CN213240340U

CN213240340U - Special filter test fixture for high-temperature life test of filter

Info

Publication number: CN213240340U
Application number: CN202021694012.6U
Authority: CN
Inventors: 黄开文; 姚强
Original assignee: Chengdu Hongming Electronics Co Ltd
Current assignee: Chengdu Hongming Electronics Co Ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-05-18
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses a special test fixture of wave filter for test of wave filter high temperature life, comprising a base plate, the bottom plate is made by conductive metal material, bottom plate one side is installed a plurality of through locking screw and is supported the assembly plate, the bottom plate opposite side is equipped with a plurality of roof pressure and holds the piece, the roof is pressed and is held the piece and include the roof and install the spring probe on the roof, be equipped with wave filter installation volleyball on the bottom plate, be equipped with a plurality of wave filter assembly punch combination spare in the wave filter installation punch combination of bottom plate, the roof is pressed and is held the piece and support the assembly plate and pass through connecting screw and correspond and connect in the bottom plate both sides, spring probe tip cooperation is arranged in wave filter assembly punch combination spare, both ends. The utility model discloses can let the wave filter that awaits measuring firmly ground electric connection assemble on the bottom plate, spring probe also with the earthing pole elastic electric contact of the wave filter that awaits measuring simultaneously, realized the batched high temperature life quality test of wave filter that awaits measuring, it is all very convenient to install, dismantle.

Description

Special filter test fixture for high-temperature life test of filter

Technical Field

The utility model relates to a wave filter life-span test field especially relates to a special test fixture of wave filter for wave filter high temperature life test.

Background

A microminiature surface mount radio frequency interference filter with a pi-shaped circuit structure is characterized in that end electrodes 20 are arranged at two ends of the filter respectively, an earth electrode 10 is arranged in the middle of the filter, components such as capacitors are arranged in the middle of the filter corresponding to the earth electrode 10, and the two end electrodes 20 are connected through a conductive component. As shown in fig. 1, the length of the filter is not more than 8mm, the width and height dimensions are as small as 2mm, the thickness of the terminal electrode 20 is as small as 0.9mm, and the distance between the ground electrode 10 and the terminal electrode 20 is as small as 1.75 mm. The filter needs to be subjected to a life test under a high-temperature condition so as to test the influence of high temperature on the electrical and mechanical properties of a filter product, and the high-temperature life quality of the filter product can be conveniently determined through the high-temperature life test. Because the filter is small in size, the prior art generally adopts the following two modes to test the high-temperature service life, the first manual welding auxiliary test is carried out, a printed board is used as a carrier, and an intermediate shell (a grounding electrode) and electrodes at two ends of the filter are welded on the printed board by adopting electric soldering irons to test. It has the following disadvantages: (1) electrodes at two ends, a middle shell and a welding plate of the printed board are welded by adopting electric soldering irons, after the test is finished, the electric soldering irons are required to be used for removing tin, then the welding parts are cleaned, and the soldering tin is extremely difficult to be completely cleaned after the welding, so that the product cannot be continuously put into use due to the appearance quality problem; (2) the surface-mounted product is welded by an electric iron, the temperature and the time are not controlled, and the product is easily damaged by thermal stress; (3) only a few welding products in each batch can be selected and then the high-temperature service life test is carried out to ensure the delivery of the products, so that the batch test of the products is not thorough. The second reed clamp is used for auxiliary test, electrodes at two ends of the filter are clamped in the clamping grooves, and the middle shell is lapped through reeds, and voltage is applied to test. It has the following disadvantages: (1) the structure is inconvenient to assemble and disassemble, the reed is required to be pressed during assembly and disassembly, and only one product is operated; (2) the reed is an elastic structural member, is easy to deform and displace, and causes short circuit of a product electrode or does not realize good electric contact with the product; and (3) the product is fixed, is pressed in the positioning groove by the reed, and is easy to damage the appearance quality during assembly and disassembly. When the high-temperature service life is tested, the filter products are not fixed well, and are often tested by a single filter product, so that the efficiency is extremely low, and meanwhile, in the test process, the filter products cannot be ensured to realize stable electric contact, and the filter products are easily damaged.

SUMMERY OF THE UTILITY MODEL

Weak point to prior art exists, the utility model aims to provide a special test fixture of wave filter for wave filter high temperature life test, install wave filter assembly punch combination on the bottom plate, the wave filter cooperation that awaits measuring is installed in wave filter assembly punch combination, one row of wave filter that awaits measuring just cooperates the assembly in the wave filter installation row hole of bottom plate, correspond the assembly back at roof and support assembly plate, the spring probe that the roof pressure held the piece just holds the wave filter that awaits measuring on the roof, each wave filter that awaits measuring of the whole elasticity crimping of each spring probe on the roof simultaneously, can let the wave filter that awaits measuring firmly ground connection assemble on the bottom plate, spring probe also with the earthing pole elastic electrical contact of the wave filter that awaits measuring simultaneously, the batched high temperature life quality test of the wave filter that has realized awaiting measuring.

The purpose of the utility model is realized through the following technical scheme:

a special test fixture for a filter used for testing the high-temperature service life of the filter comprises a bottom plate, wherein the bottom plate is made of a conductive metal material, a plurality of supporting and assembling plates are arranged on one side of the bottom plate through locking screws, a plurality of top plate pressing and holding pieces are arranged on the other side of the bottom plate, the top plate pressing and holding piece comprises a top plate and a spring probe arranged on the top plate, the bottom plate is provided with a filter mounting row hole, the filter mounting row holes of the bottom plate, the top plate pressing and holding pieces and the supporting and assembling plates are in one-to-one correspondence, a plurality of filter assembling hole assemblies for assembling the filters are arranged in the filter mounting row holes of the bottom plate, the top plate pressing and holding piece and the supporting and assembling plate are correspondingly connected to two sides of the bottom plate through connecting screws, the end part of a spring probe of the top plate pressing and holding piece is matched and located in the filter assembling hole assembly, and the bottom plate is connected with the fixed foot posts through foot post screws.

In order to better realize the utility model discloses, wave filter pilot hole subassembly includes wave filter pilot hole A and wave filter pilot hole B, form the step between wave filter pilot hole A and the wave filter pilot hole B.

Preferably, the supporting and assembling plate is provided with an insulating top lining protruding towards one side of the bottom plate, and the insulating top lining is positioned between the supporting and assembling plate and the bottom plate.

Preferably, the connecting screw is provided with a connecting nut corresponding to the thread, and the top plate pressing and holding piece and the supporting and assembling plate are locked in a one-to-one correspondence manner through the connecting screw and the connecting nut.

Preferably, a socle nut is installed on the socle screw corresponding to the thread, the socle is correspondingly locked and connected to the bottom plate through the socle screw and the socle nut, and a flat washer and a spring washer are sequentially installed between the socle nut and the bottom plate.

Preferably, the top plate is provided with observation waist holes corresponding to the filter mounting holes.

Preferably, the locking screw is sleeved with a flat washer and a spring washer in sequence.

Preferably, the stud screw at the upper end of the bottom plate corresponds to a positive terminal, and the connecting screw at the upper end of the bottom plate corresponds to a negative terminal.

Compared with the prior art, the utility model, have following advantage and beneficial effect:

(1) the utility model discloses a be equipped with wave filter pilot hole subassembly on the bottom plate, the wave filter cooperation of awaiting measuring is installed in wave filter assembly punch hole subassembly, one row of wave filter of awaiting measuring just cooperates the assembly in the wave filter installation row hole of bottom plate, correspond the assembly back at the roof with the support pilot plate, the spring probe that the roof pressed the piece holds the wave filter of awaiting measuring with regard to the top, each wave filter of awaiting measuring of the whole elastic crimping of each spring probe on the roof simultaneously, can let the wave filter of awaiting measuring firmly ground connection assemble on the bottom plate, spring probe also with the earthing pole elastic electrical contact of the wave filter of awaiting measuring simultaneously, the batched high temperature life test of the wave filter of awaiting measuring has been.

(2) The utility model has high assembly efficiency and convenient assembly and disassembly, when in use, tweezers are adopted to pick up products to realize assembly, the bottom plate is overturned to pour all the products on the foam to realize disassembly, and the operation efficiency is high; a single clamp can meet the high-temperature life test of 192 products, and the test efficiency is high.

(3) The utility model has high test reliability, and the bottom plate adopts a waist-shaped through hole structure as a filter mounting row hole, so that the electric insulation performance is good; the bottom plate is provided with a filter assembly hole assembly, and the quincuncial head spring probe and the top plate hole are in interference fit design and are fixed in relative positions; the design of waist type through-hole on the roof can be convenient for observe the product and the probe condition of contact, and the trouble is eliminated.

(4) The utility model discloses the test is thorough, adopts plum blossom head spring probe structure, and the design size is less than about spring probe natural length 1.5mm, can guarantee the probe to the sufficient pressure of shell in the middle of the product, guarantees that all products all have good electrical contact.

Drawings

FIG. 1 is a schematic diagram of a filter structure;

FIG. 2 is a schematic assembled view of the present invention;

fig. 3 is an assembly schematic view of the present invention;

fig. 4 is a schematic structural view of the bottom plate of the present invention;

FIG. 5 is a partial schematic view of a chassis with filters of different sizes mounted thereon;

fig. 6 is a schematic structural view of the top plate.

Wherein, the names corresponding to the reference numbers in the drawings are:

10-ground electrode, 20-end electrode, 1-bottom plate, 2-support assembly plate, 3-leg, 31-leg screw, 32-leg nut, 4-locking screw, 5-top plate, 51-observation waist hole, 6-spring probe, 7-connection screw, 71-connection nut, 72-insulation top liner, 8-filter assembly hole component, 81-filter assembly hole A, 82-filter assembly hole B.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

examples

As shown in fig. 1-5, a special test fixture of wave filter for wave filter high temperature life test, including bottom plate 1, bottom plate 1 is made by conductive metal material, and bottom plate 1 one side is installed a plurality of through locking screw 4 and is supported

assembly plate

2, and 1 opposite side of bottom plate is equipped with a plurality of roof and presses and hold the piece, and the roof is pressed and is held the piece and include roof 5 and install spring probe 6 on roof 5 (the utility model discloses preferably plum blossom head spring probe), is equipped with the wave filter installation and arranges the hole on bottom plate 1, and the hole is arranged in the wave filter installation of bottom plate 1, roof are pressed and are held, support assembly plate 2 one-to-one setting, and a wave filter installation is arranged the hole promptly, a roof is pressed and is held, a support. A plurality of filter mounting row holes are formed in the bottom plate 1, a plurality of filter assembling hole assemblies 8 are arranged in one filter mounting row hole, and one filter to be tested is correspondingly assembled on one filter assembling hole assembly 8. The roof is pressed and is held and support assembly plate 2 and pass through connecting screw 7 and correspond and connect in 1 both sides of bottom plate, the cooperation of 6 tip of spring probe that the roof is pressed and is located wave filter pilot hole subassembly 8, after the wave filter that awaits measuring is installed in the cooperation of the wave filter assembly hole subassembly 8 of bottom plate 1, press and hold the cooperation of piece with the roof and install in 1 side of bottom plate, the wave filter that awaits measuring to 6 tops of spring probe that the roof is pressed and is held holds to wave filter assembly hole subassembly 8, and realize two end electrodes of the wave filter that awaits measuring and the firm electrical contact of bottom plate 1 and be connected, the spring probe 6 that the roof is pressed and is held is connected with. The bottom plate 1 is connected and fixed with the socle 3 through the socle screw 31, preferably, the socle screw 31 of bottom plate 1 upper end corresponds to be anodal terminal (during the use, through the anodal positive pole of anodal terminal connection power), and the connecting screw 7 of bottom plate 1 upper end corresponds to be the negative terminal (during the use, through the negative pole of negative terminal connection power), and bottom plate 1 like this, roof 5 are connected with the power and form the return circuit, just make the filter that awaits measuring installed on bottom plate 1 circular telegram to carry out the high temperature life test.

As shown in fig. 4 and 5, the filter assembly hole assembly 8 includes a filter assembly hole a81 and a filter assembly hole B82, a step is formed between the filter assembly hole a81 and the filter assembly hole B82, the filter assembly hole a81 is adapted to assemble a filter under test of one size, and the filter assembly hole B82 is adapted to assemble a filter under test of another size.

As shown in fig. 3, the supporting and assembling plate 2 is provided with an insulating top lining 72 protruding to one side of the bottom plate 1, the insulating top lining 72 is located between the bottom plate 1 and the top plate 5, and the insulating top lining 72 supports the bottom plate and the top plate 5 for a certain distance to realize electrical insulation between the positive electrode and the negative electrode.

The connecting screw 7 of the present embodiment is correspondingly threaded with a connecting nut 71, and the top plate holding member and the support assembly plate 2 are correspondingly locked one by the connecting screw 7 and the connecting nut 71. The socle screw 31 of this embodiment is provided with a socle nut 32 corresponding to the thread, the socle 3 is correspondingly locked and connected to the bottom plate 1 through the socle screw 31 and the socle nut 32, and a flat washer and a spring washer are sequentially arranged between the socle nut 32 and the bottom plate 1. The locking screw 4 of this embodiment is sequentially and correspondingly sleeved with a flat washer and a spring washer, and the locking screw 4 is tightly fitted and locked by the flat washer and the spring washer.

The utility model discloses it has the observation waist hole 51 corresponding with wave filter installation round to open on preferred roof 5, can conveniently carry out the assembly observation of the wave filter that awaits measuring through observing waist hole 51 to and whether spring probe 6 holds the earthing pole observation of the wave filter that awaits measuring on perpendicular top.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a special test fixture of wave filter for wave filter high temperature life test which characterized in that: the filter assembly device comprises a bottom plate (1), wherein the bottom plate (1) is made of a conductive metal material, one side of the bottom plate (1) is provided with a plurality of supporting assembly plates (2) through locking screws (4), the other side of the bottom plate (1) is provided with a plurality of top plate pressing pieces, each top plate pressing piece comprises a top plate (5) and spring probes (6) arranged on the top plate (5), filter installation holes are formed in the bottom plate (1), the filter installation holes, the top plate pressing pieces and the supporting assembly plates (2) of the bottom plate (1) are in one-to-one correspondence, a plurality of filter assembly hole assemblies (8) are arranged in the filter installation holes of the bottom plate (1), the top plate pressing pieces and the supporting assembly plates (2) are correspondingly connected to the two sides of the bottom plate (1) through connecting screws (7), and the end parts of the spring probes (6) of the top plate pressing pieces are matched and positioned in the filter assembly hole assemblies, the bottom plate (1) is connected with and fixed with the socle (3) through a socle screw (31).

2. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: the filter assembly hole assembly (8) includes a filter assembly hole A (81) and a filter assembly hole B (82), and a step is formed between the filter assembly hole A (81) and the filter assembly hole B (82).

3. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: the support assembly plate (2) is provided with an insulating top lining (72) protruding towards one side of the bottom plate (1), and the insulating top lining (72) is located between the support assembly plate (2) and the bottom plate (1).

4. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: connecting nuts (71) are correspondingly and threadedly mounted on the connecting screws (7), and the top plate pressing and holding pieces and the supporting and assembling plates (2) are locked in a one-to-one correspondence mode through the connecting screws (7) and the connecting nuts (71).

5. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: the utility model discloses a lock connection is in bottom plate (1) with stilt (3) through stilt screw (31), stilt nut (32) are installed to corresponding screw thread on stilt screw (31), correspond lock connection on bottom plate (1) stilt nut (32), install plain washer, spring washer between stilt nut (32) and bottom plate (1) in proper order.

6. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: and the top plate (5) is provided with observation waist holes (51) corresponding to the filter mounting holes.

7. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: the locking screw (4) is sequentially and correspondingly sleeved with a flat washer and a spring washer.

8. A filter-specific test fixture for high-temperature life testing of filters according to claim 1, wherein: the foot post screw (31) of bottom plate (1) upper end corresponds to be anodal terminal post, connecting screw (7) of bottom plate (1) upper end corresponds to be the negative terminal post.