CN216214679U

CN216214679U - Adapter positioning fixture, adapter assembly and filter assembly

Info

Publication number: CN216214679U
Application number: CN202122574419.6U
Authority: CN
Inventors: 唐成
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-04-05
Anticipated expiration: 2031-10-25

Abstract

The application relates to the technical field of communication, provides an adapter positioning fixture, adapter subassembly and wave filter subassembly, and adapter positioning fixture is used for being fixed a position the adapter on the connector of wave filter, and the wave filter has bearing structure, and the connector sets up on bearing structure, and adapter positioning fixture includes: the positioning part is hollow inside, has openings at two opposite ends and is used for the adapter to penetrate through so as to position the adapter; and the limiting part is arranged at one end of the positioning part and is used for limiting and matching with the supporting structure. The application provides an adapter positioning fixture can effectively fix a position and spacing the adapter to take place to rock or deflect when preventing that adapter and connector from being connected, improve the stability that adapter and connector are connected.

Description

Adapter positioning fixture, adapter assembly and filter assembly

Technical Field

The application relates to the technical field of communication, in particular to an adapter positioning clamp, an adapter assembly and a filter assembly.

Background

The filter is used as a frequency selection device, and a connector is required to be arranged on the filter for realizing the connection with external equipment to transmit signals. When the connector is connected with the external device, there is a situation that the adapter (also called adapter) needs to be adopted for switching, and at this time, one end of the adapter is connected with the connector, and the other end of the adapter is connected with the external device.

In the creation process of the technical scheme, the inventor finds that when the adapter is connected to the connector, the adapter may shake or deflect or even fall off, so that signal transmission is affected, and an inner core of the connector and an inner core of the adapter are easily damaged.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide an adapter positioning fixture to solve the technical problem in the related art that when an adapter is connected to a connector, the adapter may shake or even fall off, which easily causes damage to an inner core of the connector and an inner core of the adapter.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: there is provided an adapter positioning jig for positioning the adapter on a connector of a filter, the filter having a support structure on which the connector is disposed, the adapter positioning jig comprising: the positioning part is hollow inside, has openings at two opposite ends and is used for the adapter to penetrate through so as to position the adapter; and the limiting part is arranged at one end of the positioning part and is used for limiting and matching with the supporting structure.

In one embodiment, the interior of the limiting part is hollow and is communicated with the interior of the positioning part; the inner wall shape of the limiting portion is matched with the outer wall shape of the supporting structure, and the limiting portion is used for being sleeved on the supporting structure.

In one embodiment, the inner diameter of the limiting part is larger than that of the positioning part, and a step structure is formed at the joint of the inner wall of the limiting part and the inner wall of the positioning part.

In one embodiment, the limiting part is a cylindrical structure; the inner wall of the limiting part is a circular inner wall.

In one embodiment, the positioning part is a cylindrical structure; the inner wall of the positioning part is a circular inner wall; the positioning part and the limiting part are coaxially arranged.

In one embodiment, a limiting structure is arranged on the limiting part, and a limiting matching structure is arranged on the supporting structure, and the limiting structure is in limiting matching with the limiting matching structure.

In one embodiment, the limiting portion and the positioning portion are of an integrated structure.

It is another object of the present application to provide an adapter assembly, comprising: an adapter; and the adapter positioning jig of any one of the above embodiments, wherein the positioning portion is used for the adapter to be inserted to position the adapter.

It is yet another object of the present application to provide a filter assembly, comprising: a filter having a support structure and a connector disposed on the support structure; an adapter for connecting with the connector; the adapter positioning fixture of any embodiment, wherein the positioning portion is used for the adapter to penetrate through to position the adapter, and the limiting portion is used for limiting and matching with the supporting structure.

In one embodiment, the filter comprises: a cavity; the cover plate is arranged on the opening of the cavity in a covering mode; the supporting structure is convexly arranged on the cavity or the cover plate; the connector is arranged in the supporting structure in a penetrating mode, a flange is arranged at one end, deviating from the cavity, of the connector, and the flange abuts against one end, deviating from the cavity, of the supporting structure.

One or more technical solutions described above in the embodiments of the present application have at least the following technical effects or advantages:

the adapter positioning fixture provided by the embodiment of the application is used for positioning an adapter on a connector of a filter, the filter is provided with a supporting structure, the connector is arranged on the supporting structure, and the adapter is used for being connected with the connector; through setting up the spacing portion that adapter positioning fixture includes location portion and locates location portion one end, the inside cavity and the relative both ends opening of location portion, can supply the adapter to wear to locate the inside of location portion from the opening, in order to realize the location to the adapter, prevent that the adapter from rocking or deflecting for location portion, spacing portion can be with the spacing cooperation of bearing structure limit mutually simultaneously, in order to do benefit to and be connected with bearing structure and restrict spacing portion and take place to remove, and then can restrict adapter positioning fixture wholly and take place to remove for bearing structure, thereby can effectively fix a position and spacing the adapter, take place to rock or deflect when preventing that the adapter is connected with the connector, improve the stability that adapter and connector are connected.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a fixture, an adapter and a filter in accordance with the inventor's experiments;

FIG. 2 is an exploded view of the mating of the fixture and the connector tested by the inventor;

fig. 3 is a schematic structural diagram of an adapter positioning fixture according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

fig. 5 is a schematic structural diagram of another view angle of an adapter positioning fixture according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an adapter assembly according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a filter assembly according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a filter assembly provided in an embodiment of the present application when assembled.

Fig. 9 is a schematic sectional view in the direction B-B in fig. 8.

Wherein, in the figures, the respective reference numerals:

01. fixing the clamp;

10. an adapter positioning jig; 11. a positioning part; 12. a limiting part; 101. a step structure;

100. an adapter assembly; 20. an adapter;

1000. a filter component; 200. a filter; 201. a support structure; 202. a connector; 210. a cavity; 220. a cover plate; 2021. a flange.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The filter is used as a frequency selection device, and a connector is required to be arranged on the filter for realizing the connection with external equipment to transmit signals. When the connector is connected with the external equipment, a situation that the adapter (also called adapter) needs to be adopted for switching exists, at the moment, one end of the adapter is connected with the connector, and the other end of the adapter is connected with the external equipment so as to transmit signals between the filter and the external equipment. For example, when debugging or testing a filter, the adapter is used for switching.

To solve the above problems, the inventors have tried a solution: the adapter 20 is positioned using a sleeve-like holding jig 01. Specifically, referring to fig. 1 and 2, after the adapter 20 is connected to the connector 202, the fixing clamp 01 is sleeved on the adapter 20 and then on the flange 2021 of the connector 202, so as to position the adapter 20 by the fixing clamp 01 and prevent the adapter 20 from shaking or deflecting. However, the inventor found that in the above solution, the thickness of the flange 2021 of the connector 202 is small (especially for a connector with a small size), the width of the flange 2021 of the connector 202 is unstable, and the tolerance of the outer circumference of the flange 2021 of the connector 202 matching with the inner wall of the fixing clamp 01 is not easy to control, so that the fixing clamp 01 and the connector 202 are not firmly fixed, the fixing clamp 01 is easy to fall off or is difficult to be sleeved on the connector 202, and the inner core of the connector 202 and the inner core of the adapter 20 are easily damaged; moreover, since the fixing clamp 01 is sleeved on the flange 2021 of the connector 202, the flange 2021 of the connector 202 is usually of an outer hexagonal structure, so that an inner hexagonal structure needs to be correspondingly processed on the inner wall of the connector 202 to match with the inner hexagonal structure, which results in higher processing cost of the fixing clamp 01.

Therefore, in order to solve the technical problem that the inner core of the connector and the inner core of the adapter are easily damaged due to shaking or even falling off when the adapter is connected to the connector, so as to improve the stability of connection between the adapter and the connector under the condition of improving the stability of the fixing clamp, the inventor proposes the following scheme.

Referring to fig. 3, 4 and 9, an embodiment of the present application provides an adapter positioning fixture 10 for positioning an adapter on a connector of a filter, where the filter has a supporting structure and the connector is disposed on the supporting structure. The support structure is a structure for supporting the connector, and may be a support structure integrally formed with the cavity or the cover plate of the filter, or a structure formed separately from the cavity or the cover plate of the filter and assembled to the cavity or the cover plate of the filter. Fig. 7 to 9 show the adapter 20, the filter 200, the connector 202 and the support structure 201 as an example. Adapter positioning fixture 10 includes location portion 11 and spacing portion 12, wherein:

the positioning portion 11 is hollow and has two open ends, and is used for the adapter 20 to pass through to position the adapter 20. The adapter 20 may be inserted into the positioning portion 11 through the opening of the positioning portion 11, and one end of the adapter 20 for connecting with an external device may extend to the outside of the positioning portion 11 through the opening of the positioning portion 11. Alternatively, the outer wall of the adapter 20 and the inner wall of the positioning portion 11 may be in transition fit or clearance fit, which is not only beneficial to positioning the adapter 20, but also beneficial to the adapter 20 and the positioning portion 11 being matched, when the operation (such as debugging, testing, etc., but not limited thereto) is completed and the adapter positioning jig 10 is no longer needed, the adapter 20 can be detached from the adapter positioning jig 10.

The limiting portion 12 is disposed at one end of the positioning portion 11 and is used for limiting and matching with the supporting structure 201. The limiting fit means that the limiting portion 12 can be connected to the supporting structure 201 so that the positions of the limiting portion 12 and the supporting structure 201 are relatively stable. It should be understood that the relative stable position of the position-limiting portion 12 and the supporting structure 201 means that the position-limiting portion 12 is difficult to shake relative to the supporting structure 201, but the two can be disassembled to facilitate the disassembly and assembly of the adapter positioning fixture 10. For example, the position-limiting portion 12 and the supporting structure 201 can be fit with each other (e.g., transition fit, clearance fit), snap fit, plug fit, threaded connection, etc., but are not limited thereto.

The adaptor positioning jig 10 provided by the embodiment of the application is used for positioning the adaptor 20 on the connector 202 of the filter 200, the filter 200 has a supporting structure 201, the connector 202 is arranged on the supporting structure 201, and the adaptor 20 is used for being connected with the connector 202; by arranging the adapter positioning clamp 10 to comprise the positioning part 11 and the limiting part 12 arranged at one end of the positioning part 11, the positioning part 11 is hollow and has openings at two opposite ends, the adapter 20 can penetrate through the positioning part 11 from the openings to realize the positioning of the adapter 20, the adapter 20 is prevented from shaking or deflecting relative to the positioning part 11, meanwhile, the limiting part 12 can be in limiting fit with the supporting structure 201, the supporting structure 201 is fixed on the filter 200, so that the limiting part 12 can be connected with the supporting structure 201 to limit the movement of the limiting part 12, that is, the positioning part 11 connected with the limiting part 12 can be limited, and the adapter positioning clamp 10 can be limited from moving integrally relative to the supporting structure 201, thereby effectively positioning and limiting the adapter 20 through the adapter positioning clamp 10, and preventing the adapter 20 from shaking or deflecting when being connected with the connector 202, the stability of the connection of the adapter 20 with the connector 202 is improved.

Moreover, compared with the scheme that the fixing clamp is sleeved on the flange of the connector 202, the limiting part 12 which is in limiting fit with the supporting structure 201 is arranged, so that the thickness and the width of the flange of the connector 202 are not limited, the contact area between the adapter positioning clamp 10 and other parts is increased, the assembly stability of the adapter positioning clamp 10 can be effectively improved, an inner hexagonal structure matched with the flange of the outer hexagonal structure of the connector 202 is not required, the processing is simpler, and the manufacturing cost can be reduced.

In one embodiment, referring to fig. 5 and 9, the limiting portion 12 is hollow and is communicated with the positioning portion 11. The inner wall shape of the limiting part 12 is matched with the outer wall shape of the supporting structure 201, and the limiting part 12 is used for being sleeved on the supporting structure 201.

So set up, through setting up spacing portion 12 for inside cavity and the structure that is linked together with location portion 11, spacing portion 12 can overlap and locate support structure 201 and with the cooperation of support structure 201 looks limit for spacing portion 12 is simple structure easily processing not only, and can improve with support structure 201 area of contact and cooperate with support structure 201 steadily, takes place to rock or deflect for support structure 201 with spacing portion 12 restriction.

Optionally, the position-limiting portion 12 and the supporting structure 201 may be in transition fit or clearance fit, so that the position-limiting portion 12 can be detached from the supporting structure 201 when the adapter 20 is not needed after the position-limiting portion 12 is sleeved on the supporting structure 201.

Optionally, in an embodiment, referring to fig. 4, 5 and 9, an inner diameter of the position-limiting portion 12 is larger than an inner diameter of the positioning portion 11, and a step structure 101 is formed at a connection portion between an inner wall of the position-limiting portion 12 and an inner wall of the positioning portion 11, that is, a step is formed between the inner wall of the position-limiting portion 12 and the inner wall of the positioning portion 11.

With such an arrangement, since the inner diameter of the limiting portion 12 is larger than the inner diameter of the positioning portion 11, the adapter 20 can be stably matched with the inner wall of the positioning portion 11 under the condition that the limiting portion 12 is stably sleeved on the supporting structure 201; moreover, the step structure 101 can be formed at the connection position between the inner wall of the limiting portion 12 and the inner wall of the positioning portion 11, and when the supporting structure 201 is sleeved with the limiting portion 12, the step structure 101 can be abutted against the end of the connector 202 or the end of the supporting structure 201, so that the sleeving depth between the limiting portion 12 and the supporting structure 201 is limited, and the stability of the adapter positioning clamp 10 matched with the supporting structure 201 is further improved.

In other embodiments, the inner diameter of the stopper portion 12 may be smaller than or equal to the inner diameter of the positioning portion 11.

Alternatively, in an embodiment, referring to fig. 3, 4 and 9, the position-limiting portion 12 is a cylindrical structure, i.e. a sleeve shape, which may be a cylindrical structure. The inner wall of the limiting part 12 is a circular inner wall. The outer wall of the support structure 201 of the filter 200 is generally circular, and the position-limiting portion 12 is adapted to the support structure 201.

Due to the arrangement, the limiting part 12 is of a cylindrical structure, and the inner wall of the limiting part 12 is a circular inner wall, so that the processing and forming are facilitated, and the manufacturing cost is reduced; moreover, the supporting structure 201 of the filter is generally a truncated cone-shaped structure, which is beneficial to matching the limiting part 12 with the supporting structure of the existing filter, and the adaptability is wider, and the limiting part 12 and the supporting structure 201 can form a hole to be matched with a shaft, thus being beneficial to improving the matching stability.

The shape of the stopper portion 12 is not limited to this. Alternatively, in some other embodiments, the inner wall of the position-limiting portion 12 may have other shapes than circular, such as, but not limited to, oval, polygonal, etc.; correspondingly, the outer wall of the supporting structure 201 is also shaped to match the inner wall of the position-limiting portion 12, so as to facilitate the engagement between the two. Alternatively, in some other embodiments, the position-limiting part 12 may have a non-cylindrical structure, such as a square cylinder or other shapes.

Alternatively, in an embodiment, referring to fig. 3, 4 and 9, the positioning portion 11 is a cylindrical structure, i.e. a sleeve shape, which may be a cylindrical structure. The inner wall of the positioning portion 11 is a circular inner wall and can be matched with the outer wall of the adapter 20 (for example, transition fit and clearance fit). The positioning portion 11 and the limiting portion 12 may be coaxially arranged, that is, the axis of the positioning portion 11 coincides with the axis of the limiting portion 12.

Due to the arrangement, the positioning part 11 is of a cylindrical structure, and the inner wall of the positioning part 11 is a circular inner wall, so that the processing and forming are facilitated, and the manufacturing cost is reduced; moreover, since the outer wall of the adapter 20 is generally a circular outer wall, the positioning portion 11 and the adapter 20 can be easily matched, and the adapter is more adaptable and can be easily positioned stably by the adapter 20.

The shape of the positioning portion 11 is not limited to this. Alternatively, in some other embodiments, the inner wall of the positioning portion 11 may have other shapes than a circle, such as an ellipse, a waist circle, a polygon, but is not limited thereto; correspondingly, the outer wall of the adapter 20 is also shaped to match the inner wall of the position-limiting portion 12, so as to facilitate the engagement between the two. Alternatively, in some other embodiments, the positioning portion 11 may also be a non-cylindrical structure, for example, a square cylinder or other shape.

The spacing cooperation mode between the spacing portion 12 and the supporting structure 201 is not limited to the matching of the sleeving, in another embodiment, a spacing structure is arranged on the spacing portion 12, a spacing cooperation structure is arranged on the supporting structure 201, and the spacing structure and the spacing cooperation structure are in spacing cooperation. The limiting structure can be a clamping structure, the limiting matching structure can be a clamping matching structure, the limiting structure and the clamping matching structure can be clamped mutually, for example, the clamping structure can be a convex structure, the clamping matching structure can be a groove structure, or the clamping structure and the clamping matching structure are opposite, the clamping structure is a groove structure, and the clamping matching structure is a convex structure; the limiting structure can be an inserting structure, and the limiting matching structure can be an inserting matching structure which can be inserted; the limiting structure can be an external thread structure, the limiting matching structure can be an internal thread structure, and the two structures can be in threaded connection; but is not limited thereto. In this case, the stopper portion 12 may be a cylindrical structure or a non-cylindrical structure, such as a lug structure, a boss structure, or the like, but is not limited thereto.

So set up, because be equipped with limit structure on spacing portion 12, be equipped with spacing cooperation structure on the bearing structure 201, limit structure and spacing cooperation structure spacing mutually, can make spacing portion 12 and bearing structure 201 spacing cooperation mutually equally, accessible adapter positioning fixture 10 effectively fixes a position and spacing to adapter 20 to take place to rock or deflect when preventing that adapter 20 is connected with connector 202, improve the stability that adapter 20 is connected with connector 202.

In one embodiment, referring to fig. 4 and 5, the position-limiting portion 12 and the positioning portion 11 are an integral structure, that is, the position-limiting portion 12 and the positioning portion 11 are integrally formed.

Due to the arrangement, the limiting part 12 and the positioning part 11 are of an integrated structure, so that machining forming or casting forming on the same part is facilitated; the structural strength of the adapter positioning fixture 10 can be improved, and the positioning and limiting effects on the adapter 20 can be further improved; and the processing cost is lower.

In other embodiments, the stopper portion 12 and the positioning portion 11 may be formed separately and connected to each other.

Referring to fig. 6 and 9, an adapter assembly 100 is further provided in an embodiment of the present application, where the adapter assembly 100 includes an adapter 20 and the adapter positioning fixture 10 of any of the embodiments, and the positioning portion 11 is used for the adapter 20 to pass through to position the adapter 20. The adapter 20, also called an adapter, generally includes an outer conductor, an inner core penetrating the outer conductor, and an insulator disposed between the outer conductor and the inner core, and the adapter 20 may be any one of the existing adapters or an adapter obtained by modifying the existing adapter.

Since the adapter assembly 100 provided in the embodiment of the present application employs the adapter positioning fixture 10 of the above embodiment, the adapter assembly also has the technical effects brought by the technical solutions of the adapter positioning fixture 10 of any of the above embodiments, and details are not repeated herein.

Illustratively, the adapter assembly 100 provided by the embodiment of the present application may be used when the connector of the filter needs to be connected to an external device and an adapter needs to be used. Specifically, when the adapter assembly 100 is mated with the filter, the inner core of the adapter 20 may be connected with the inner core of the connector of the filter, and then the adapter positioning fixture 10 is sleeved on the adapter 20, so that the position-limiting portion 12 is in position-limiting fit with the support structure of the filter. Or, the limiting part 12 of the adapter positioning fixture 10 may be first matched with the support structure of the filter in a limiting manner, and then the adapter 20 is inserted through the opening of the positioning part 11, so that the inner core of the adapter 20 is connected with the inner core of the connector of the filter.

Referring to fig. 7 to 9, a filter assembly 1000 is further provided in an embodiment of the present application, the filter assembly 1000 includes a filter 200, an adaptor 20, and the adaptor positioning jig 10 of any of the embodiments. The filter 200 has a support structure 201 and a connector 202 provided on the support structure 201, the support structure 201 is used for supporting the connector 202 and allowing the connector 202 to be mounted; the adapter 20 is used for connecting with the connector 202; the positioning portion 11 is used for the adapter 20 to pass through to position the adapter 20, and the limiting portion 12 is used for limiting and matching with the supporting structure 201.

Since the filter assembly 1000 provided in the embodiment of the present application employs the adapter positioning fixture 10 of the foregoing embodiment, the filter assembly also has the technical effects brought by the technical solutions of the adapter positioning fixture 10 of any one of the foregoing embodiments, and details are not described herein again.

It is understood that the connector 202 is a carrier for transmitting signals of the filter 200 to an external device or transmitting signals of an external device to the filter 200. The connector 202 may be various types of connectors for being disposed on the filter, such as a BMA connector (blind mate connector), an SMA connector, an SMP connector, an MBX connector, a PSMP connector, a TX connector, and the like, but is not limited thereto.

In one embodiment, referring to fig. 9, the filter 200 includes a cavity 210 and a cover plate 220, wherein the cover plate 220 covers an opening of the cavity 210. The supporting structure 201 is protruded on the cavity 210 or the cover plate 220, and the supporting structure 201 is protruded outside the filter 200, so that the limiting part 12 and the supporting structure 201 are in limited fit. The connector 202 is inserted into the supporting structure 201, a flange 2021 is disposed at an end of the connector 202 facing away from the cavity 210, and the flange 2021 abuts against an end of the supporting structure 201 facing away from the cavity 210. The supporting structure 201 may be a convex pillar structure or a convex boss structure, may be an integrated structure with the cavity 210 or the cover plate 220, or may be assembled on the cavity 210 or the cover plate 220 by being formed separately.

It is understood that the filter 200 includes other elements besides the cavity 210, the cover 220, the support structure 201, the connector 202, and other elements, and the other elements may be elements of the existing filter, which are not described in detail for brevity.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. An adapter positioning fixture for positioning an adapter on a connector of a filter, the filter having a support structure on which the connector is disposed, the adapter positioning fixture comprising:

the positioning part is hollow inside, has openings at two opposite ends and is used for the adapter to penetrate through so as to position the adapter; and

and the limiting part is arranged at one end of the positioning part and is used for limiting and matching with the supporting structure.

2. The adaptor positioning jig of claim 1, wherein: the interior of the limiting part is hollow and is communicated with the interior of the positioning part; the inner wall shape of the limiting portion is matched with the outer wall shape of the supporting structure, and the limiting portion is used for being sleeved on the supporting structure.

3. The adaptor positioning jig of claim 2, wherein: the inner diameter of the limiting part is larger than that of the positioning part, and a step structure is formed at the joint of the inner wall of the limiting part and the inner wall of the positioning part.

4. The adaptor positioning jig of claim 2 or 3, wherein: the limiting part is of a cylindrical structure; the inner wall of the limiting part is a circular inner wall.

5. The adaptor positioning jig of claim 4, wherein: the positioning part is of a cylindrical structure; the inner wall of the positioning part is a circular inner wall; the positioning part and the limiting part are coaxially arranged.

6. The adaptor positioning jig of claim 1, wherein: the limiting part is provided with a limiting structure, the supporting structure is provided with a limiting matching structure, and the limiting structure is in limiting matching with the limiting matching structure.

7. The adapter positioning jig of claim 1, 2, 3 or 6, wherein: the limiting part and the positioning part are of an integrated structure.

8. An adapter assembly, comprising:

an adapter; and

the adapter positioning jig according to any one of claims 1 to 7, the positioning portion being for the adapter to be pierced therethrough to position the adapter.

9. A filter assembly, the filter assembly comprising:

a filter having a support structure and a connector disposed on the support structure;

an adapter for connecting with the connector; and

the adapter positioning fixture according to any one of claims 1 to 7, wherein the positioning portion is used for the adapter to be inserted to position the adapter, and the limiting portion is used for limiting and matching with the support structure.

10. The filter assembly of claim 9, wherein the filter comprises:

a cavity; and

the cover plate is arranged at the opening of the cavity in a covering manner;

the supporting structure is convexly arranged on the cavity or the cover plate; the connector is arranged in the supporting structure in a penetrating mode, a flange is arranged at one end, deviating from the cavity, of the connector, and the flange abuts against one end, deviating from the cavity, of the supporting structure.