A modular air tightness detection tool suitable for multiple models of laser modules

Abstract

The utility model discloses a modularization air tightness detection frock suitable for multiple model laser module relates to air tightness detection equipment technical field, aims at solving the poor commonality of existing detection frock, the low change type efficiency, the problem of high cost. The frock includes upper pressure module and modularization lower support module, and modularization lower support module contains fixed outer cavity, replaceable inner core, general sealing gasket and pressure frame, and fixed outer cavity is fixed in base, and bottom is equipped with air outlet hole and air outlet pipe, replaceable inner core is plug -in part, and upper portion has the locating surface and the containing cavity matched with specific model laser module, general sealing gasket seals the clearance between replaceable inner core and fixed outer cavity, and can adhere to laser module bottom and form main seal, and pressure frame is fast pressure type locking mechanism. The utility model discloses the modularization design of " fixed outer cavity + replaceable inner core", and the change type only needs to replace inner core, does not need to debug air path and positioning reference, and can complete the change type in 1-2 minutes, and the commonality is strong, and the cost is low, and adapts multiple model laser module detection demand.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing equipment, and in particular to a modular airtightness testing fixture suitable for multiple types of laser modules. Background Technology

[0002] Laser ranging modules are widely used in various devices, and their airtightness is a key indicator for ensuring operational reliability. Due to the varying requirements of different application scenarios, the shape, size, and interfaces of laser modules are often non-standard and customized, resulting in a wide variety of models.

[0003] Existing laser module airtightness testing fixtures are mostly "one machine, one module" dedicated types, with one set of fixtures only compatible with one specific module model. When the production line needs to switch testing models, the entire fixture must be replaced or the existing fixture must undergo complex positioning calibration and airtightness debugging. The debugging process can take tens of minutes or even hours, resulting in excessive downtime and severely impacting production efficiency. Some fixtures using adjustable clamps attempt to improve versatility, but the adjustment operations are cumbersome, and it is difficult to guarantee the sealing reliability and positioning accuracy after switching between different models. This can easily lead to fluctuations in product yield due to human error in debugging. In addition, equipping multiple product models with dedicated fixtures significantly increases the costs of fixture development, manufacturing, and management, failing to meet the flexible production needs of multi-variety, small-batch production. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular airtightness testing fixture suitable for multiple laser module models, enabling rapid model changeover testing of multiple laser module models, improving testing efficiency, and reducing equipment costs.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A modular airtightness testing fixture suitable for multiple laser module models includes an upper pressure module and a modular lower support module; The modular lower bearing module includes a fixed outer cavity, a universal sealing gasket, a replaceable inner core, and a pressure frame. The fixed outer cavity is used to fix it on the tooling base. The bottom of the fixed outer cavity is provided with an air outlet, and the air outlet is connected to an air outlet pipe. The air outlet pipe is used to connect to an external bubble observation bottle. The replaceable inner core is an insertable component that can be detachably assembled into the fixed outer cavity. The upper part of the replaceable inner core is provided with a positioning surface and a receiving cavity that match the shape of the laser module to be tested. The universal sealing gasket is disposed between the fixed outer cavity and the replaceable inner core, and can fit against the bottom of the laser module to be tested; The pressure frame is a quick-press locking mechanism used to press and lock the universal sealing gasket and the replaceable inner core onto the fixed outer cavity; The upper pressure module is located directly above the modular lower support module and is used to press down on the laser module to be tested, so that the laser module to be tested fits with the universal sealing gasket to form a seal.

[0006] Furthermore, the outer wall of the replaceable inner core and the inner wall of the fixed outer cavity are in clearance fit, with a clearance of no more than 0.1 mm.

[0007] Furthermore, the universal sealing gasket is made of silicone, and the Shore hardness of the universal sealing gasket is 50-70HA.

[0008] Furthermore, the upper surface of the universal sealing gasket is provided with a groove that matches the bottom contour of the laser module to be tested, in order to improve the fit and sealing performance with the laser module to be tested.

[0009] Furthermore, the pressure frame includes a frame body and quick-lock buckles. The frame body covers the top of the fixed outer cavity, and the quick-lock buckles are disposed on both sides of the frame body for engaging and locking with the buckle seats on the sidewalls of the fixed outer cavity.

[0010] Furthermore, the inner wall of the fixed outer cavity is provided with a positioning boss, and the bottom of the replaceable inner core (23) is provided with a positioning groove that is adapted to the positioning boss, so as to realize the precise positioning of the replaceable inner core (23) in the fixed outer cavity.

[0011] Furthermore, the top of the replaceable inner core is provided with a gripping groove or gripping hole for easy handling.

[0012] Furthermore, the upper pressure module includes a driving component and a pressure head. The driving component is connected to the pressure head for driving the pressure head to move vertically up and down. An elastic buffer layer is provided at the bottom of the pressure head.

[0013] Beneficial effects: This utility model's "three-in-one" modular sealing structure innovatively separates and coordinates the fixed outer cavity (reference body), replaceable inner core (positioning body), and universal sealing gasket (sealing body). This design achieves standardization of the tooling basic frame and modularization of functional units, providing a structural foundation for rapid model changeover.

[0014] The sealing gasket of this invention has a dual sealing function: as a key component, the universal sealing gasket simultaneously performs both "static sealing" (sealing the assembly gap between the inner core and the outer cavity) and "dynamic sealing" (sealing the tested module and the tooling). This design simplifies the structure, reduces the number of parts, and ensures the consistency of the bottom sealing interface of the entire air circuit system when switching between different inner cores.

[0015] This invention utilizes a rapid changeover method based on physical isolation. By condensing the positioning functions that need to be changed due to product variations into an independent "replaceable inner core," while retaining the unchanging basic support and air passage interface in the "fixed outer cavity," physical isolation between the changing and the unchanging is achieved. The changeover process involves only a simple replacement of physical components, rather than a recalibration of a complex system. This fundamentally bypasses the repeated trial-and-error cycles of "position" and "sealing pressure" in traditional tooling debugging, turning rapid changeover from a concept into reality. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is an overall isometric view of the modular airtightness testing fixture applicable to multiple laser modules described in this embodiment of the present invention; Figure 2 This is an overall cross-sectional view of the modular airtightness testing fixture applicable to multiple laser modules as described in this embodiment of the utility model. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Example 1 See Figure 1-2 A modular airtightness testing fixture suitable for multiple laser module models, comprising an upper pressure module 1 and a modular lower support module 2; The modular lower bearing module 2 includes a fixed outer cavity 21, a universal sealing gasket 22, a replaceable inner core 23, and a pressure frame 24. The fixed outer cavity 21 is used to fix it on the tooling base. The bottom of the fixed outer cavity 21 is provided with an air outlet. The air outlet is connected to an air outlet pipe. The air outlet pipe is used to connect to the external bubble observation bottle 3. The replaceable inner core 23 is an insertable component that can be detachably assembled into the fixed outer cavity 21. The upper part of the replaceable inner core 23 is provided with a positioning surface and a receiving cavity that match the shape of the laser module 100 to be tested. The universal sealing gasket 22 is disposed between the fixed outer cavity 21 and the replaceable inner core 23, and can fit against the bottom of the laser module 100 to be tested; The pressure frame 24 is a quick-press locking mechanism used to press and lock the universal sealing gasket 22 and the replaceable inner core 23 onto the fixed outer cavity 21. The upper pressure module 1 is located directly above the modular lower support module 2 and is used to press down the laser module 100 to be tested, so that the laser module 100 to be tested fits against the universal sealing gasket 22 to form a seal.

[0020] This embodiment adopts a modular design of "fixed outer cavity + replaceable inner core". For different models of laser modules, only the replaceable inner core needs to be replaced, without the need to equip multiple complete tooling sets, which greatly improves the tooling versatility and adapts to the needs of multi-variety and small-batch production. In addition, the changeover process only requires plugging and unplugging the inner core and opening and closing the pressure frame, without the need to adjust the air circuit and positioning reference, and can be completed in 1-2 minutes, which significantly shortens the production line downtime and improves production efficiency; This embodiment of the universal sealing gasket has a dual sealing function. Combined with the precise positioning structure of the replaceable inner core and the fixed outer cavity, it ensures that the sealing reliability and positioning accuracy are consistent after each model change, reduces human adjustment error, and ensures the quality of testing. This embodiment only requires the development of replaceable inner cores of different specifications, without the need to develop a complete set of tooling, thus reducing the cost of fixture development and management; the changeover and testing operations do not require professional tools and experience, thus lowering the threshold for operators.

[0021] In a specific example, the outer wall of the replaceable inner core 23 and the inner wall of the fixed outer cavity 21 are in clearance fit, and the clearance is no greater than 0.1 mm.

[0022] This embodiment reduces shaking after the replaceable inner core is assembled by using a smaller fitting gap, ensuring positioning accuracy, and at the same time facilitating quick insertion and removal of the replaceable inner core.

[0023] In one specific example, the universal sealing gasket 22 is made of silicone and has a Shore hardness of 50-70 HA.

[0024] The silicone material in this embodiment has good elasticity and aging resistance. Its hardness of 50-70HA can ensure the ability to deform and fit during sealing, while avoiding excessive deformation that could lead to sealing failure and extending the service life of the sealing gasket.

[0025] In a specific example, the upper surface of the universal sealing gasket 22 is provided with a groove that matches the bottom contour of the laser module 100 to be tested, in order to improve the fit and sealing performance with the laser module 100 to be tested.

[0026] The groove in this embodiment can form a "nested" fit with the bottom of the laser module, increasing the sealing contact area, improving sealing reliability, and reducing sealing leaks caused by irregular shapes at the bottom of the module.

[0027] In a specific example, the pressure frame 24 includes a frame body and quick-lock buckles. The frame body covers the top of the fixed outer cavity 21, and the quick-lock buckles are disposed on both sides of the frame body for engaging and locking with the buckle seats on the side wall of the fixed outer cavity 21.

[0028] The quick-lock buckle and buckle seat of this embodiment have a matching structure that enables the quick opening and closing of the pressure frame without the need for complicated operations such as tightening screws, thus improving the efficiency of model changeover.

[0029] In a specific example, the inner wall of the fixed outer cavity 21 is provided with a positioning boss, and the bottom of the replaceable inner core 23 is provided with a positioning groove that matches the positioning boss, so as to achieve precise positioning of the replaceable inner core 23 in the fixed outer cavity 21.

[0030] This embodiment, through the cooperation of the positioning boss and the positioning groove, can quickly achieve precise positioning of the replaceable inner core in the fixed outer cavity, avoid deviation during assembly, and ensure the consistency of the positioning reference after each model change.

[0031] In one specific example, the top of the replaceable inner core 23 is provided with a gripping slot or gripping hole for easy handling.

[0032] It should be noted that operators can easily remove or insert the replaceable inner core through the gripping slot or gripping hole without the need for tools, further simplifying the replacement operation.

[0033] In a specific example, the upper pressure module 1 includes a driving component and a pressure head. The driving component is connected to the pressure head for driving the pressure head to move vertically up and down. The bottom of the pressure head is provided with an elastic buffer layer.

[0034] In this embodiment, the driving component can be a cylinder or an electric push rod to realize the automatic lifting and lowering of the pressure head; the elastic buffer layer, such as a rubber pad, can avoid rigid impact on the laser module when the pressure head is pressed down, protect the module from damage, and at the same time compensate for minor height deviations, improving the fit and sealing performance.

[0035] The detection working principle of this utility model Clamping and positioning: The replaceable inner core 23 matching the model of the laser module 100 to be tested is assembled in the fixed outer cavity 21, the universal sealing gasket 22 is placed, and it is locked by the pressure frame 24; the laser module 100 to be tested is placed into the receiving cavity of the replaceable inner core 23, and the bottom of the module is initially in contact with the universal sealing gasket 22. Seal formation: Start the upper pressure module 1, the drive unit drives the pressure head to press down, the pressure head presses the laser module tightly onto the universal sealing gasket 22, the universal sealing gasket 22 deforms elastically, and at the same time realizes the gap seal of "replaceable inner core-fixed outer cavity" and the main seal of "laser module-sealing gasket", forming a closed detection cavity; Air tightness test: Compressed air is filled from above or inside the laser module. If the laser module is airtight, there is no gas leakage and no bubbles are generated in the bubble observation bottle 3. If there is a leak in the laser module, the leaked gas will enter the cavity formed by the replaceable inner core 23 and the fixed outer cavity 21 through the gap between the module and the replaceable inner core 23, and then be introduced into the bubble observation bottle 3 through the air outlet and air outlet pipe at the bottom of the fixed outer cavity 21. The air tightness of the module can be judged by observing the bubbles.

[0036] The replacement process of this utility model When it is necessary to switch the laser module model for testing, the operator only needs 5 steps, and the whole process can be completed in 1-2 minutes: Open the quick-lock buckle of the pressure frame 24 and remove the pressure frame 24; Remove the universal sealing gasket 22 from the fixed outer cavity 21; Remove the replaceable inner core 23 that is compatible with the old model through the gripping slot / hole of the replaceable inner core 23; Insert the replaceable inner core 23 adapted to the new model laser module to ensure that the positioning groove of the replaceable inner core 23 and the positioning boss of the fixed outer cavity 21 are precisely matched. Replace the universal sealing gasket 22, cover the pressure frame 24 and fasten the quick lock buckle to complete the changeover.

[0037] The entire conversion process requires no special tools, no adjustment of the tooling's air path, drive parameters, or positioning reference, and the new model module can be tested directly after conversion.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular airtightness testing fixture suitable for multiple laser module models, characterized in that, It includes an upper pressure module (1) and a modular lower bearing module (2); The modular underbone module (2) includes a fixed outer cavity (21), a universal sealing gasket (22), a replaceable inner core (23), and a pressure frame (24). The fixed outer cavity (21) is used to fix it on the tooling base. The bottom of the fixed outer cavity (21) is provided with an air outlet. The air outlet is connected to an air outlet pipe. The air outlet pipe is used to connect to the external bubble observation bottle (3). The replaceable inner core (23) is an insertable component that can be detachably assembled into the fixed outer cavity (21). The upper part of the replaceable inner core (23) is provided with a positioning surface and a receiving cavity that match the shape of the laser module (100) to be tested. The universal sealing gasket (22) is disposed between the fixed outer cavity (21) and the replaceable inner core (23), and can fit against the bottom of the laser module (100) to be tested; The pressure frame (24) is a quick-press locking mechanism used to press and lock the universal sealing gasket (22) and the replaceable inner core (23) onto the fixed outer cavity (21); The upper pressure module (1) is located directly above the modular lower support module (2) and is used to press down the laser module (100) to be tested, so that the laser module (100) to be tested fits with the universal sealing gasket (22) to form a seal.

2. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The outer wall of the replaceable inner core (23) and the inner wall of the fixed outer cavity (21) are in clearance fit, with a clearance not greater than 0.1 mm.

3. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The universal sealing gasket (22) is made of silicone, and the Shore hardness of the universal sealing gasket (22) is 50-70HA.

4. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The upper surface of the universal sealing gasket (22) is provided with a groove that matches the bottom contour of the laser module (100) to be tested, in order to improve the fit and sealing performance with the laser module (100) to be tested.

5. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The pressure frame (24) includes a frame body and a quick-lock buckle. The frame body covers the top of the fixed outer cavity (21), and the quick-lock buckle is located on both sides of the frame body for engaging and locking with the buckle seat on the side wall of the fixed outer cavity (21).

6. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The inner wall of the fixed outer cavity (21) is provided with a positioning boss, and the bottom of the replaceable inner core (23) is provided with a positioning groove that matches the positioning boss, so as to realize the precise positioning of the replaceable inner core (23) in the fixed outer cavity (21).

7. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The top of the replaceable inner core (23) is provided with a gripping groove or gripping hole for easy picking and putting.

8. The modular airtightness testing fixture applicable to multiple laser module models according to claim 1, characterized in that, The upper pressure module (1) includes a driving component and a pressure head. The driving component is connected to the pressure head for driving the pressure head to rise and fall vertically. The bottom of the pressure head is provided with an elastic buffer layer.

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