Airtight test structure of instrument

Abstract

The utility model discloses an air tightness test structure of an instrument, the instrument comprises an upper cover and a lower cover, the upper cover and the lower cover are covered and locked up and down to form a closed space, and the closed space is used for accommodating internal parts of the instrument; the upper cover is provided with at least one screw hole, the lower cover is provided with a screw column corresponding to the screw hole, and the screw column is provided with a stud hole corresponding to the screw hole; screws penetrate through the screw holes and are locked in the stud holes of the studs, so that the upper cover and the lower cover are locked and fixed together; the top surface of the screw column is tightly attached to the peripheral wall of the screw hole of the upper cover; wherein the side surface of one screw column is provided with a notch which radially penetrates through the closed space and the screw column hole, and the screw hole corresponding to the screw column with the notch is used as an inflation air inlet hole for an air tightness test. Air is inflated through the screw hole and enters the closed space of the instrument from the notch, so that air pressure balance is realized in the instrument, air pressure balance detection is carried out, the aim of testing the sealing performance of the instrument is fulfilled, and the appearance and durability of a product are not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments, in particular to an airtight testing structure of an instrument. Background Art

[0002] Motorcycles and two-wheeled electric vehicles have been widely used as means of transportation. Motorcycles and two-wheeled electric vehicles are generally equipped with instruments. As the window of the vehicle, the instrument provides the driver with easy-to-observe information on vehicle operating parameters such as driving speed, fuel consumption / energy consumption, mileage, etc.

[0003] Since motorcycles or electric vehicles are easily wetted by rain when used or parked outdoors, in order to ensure the waterproof sealing of the instrument, an airtightness test is required before the instrument leaves the factory; the existing instrument structure requires a hole to be drilled in a blank place, and the air nozzle is aligned with the hole to inflate, so as to perform an air pressure balance test on the instrument and measure the airtightness of the instrument; however, drilling a hole in a blank place not only affects the appearance and structural stability of the product, but also requires the hole to be re-sealed later, which increases the risk of water ingress into the instrument itself. Utility Model Content

[0004] The utility model aims to provide an airtight test structure for an instrument, which has the advantages of convenient airtight test and no influence on product appearance and durability.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] An airtight test structure for an instrument, the instrument comprising an upper cover and a lower cover, the upper cover and the lower cover are locked together to form a closed space, the closed space is used to accommodate internal parts of the instrument;

[0007] The upper cover has at least one screw hole, the lower cover is provided with a screw column corresponding to the screw hole, and the screw column is provided with a stud hole aligned with the screw hole;

[0008] The upper cover and the lower cover are locked together by passing the screws through the screw holes and locking them into the stud holes of the screw columns; the top surface of the screw columns is tightly fitted with the outer peripheral wall of the screw holes of the upper cover; a cutout is provided on the side of one of the screw columns, which radially penetrates the enclosed space and the stud holes, and the screw hole corresponding to the screw column with the cutout serves as an air inlet hole for the airtight test.

[0009] Furthermore, a plurality of screw holes and screw posts are provided between the upper cover and the lower cover, and only one screw post is provided with the cutout.

[0010] Furthermore, the cutout is arranged at the top of the screw column and is connected to the top surface of the screw column.

[0011] Furthermore, the depth of the incision along the axial direction of the screw column is 0.5mm-2mm.

[0012] Furthermore, the width of the incision along the tangential direction of the screw column is 0.5mm-2mm.

[0013] Furthermore, an internal thread is provided in the stud hole.

[0014] After adopting the above technical solution, when conducting an airtight test on the instrument, first lock and fix the upper and lower covers of the instrument and place them on the corresponding fixture, then align the air-tightness test device's inflating nozzle with the screw hole corresponding to the incision and press it tightly, inflate through the screw hole, and the gas will enter the enclosed space of the instrument from the incision, so that the air pressure inside the instrument can achieve air pressure balance, and perform air pressure balance detection to achieve the purpose of testing the airtightness of the instrument without affecting the product's appearance and durability. When the test is completed, the screw hole is fixed and sealed by screw locks to prevent liquid from penetrating from the screw hole through the incision and ensure the airtightness of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A cross-sectional schematic diagram of an embodiment of the utility model;

[0016] Figure 2 for Figure 1 A magnified image of point A;

[0017] Figure 3 A three-dimensional diagram of an upper cover according to an embodiment of the utility model;

[0018] Figure 4 A three-dimensional diagram of a lower cover according to an embodiment of the present utility model;

[0019] Figure 5 for Figure 4 Enlarged view of point B.

[0020] Explanation of reference numerals: instrument 10 , upper cover 1 , lower cover 2 , enclosed space 3 , screw hole 4 , screw column 5 , stud hole 51 , cutout 52 , depth D , width H , inflation nozzle 20 . DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] like Figures 1 to 5As shown, an airtight test structure of an instrument of the utility model is provided. The instrument 10 comprises an upper cover 1 and a lower cover 2. The upper cover 1 and the lower cover 2 are locked together to form a closed space 3. The closed space 3 is used to accommodate internal parts of the instrument 10.

[0023] The upper cover 1 has at least one screw hole 4, the lower cover 2 is provided with a screw column 5 corresponding to the screw hole 4, and the screw column 5 is provided with a stud hole 51 aligned with the screw hole 4;

[0024] The upper cover 1 and the lower cover 2 are locked and fixed together by passing the screw 6 through the screw hole 4 and locking it into the stud hole 51 of the screw column 5; the top surface of the screw column 5 is tightly fitted with the outer peripheral wall of the screw hole 4 of the upper cover 1; a cutout 52 is provided on the side of one of the screw columns 5, which radially penetrates the enclosed space 3 and the stud hole 51, and the screw hole 4 corresponding to the screw column 5 with the cutout 52 is used as an inflation air inlet hole for the airtight test.

[0025] Thus, when the air tightness test of the meter 10 is performed, the upper cover 1 and the lower cover 2 of the meter 10 are first locked and fixed, and placed on the corresponding fixture, and then the air-tightness test device's air-tightness nozzle 20 is aligned with the screw hole 4 corresponding to the cutout 52 and pressed tightly, and the air is inflated through the screw hole 4. The gas will enter the enclosed space 3 of the meter 10 from the cutout 52, so that the air pressure inside the meter 10 is balanced, and the air pressure balance test is performed to achieve the purpose of testing the tightness of the meter 10 without affecting the product appearance and durability. When the test is completed, the screw hole 4 is locked and fixed and sealed by the screw 6, which can prevent liquid from penetrating from the screw hole 4 through the cutout 52, ensuring the tightness of the meter 10, and a sealing gasket can be set on the screw 6 to further enhance the tightness.

[0026] In this embodiment, a plurality of screw holes 4 and screw columns 5 are provided between the upper cover 1 and the lower cover 2 , but only one screw column 5 is provided with the cutout 52 .

[0027] The cutout 52 of the present embodiment is disposed at the top of the screw column 5 and is connected to the top surface of the screw column 5 , which facilitates the manufacture of the cutout 52 .

[0028] Preferably, the depth D of the cutout 52 along the axial direction of the screw column 5 is 0.5 mm-2 mm, and the width H of the cutout 52 along the tangential direction of the screw column 5 is 0.5 mm-2 mm, so as to ensure that the screw 6 and the screw column 5 can be inflated without affecting the locking.

[0029] The stud hole 51 may be provided with an internal thread to facilitate locking of the screw 6 .

[0030] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.

Claims

1. An airtight test structure for an instrument, characterized in that: The instrument comprises an upper cover and a lower cover, which are locked together to form a closed space, and the closed space is used to accommodate the internal parts of the instrument; The upper cover has at least one screw hole, the lower cover is provided with a screw column corresponding to the screw hole, and the screw column is provided with a stud hole aligned with the screw hole; The upper cover and the lower cover are locked together by passing the screws through the screw holes and locking them into the stud holes of the screw columns; the top surface of the screw columns is tightly fitted with the outer peripheral wall of the screw holes of the upper cover; a cutout is provided on the side of one of the screw columns, which radially penetrates the enclosed space and the stud holes, and the screw hole corresponding to the screw column with the cutout serves as an air inlet hole for the airtight test.

2. The airtight test structure of an instrument according to claim 1, characterized in that: A plurality of screw holes and screw columns are arranged between the upper cover and the lower cover, and only one screw column is provided with the cutout.

3. The airtight test structure of an instrument according to claim 1, characterized in that: The cutout is arranged at the top of the screw column and is connected to the top surface of the screw column.

4. The airtight test structure of an instrument according to claim 3, characterized in that: The depth of the incision along the axial direction of the screw column is 0.5mm-2mm.

5. The airtight test structure of an instrument according to claim 4, characterized in that: The width of the incision along the tangential direction of the screw column is 0.5mm-2mm.

6. The airtight test structure of an instrument according to claim 1, characterized in that: An internal thread is arranged in the stud hole.

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