has a breathable membrane mounting groove located inside the vent hole.

5. The hidden ventilation hole structure of the odometer according to claim 4, characterized in that, The waterproof and breathable membrane is a PTFE breathable membrane, and the edges of the waterproof and breathable membrane are fixed in the breathable membrane installation groove by adhesive or hot pressing.

6. The hidden ventilation hole structure of the odometer according to claim 1, characterized in that, The base is fixedly connected to the housing by screws.

7. The hidden ventilation hole structure of the odometer according to claim 1, characterized in that, The base has an extension on the side facing the housing, and a guide groove is formed between the extension and the outer wall of the bottom of the housing.

8. The hidden ventilation hole structure for a speedometer according to claim 1, characterized in that, The inner wall of the guide channel is provided with a frosted surface or anti-slip texture.

9. A code table, characterized in that, Includes the hidden ventilation hole structure of the codebook as described in any one of claims 1-8.

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