Optical module hot measuring tool

Abstract

The utility model discloses an optical module hot measuring tool, comprising a cylinder, an output rod of which is vertically arranged downwards; the pressing block is fixedly connected to the tail end of an output rod of the cylinder; the stroke limiting assembly comprises a stroke limiting plate and a base which are matched with each other, and the stroke limiting plate is fixed to the bottom of the pressing block and is in stroke limiting fit with the base; the optical module mounting plate is arranged in the accommodating space of the base; the elastic pressing rod assemblies comprise pressing rods and springs, the upper ends of the pressing rods are connected with the pressing blocks, the lower ends of the pressing rods penetrate through the stroke limiting plate and correspond to the optical module installation positions in a suspended mode, the springs sleeve the peripheries of the pressing rods, and the upper ends and the lower ends of the springs abut against the pressing blocks and the bosses fixed to the pressing rods respectively. The tool provides appropriate pressure for the optical module through the elastic pressing rod and the stroke limiting structure, meanwhile, the optical module product cannot be damaged by pressing, the quality of the optical module product is guaranteed, the optical module and the heating block can be in stable contact, the speed and accuracy of thermal test detection are improved, and the thermal test efficiency of the optical module product is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing fixture technology, specifically to a thermal testing fixture for optical modules. Background Technology

[0002] For applications of optical modules, primarily in large base stations such as mobile communication base stations and data centers, product performance is crucial. An optical module typically consists of a base plate, heat pipes, a thermally conductive copper block, and fins; these four components are soldered together using a reflow soldering process. To verify the basic operating performance of the optical module and simulate its ability to maintain basic operational conditions under extreme environments, thus evaluating its reliability and stability during long-term use, a flexible thermal testing fixture is required. The common method for fixing products for thermal testing is using fasteners. However, all of these methods have drawbacks: fasteners provide a secure hold, but disassembly is complex and time-consuming; they can easily damage the product, and the small pressure area means they carry away some heat during testing, affecting the product's thermal conductivity and thus the test results; if the pressure applied by the fasteners is insufficient, the product cannot be accurately positioned, causing it to slide and resulting in poor contact with the heating block, also affecting the test results; the pressure applied by the pressure block has two drawbacks: 1. Product or tooling errors may prevent the pressure from reaching the product; 2. The applied pressure is uncontrollable, potentially damaging or crushing the product.

[0003] In summary, it is necessary to design a thermal testing fixture for optical modules that can apply appropriate pressure to the product for qualified thermal testing without damaging the product. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a thermal testing fixture for optical modules, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a thermal testing fixture for an optical module, comprising:

[0006] The cylinder has its output rod positioned vertically downwards.

[0007] The pressure block is fixedly connected to the end of the cylinder output rod;

[0008] The travel limit assembly includes a travel limit plate and a base that cooperate with each other. The travel limit plate is fixed to the bottom of the pressure block and forms a travel limit engagement with the base.

[0009] The optical module mounting plate is set within the receiving space of the base;

[0010] Several elastic pressure bar assemblies include pressure bars and springs. The upper end of the pressure bar is connected to a pressure block, and the lower end passes through a travel limit plate and hangs above the corresponding optical module mounting position. The spring is sleeved around the pressure bar, and its upper and lower ends respectively abut against the pressure block and the boss fixed to the pressure bar.

[0011] Furthermore, the travel limiting plate and the base adopt a concave-convex mating structure, the travel limiting plate is a convex structure, and the top opening of the base is provided with a corresponding concave limiting groove.

[0012] Furthermore, the travel limiting plate is provided with an opening through which the pressure rod passes.

[0013] Furthermore, a through-type air duct is provided at the rear of the base, and the air inlet of the air duct is connected to an external temperature control device.

[0014] Furthermore, a cover plate is detachably mounted on the top of the base.

[0015] Furthermore, the pressure bar is made of acetal alloy, and its end contact surface has a rounded transition structure.

[0016] Compared with existing technologies, this optical module thermal testing fixture has the following advantages: It provides appropriate pressure to the optical module through an elastic pressure bar and stroke limiting structure, without damaging the optical module product. This ensures the quality of the optical module product and stable contact between the optical module and the heating block, improves the speed and accuracy of thermal testing, greatly reduces the difficulty of operation, and improves the efficiency of thermal testing of optical module products. Attached Figure Description

[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of the optical module thermal testing fixture.

[0018] Figure 2 The diagram shown is an exploded view of the thermal testing fixture for an optical module.

[0019] Figure 3 The diagram shows the assembly structure of the pressure block, travel limit plate, and base.

[0020] Figure 4 The diagram shown is an exploded view of the pressure block, travel limit plate, and base.

[0021] Figure 5 The diagram shows the downward movement of the elastic pressure bar assembly of the optical module thermal testing fixture.

[0022] Figure 6 The diagram shows the upward movement of the elastic pressure bar assembly of the optical module thermal testing fixture;

[0023] Figure 7 The diagram shown is a rear view of the thermal testing fixture for optical modules.

[0024] In the diagram: 1. Cylinder; 2. Pressure block; 3. Stroke limit plate; 4. Base; 5. Optical module mounting plate; 6. Pressure rod; 7. Spring; 8. Boss; 9. Air duct; 10. Cover plate; 11. Output rod; 12. Gantry; 13. Optical module; 14. Base plate; 31. Opening. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7 As shown, this utility model provides a technical solution: a thermal testing fixture for an optical module, comprising:

[0027] Cylinder 1, with its output rod 11 set vertically downward, is mounted on gantry frame 12;

[0028] Pressure block 2 is fixedly connected to the end of output rod 11 of cylinder 1;

[0029] The travel limit assembly includes a travel limit plate 3 and a base 4 that cooperate with each other. The travel limit plate 3 is fixed to the bottom of the pressure block 2 and forms a travel limit cooperation with the base 4. The base 4 is set on the base plate 14.

[0030] The optical module mounting plate 5 is set in the accommodating space of the base 4. The optical module mounting plate 5 is used to place and fix the optical module 13.

[0031] Several elastic pressure bar assemblies include pressure bar 6 and spring 7. The upper end of pressure bar 6 is connected to pressure block 2, and the lower end passes through travel limit plate 3 and hangs at the corresponding optical module mounting position. Spring 7 is sleeved around the pressure bar 6, and its upper and lower ends abut against pressure block 2 and boss 8 fixed to pressure bar 6, respectively.

[0032] Please see Figure 2-3 As shown, the travel limit plate 3 and the base 4 adopt a concave-convex fit structure. The travel limit plate 3 is a convex structure, and the top opening of the base 4 is provided with a corresponding concave limiting groove. When the travel limit plate 3 contacts the base 4, the maximum downward travel is reached. The travel limit plate 3 is provided with an opening 31 for the pressure rod 6 to pass through, allowing the elastic pressure rod assembly pressure rod 6 to move up and down. The pressure rod 6 is made of acetal alloy, and its end contact surface is a rounded transition structure. Acetal alloy has insulating and heat-insulating properties, so it has little impact on the thermal conductivity and thermal test results of the product.

[0033] Please see Figure 2 , Figure 7As shown, a through-type air duct 9 is provided at the rear of the base 4. The air inlet of the air duct 9 is connected to an external temperature control device to provide temperature-controlled airflow.

[0034] Please see Figure 2-3 As shown, a cover plate 10 is detachably installed on the top of the base 4. The cover plate 10 is used to cover the base 4 to prevent airflow from leaking out. Further, according to actual production needs, the cover plate 10 can be removed so that the base 4 can simultaneously accommodate two sets of optical module mounting plates 5, enabling it to have dual-station optical module flexible thermal measurement.

[0035] Working principle of the optical module thermal testing fixture: Please refer to Figures 5-6 When cylinder 1 intakes air, it drives output rod 11 to move downwards, causing pressure block 2 and pressure rod 6 to move downwards as a whole. The downward movement stops after stroke limit plate 3 contacts base 4. At this point, the lower end of pressure rod 6 contacts the surface of the optical module. When cylinder 1 continues to apply pressure, pressure rod 6 generates elastic displacement relative to pressure block 2, and spring 7 is compressed and stores energy. The elastic pressure rod assembly provides constant contact pressure through the compression deformation of spring 7. Optical module 13 maintains stable thermal contact with the bottom heating block (not shown in the diagram) under uniform pressure. Temperature-controlled airflow is introduced through air duct 9 to achieve module temperature cycle testing. At the end of the test, cylinder 1 intakes air in the opposite direction to lift output rod 11, spring 7 releases energy to push pressure rod 6 back to its original position, and pressure block 2 drives pressure rod 6 upwards, removing it from the test position.

Claims

1. A thermal testing fixture for an optical module, characterized in that, include: The cylinder (1) has its output rod (11) set vertically downward; The pressure block (2) is fixedly connected to the end of the cylinder output rod (11); The travel limit assembly includes a travel limit plate (3) and a base (4) that cooperate with each other. The travel limit plate (3) is fixed to the bottom of the pressure block (2) and forms a travel limit cooperation with the base (4). The optical module mounting plate (5) is set in the accommodating space of the base (4); Several elastic pressure bar assemblies include pressure bars (6) and springs (7). The upper end of the pressure bar (6) is connected to the pressure block (2), and the lower end passes through the travel limit plate (3) and hangs over the corresponding optical module mounting position. The spring (7) is sleeved around the pressure bar (6), and its upper and lower ends abut against the pressure block (2) and the boss (8) fixed to the pressure bar (6) respectively.

2. The optical module thermal testing fixture according to claim 1, characterized in that, The travel limit plate (3) and the base (4) adopt a concave-convex fit structure. The travel limit plate (3) is a convex structure, and the top opening of the base (4) is provided with a corresponding concave limit groove.

3. The optical module thermal testing fixture according to claim 1, characterized in that, The travel limit plate (3) is provided with an opening (31) through which the pressure rod (6) passes.

4. The optical module thermal testing fixture according to claim 1, characterized in that, The base (4) is provided with a through-type air duct (9) at the rear, and the air inlet of the air duct (9) is connected to an external temperature control device.

5. The optical module thermal testing fixture according to claim 1, characterized in that, The base (4) is detachably fitted with a cover plate (10) on top.

6. The optical module thermal testing fixture according to claim 1, characterized in that, The pressure bar (6) is made of acetal steel, and its end contact surface has a rounded transition structure.

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