CN221054099U - Pressure maintaining jig - Google Patents

Abstract

The utility model relates to the technical field of earphone production, in particular to a pressure maintaining jig, which comprises a pressure maintaining sleeve, wherein the pressure maintaining sleeve comprises a mounting base and a pressure maintaining piece; the pressure maintaining piece is arranged on the mounting base, and one end, far away from the mounting base, of the pressure maintaining piece is provided with a pressure maintaining inclined plane matched with the surface of the charging copper column. In the utility model, the pressure maintaining inclined plane is arranged at the bottom of the pressure maintaining piece, so that the stress area of the pressure maintaining piece and the surface of the charging copper column is increased, and the processing yield is improved.

Description

Pressure maintaining jig

Technical Field

The utility model relates to the technical field of earphone production, in particular to a pressure maintaining jig.

Background

The wireless earphone is generally internally provided with a battery, and the charging copper column is abutted against a charging component in the earphone charging box to complete the charging of the wireless earphone.

In the related art, in order to install and fix the charging copper pillar at a corresponding position in the earphone, a jig with a telescopic probe type structure is generally adopted, and a probe with a compression spring is pressed down to realize the relative fixing of the charging copper pillar of the earphone at the inner position of the earphone, and then the fixing of the charging copper pillar in the earphone is completed through relevant processes such as dispensing, welding and the like.

But the installation face that the inside mounted position of earphone was located is an inclined plane, and the vertical copper post that charges can form an contained angle about 30 with the installation face, and the contained angle is the little the position installation degree of difficulty more greatly, and the probe that has compression spring simultaneously is metal material, and the surface is slick and sly, and the surface of probe is the cambered surface, and the contact surface is limited, so can skid when pushing down the copper post, leads to bulldozing the direction change to the copper post, and makes the copper post unable along the axial of mounting groove position packing into, appears the mounted position skew, and in the earphone copper post that charges down presses the contact, can take place the structure dislocation condition, lead to the copper post that charges of earphone to take place the slope easily, and the processing defective rate is higher.

Disclosure of utility model

The utility model mainly aims to provide a pressure maintaining jig which aims to increase the contact area with a charged copper column by utilizing the pressure maintaining inclined plane of a pressure maintaining part and improve the processing yield.

In order to achieve the above purpose, the pressure maintaining jig provided by the utility model comprises a pressure maintaining sleeve, wherein the pressure maintaining sleeve comprises a mounting base and a pressure maintaining piece; the pressure maintaining piece is arranged on the mounting base, and one end, far away from the mounting base, of the pressure maintaining piece is provided with a pressure maintaining inclined plane matched with the surface of the charging copper column.

In an embodiment of the utility model, at least two protruding parts are formed at one end of the pressure maintaining piece far away from the mounting base, a clearance groove is formed by encircling the protruding parts, and at least two protruding parts are arranged on one side of the pressure maintaining piece facing away from the pressure maintaining piece in a common inclined plane to form the pressure maintaining inclined plane.

In an embodiment of the utility model, the pressure maintaining member is provided with an avoidance slope, and the avoidance slope is close to the avoidance groove.

In one embodiment of the present utility model, the mounting base includes a first base and a second base;

The first base is stacked on the second base, a limit groove is formed in one side, facing towards the second base, of the first base, a limit space is formed by enclosing the first base and the second base, a pressure maintaining clamping groove is formed in one side, facing away from the first base, of the second base, the pressure maintaining clamping groove is communicated with the limit groove and the outside, and the pressure maintaining piece is inserted into the pressure maintaining clamping groove.

In an embodiment of the present utility model, the second base is provided with a limiting block, and the limiting block is located at an end of the pressure maintaining slot away from the first base, so that a size of an end of the pressure maintaining slot close to the first base is larger than a size of an end of the pressure maintaining slot away from the first base in an embodiment of the present utility model; the pressure maintaining piece comprises a limiting section and a pressure maintaining section, the size of the pressure maintaining section is smaller than that of the limiting section, and the limiting section is located in the pressure maintaining clamping groove and is abutted to the limiting block.

In an embodiment of the utility model, the second base is provided with a plurality of groups of pressure maintaining clamping grooves, and each group of pressure maintaining clamping grooves comprises two sub pressure maintaining clamping grooves.

In an embodiment of the utility model, the pressure maintaining fixture comprises a pressure maintaining base, wherein the pressure maintaining base is provided with a circulation tool, and the circulation tool is provided with an earphone fixing groove;

The communication tool is arranged on one side of the pressure maintaining base facing the pressure maintaining sleeve, the earphone fixing groove is arranged at the orthographic projection position of the communication tool corresponding to the pressure maintaining piece, and the wireless earphone is arranged in the earphone fixing groove;

The pressure maintaining external member is detachably connected with the pressure maintaining base.

In an embodiment of the utility model, the pressure maintaining fixture includes a height adjusting component;

The two ends of the height adjusting component are respectively connected with the pressure maintaining base and the pressure maintaining sleeve, and the height adjusting component is used for adjusting the interval between the pressure maintaining base and the pressure maintaining sleeve.

In an embodiment of the utility model, the pressure maintaining kit further includes a flexible pad, the flexible pad is disposed in the limiting space, and an end of the pressure maintaining member facing away from the pressure maintaining inclined plane is connected with the flexible pad.

In one embodiment of the utility model, the flexible pad is provided as a flexible silicone pad.

According to the technical scheme, the pressure maintaining kit of the pressure maintaining jig comprises the mounting base and the pressure maintaining piece, one end of the pressure maintaining piece is connected with the mounting base, the other end of the pressure maintaining piece is provided with the pressure maintaining inclined surface, the pressure maintaining inclined surface is matched with the surface of the charging copper column, when pressure maintaining is carried out, the pressure maintaining inclined surface increases the stress area of the pressure maintaining piece and the surface of the charging copper column, the stress is more uniform, the stability of the whole jig system is improved, and therefore the production yield is improved, and is improved to 99.8% under the condition of manual action.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an embodiment of a pressure maintaining fixture according to the present utility model;

FIG. 2 is a schematic perspective view of another embodiment of a pressure maintaining fixture according to the present utility model;

FIG. 3 is a schematic perspective view of a pressure maintaining member according to an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of the pressure retention member of FIG. 3 from another perspective;

FIG. 5 is a schematic perspective view of an embodiment of a pressure maintaining base according to the present utility model;

fig. 6 is a schematic perspective view of a first base according to an embodiment of the utility model.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				999	Pressure maintaining jig	140	Pressure maintaining inclined plane
10	Pressure maintaining suite	141	Protruding part
				11	Flexible pad	14a	Position avoiding groove
12	First base	142	Avoidance ramp
				12a	Limiting groove	20	Pressure maintaining base
13	Second base	21	Circulation tool
				13a	Pressure maintaining clamping groove	21a	Earphone fixing groove
131	Limiting block	30	Height adjusting assembly
				14	Pressure-retaining piece

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

As shown in fig. 1 to 4, a pressure maintaining jig 999 according to the present utility model includes a pressure maintaining set 10, wherein the pressure maintaining set 10 includes a mounting base and a pressure maintaining member 14; the pressure maintaining piece 14 is arranged on the mounting base, and a pressure maintaining inclined plane 140 matched with the surface of the charging copper column is formed at one end of the pressure maintaining piece 14 away from the mounting base.

The pressure maintaining kit 10 of the pressure maintaining jig 999 comprises a mounting base and a pressure maintaining piece 14, one end of the pressure maintaining piece 14 is connected with the mounting base, the other end of the pressure maintaining piece 14 is provided with a pressure maintaining inclined surface 140, the pressure maintaining inclined surface 140 is matched with the surface of the charged copper column, when pressure is maintained, the pressure maintaining inclined surface 140 increases the stress area of the pressure maintaining piece 14 and the surface of the charged copper column, the stress is more uniform, the contact stability is improved, and the processing yield is improved.

The whole mounting base presents flat strip, and the one end of pressure retention piece 14 is planar design, and the other end is equipped with pressurize inclined plane 140, and specific design can be made according to the inclination of the earphone charging copper post of needs pressurize to pressurize on the pressurize inclined plane 140, and the area of force when the pressurize is increased through the mode of face-to-face contact, improves system stability. It will be appreciated that the pressure maintaining element 14 and the base may be directly contacted and fixed, or may be indirectly contacted by being sandwiched between them by a cushion, and the specific connection method and the beneficial effects thereof are explained in detail below without limitation.

In an embodiment of the present utility model, as shown in fig. 3 and 4, at least two protruding portions 141 are formed at an end of the pressure maintaining member 14 away from the mounting base, the protruding portions 141 are surrounded by a clearance groove 14a, and at least two sides of the protruding portions 141 facing away from the pressure maintaining member 14 are inclined together to form the pressure maintaining inclined surface 140.

In this embodiment, two protruding portions 141 are provided on the pressure maintaining member 14, and the protruding portions 141 are enclosed to form a space avoiding groove 14a, when the earphone charging copper pillar is pressure-maintaining, the space avoiding groove 14a can accommodate the charging copper pillar, and a bump is arranged on the top of the charging copper pillar, so that the pressure maintaining member 14 can only contact the bump during pressure maintaining; because the two protruding parts 141 are arranged on one side of the pressure maintaining piece 14 facing away from the pressure maintaining inclined plane 140 formed by sharing the inclined plane with the same included angle with the horizontal plane, even if the contact area between the two protruding parts 141 and the charging copper column is reduced, because the pressure maintaining piece 14 is provided with at least two protruding parts 141 which are arranged oppositely, when the pressure maintaining is carried out, the pressure maintaining piece 14 and the charging copper column can form two stress surfaces with opposite positions, according to stress analysis, the surface of the charging copper column contacted with the protruding parts 141 can keep stable balance due to the acting force distributed on the two sides along the center, the angle inclination can not occur during the pressure maintaining, the copper column cannot be installed along the axial direction of the installation groove, and the installation position is deviated, so that the stress stability of the charging copper column during the pressure maintaining is effectively improved, and the probability of inclination of the charging copper column is reduced. It is understood that the number of the protrusions 141 should be adaptively adjusted according to the size and geometry of the specific charged copper pillar for pressure maintaining, so as to eliminate the tilting problem caused by human error during pressure maintaining.

In an embodiment of the present utility model, as shown in fig. 3, the pressure maintaining member 14 is provided with an avoidance slope 142, and the avoidance slope 142 is close to the avoidance groove 14a.

In this embodiment, when the pressure maintaining of the pressure maintaining member 14 is considered, the occupied space in the earphone may be increased, which may cause the earphone to be touched by other parts to drive the earphone charging copper pillar to incline, and an avoidance slope 142 is provided near the avoidance slot 14a, where the avoidance slope 142 reduces the contact probability with the earphone when the pressure maintaining member 14 is pressed down. It is to be understood that the avoidance ramp 142 is used for avoiding part of the structure of the earphone, so that the inclination angle and the inclination towards a specific direction are specifically designed according to the actual requirement, and the requirement can be met, and the avoidance ramp is not limited herein.

In an embodiment of the present utility model, as shown in fig. 2 and 6, the mounting base includes a first base 12 and a second base 13; the first base 12 is stacked on the second base 13, a limit groove 12a is formed in one side, facing the second base 13, of the first base 12, a limit space is formed by enclosing the first base 12 and the second base 13, a pressure maintaining clamping groove 13a is formed in one side, facing away from the first base 12, of the second base 13, the pressure maintaining clamping groove 13a is communicated with the limit groove 12a and the outside, and a pressure maintaining piece 14 is inserted into the pressure maintaining clamping groove 13a.

In this embodiment, the first base 12 and the second base 13 are fixed by screwing, the first base 12 is provided with a limiting groove 12a facing the second base 13, when the two are stacked together, the groove wall of the limiting groove 12a is combined with the side wall of the second base 13 facing one side of the first base 12, so that a limiting space can be formed by enclosing, the limiting space is combined with a pressure maintaining clamping groove 13a to provide a pressure maintaining stroke for the pressure maintaining piece 14, further, the pressure maintaining clamping groove 13a is arranged under the second base 13 in the vertical direction in the limiting space, the pressure maintaining clamping groove 13a is communicated with the limiting space and the outside, the pressure maintaining piece 14 is inserted in the pressure maintaining clamping groove 13a, one end of the plane of the pressure maintaining piece 14 can move in the vertical direction in the limiting space, the other end of the pressure maintaining piece 14 can be exposed outside for charging copper columns, the pressure maintaining is limited by the pressure maintaining clamping groove 13a, the pressure maintaining piece 14 is prevented from moving downwards to generate non-vertical direction movement, the inclination probability of the charging copper columns of the earphone is reduced, meanwhile, the first base 12 and the second base 13 are convenient to detach by screwing, the pressure maintaining clamping piece 14 and each base 999 is convenient to replace, and the pressure maintaining device is difficult to detach in a long-term storage mode because of the pressure maintaining device is difficult to replace. It can be understood that the first base 12 and the second base 13 can be detachably connected by a clamping manner, and the connection manner of the two is not limited, so that the requirements can be met.

In an embodiment of the present utility model, as shown in fig. 2 to 4, the second base 13 is provided with a stopper 131, and the stopper 131 is located at an end of the pressure maintaining slot 13a away from the first base 12, so that a size of an end of the pressure maintaining slot 13a near the first base 12 is larger than a size of an end of the pressure maintaining slot 13a away from the first base 12; the pressure retaining member 14 includes a limiting section and a pressure retaining section, the size of the pressure retaining section is smaller than that of the limiting section, and the limiting section is located in the pressure retaining slot 13a and is abutted to the limiting block 131.

In this embodiment, a stopper 131 is disposed at one end of the pressure maintaining slot 13a away from the first base 12, at least part of the stopper 131 covers a notch of one end of the pressure maintaining slot 13a away from the first base 12, so that the size of one end of the pressure maintaining slot 13a close to the first base 12 is larger than the size of one end of the pressure maintaining slot 13a away from the first base 12, and meanwhile, the outer surface of one side of the stopper 131 facing the first base 12 is connected with the slot wall of the pressure maintaining slot 13a to form a limiting step; meanwhile, the pressure maintaining piece 14 adopts the sectional design of the limiting section and the pressure maintaining section, the limiting section is located in the pressure maintaining clamping groove 13a, and because the limiting block 131 covers the notch of one end of the pressure maintaining clamping groove 13a far away from the first base 12, when the pressure maintaining section of the pressure maintaining piece 14 passes through the pressure maintaining clamping groove 13a, the limiting block 131 limits, the limiting section of the pressure maintaining piece 14 cannot pass through the notch with small size, at the moment, the limiting section abuts against the limiting step under the influence of gravity, the pressure maintaining piece 14 is prevented from falling, meanwhile, the limiting step limits the maximum displacement of the pressure maintaining piece 14, and excessive pressure maintaining is prevented so that the earphone charging copper column is inclined.

In an embodiment of the present utility model, as shown in fig. 2, the second base 13 is provided with a plurality of sets of pressure maintaining grooves 13a, and each set of pressure maintaining grooves 13a includes two sub-pressure maintaining grooves 13a.

In this embodiment, the second base 13 is provided with four sets of pressure maintaining clamping grooves 13a, two sub pressure maintaining clamping grooves 13a of each set of pressure maintaining clamping grooves 13a are symmetrically designed, the pressure maintaining member 14 is arranged in the pressure maintaining clamping grooves 13a to form four pressure maintaining groups, each pressure maintaining group acts on a pair of charging copper columns required in an earphone, and the multiple sets of design can effectively improve the working efficiency. It is understood that the number of the holding pressure card grooves 13a is not particularly limited, and the actual use is satisfied.

In an embodiment of the present utility model, as shown in fig. 1 and 5, the pressure maintaining jig 999 includes a pressure maintaining base 20, the pressure maintaining base 20 is provided with a circulation tool 21, the circulation tool 21 is provided with an earphone fixing groove 21a, and a wireless earphone is placed in the earphone fixing groove 21 a; the circulation tool 21 is arranged on one side of the pressure maintaining base 20 facing the pressure maintaining sleeve 10, and the earphone fixing groove 21a is arranged at the orthographic projection position of the circulation tool 21 corresponding to the pressure maintaining piece 14; the circulation tool 21 is detachably connected with the pressure maintaining base 20.

In this embodiment, the pressure maintaining jig 999 is further provided with a pressure maintaining base 20, the pressure maintaining base 20 bears a placing and circulating tool 21, the pressure maintaining piece 14 orthographic projects on the circulating tool 21 and is provided with a plurality of earphone fixing grooves 21a, the earphone fixing grooves 21a are used for placing wireless earphones, and when the pressure maintaining sleeve 10 is pressed down, the pressure maintaining piece 14 abuts against an earphone charging copper column. Meanwhile, the automatic carrying can be realized by using a transmission belt or a mechanical arm and other modes to convey the earphone with good pressure maintaining to the next assembly process, the flow is simple, the operation is convenient, and the working efficiency can be effectively improved. It should be understood that the circulation tool 21 may be connected to the pressure maintaining base 20 by pin punching, or may be detachably connected by hinging, etc., which is not limited herein.

In one embodiment of the present utility model, as shown in FIG. 1, the pressure maintaining jig 999 includes a height adjusting assembly 30; the two ends of the height adjusting component 30 are respectively connected with the pressure maintaining base 20 and the pressure maintaining sleeve 10, and the height adjusting component 30 is used for adjusting the interval between the pressure maintaining base 20 and the pressure maintaining sleeve 10.

In this embodiment, two ends of the height adjusting component 30 are respectively connected with the pressure maintaining base 20 and the pressure maintaining sleeve 10 through a buckle, the height adjusting component 30 comprises a screw device and a fixing device, the screw device comprises a screw rod, a nut and other structures, a straight thread or a screw thread can be arranged outside the screw rod for the nut to move, and when the screw rod rotates, the nut moves up and down along the screw rod, so that the height adjustment is realized; similarly, the fixing device can adopt a locking bolt, and when the nut moves to a required height, the fixing device is tightly fixed with the locking bolt so as to prevent unexpected change of the height. The distance between the pressure maintaining base 20 and the pressure maintaining sleeve 10 is adjusted through the height adjusting assembly 30, so that the pressure maintaining distance can be controlled, and the pressure maintaining of the earphone charging copper column is facilitated. In another embodiment, two ends of the height adjusting assembly 30 are respectively connected with the pressure maintaining base 20 and the pressure maintaining sleeve 10 through buckles, the height adjusting assembly 30 comprises a spring and an adjusting screw, and the compression degree of the spring can be changed by adjusting the tightness degree of the screw, so that the distance between the pressure maintaining base 20 and the pressure maintaining sleeve 10 is adjusted.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the pressure maintaining kit 10 further includes a flexible pad 11, the flexible pad 11 is disposed in the limiting space, and an end of the pressure maintaining piece 14 facing away from the pressure maintaining inclined plane 140 is connected to the flexible pad 11.

In this embodiment, by arranging a flexible pad 11 between the mounting base and the pressure maintaining member 14, the flexible pad 11 is used as a buffer structure, so that rigid contact between the pressure maintaining member 14 and the mounting base is avoided, deformation of the pressure maintaining member 14 is avoided, the distance between the pressure maintaining member 14 and the pressure maintaining member 14 when the pressure maintaining member 14 is pressed down is reduced by the flexible pad 11, inclination between the flexible pad 11 and the pressure maintaining member 14 is avoided, and the direction of force is prevented from being changed, so that inclination of the earphone charging copper column at the lower end is caused; meanwhile, the flexible pad 11 can increase the stress area between the flexible pad and the pressure maintaining piece 14, and the stability of the whole system is improved. It can be understood that the flexible pad 11 may be fixed to the mounting base by dispensing or other fixing methods, which is not limited herein, and in the same way, the contact manner between the pressure maintaining element 14 and the flexible pad 11 is various, and the flexible pad may be directly adhered to the surface of the flexible pad 11, or a clamping groove matching with the flexible element and the pressure maintaining element 14 may be formed in the mounting base, and the flexible pad 11 and the pressure maintaining element 14 may be fixed in the clamping groove, which is not limited herein, so as to meet the requirement.

In one embodiment of the utility model, the flexible pad 11 is provided as a flexible silicone pad.

In the embodiment, the flexible pad 11 is a flexible silica gel pad made of silica gel, the thickness of the flexible silica gel pad is 2mm, and the step difference between the charged copper column and the shell material after pressure maintaining can be reduced to be smaller than 0.02mm; meanwhile, the flexible silica gel pad has excellent elasticity, and can quickly recover after being stressed, so that the flexible silica gel pad can provide better buffering and damping effects, reduce the impact and vibration transmission to objects and improve the system stability during pressure maintaining.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (10)

1. A pressure maintaining jig (999) for a charging copper column of a pressure maintaining wireless earphone, which is characterized in that the pressure maintaining jig (999) comprises a pressure maintaining sleeve (10), and the pressure maintaining sleeve (10) comprises a mounting base and a pressure maintaining piece (14);

The pressure maintaining piece (14) is arranged on the mounting base, and a pressure maintaining inclined plane (140) matched with the surface of the charging copper column is formed at one end, far away from the mounting base, of the pressure maintaining piece (14).

2. The pressure maintaining jig (999) according to claim 1, wherein at least two protruding portions (141) are formed at one end of the pressure maintaining member (14) away from the mounting base, a clearance groove (14 a) is formed around the protruding portions (141), and at least two protruding portions (141) are disposed on a common inclined surface on a side facing away from the pressure maintaining member (14) to form the pressure maintaining inclined surface (140).

3. The dwell fixture (999) as claimed in claim 2, characterized in that the dwell member (14) is provided with an avoidance ramp (142), the avoidance ramp (142) being close to the avoidance slot (14 a).

4. The pressure maintaining jig (999) according to claim 1, characterized in that the mounting base includes a first base (12) and a second base (13);

The first base (12) is stacked on the second base (13), a limit groove (12 a) is formed in one side, facing the second base (13), of the first base (12), a limit space is formed by enclosing the first base (12) and the second base (13), a pressure maintaining clamping groove (13 a) is formed in one side, facing away from the first base (12), of the second base (13), the pressure maintaining clamping groove (13 a) is communicated with the limit groove (12 a) and the outside, and the pressure maintaining piece (14) is inserted into the pressure maintaining clamping groove (13 a).

5. The pressure maintaining jig (999) according to claim 4, wherein the second base (13) is provided with a stopper (131), the stopper (131) being located at an end of the pressure maintaining groove (13 a) away from the first base (12) such that a size of an end of the pressure maintaining groove (13 a) close to the first base (12) is larger than a size of an end of the pressure maintaining groove (13 a) away from the first base (12); the pressure maintaining piece (14) comprises a limiting section and a pressure maintaining section, the size of the pressure maintaining section is smaller than that of the limiting section, and the limiting section is located in the pressure maintaining clamping groove (13 a) and is abutted to the limiting block (131).

6. The pressure maintaining jig (999) according to claim 4, wherein the second base (13) is provided with a plurality of sets of pressure maintaining clamping grooves (13 a), each set of pressure maintaining clamping grooves (13 a) including two sub pressure maintaining clamping grooves.

7. The pressure maintaining jig (999) according to claim 1, characterized in that the pressure maintaining jig (999) comprises a pressure maintaining base (20), the pressure maintaining base (20) is provided with a circulation tool (21), and the circulation tool (21) is provided with an earphone fixing groove (21 a);

The communication tool (21) is arranged on one side of the pressure maintaining base (20) facing the pressure maintaining sleeve (10), the earphone fixing groove (21 a) is arranged at the orthographic projection position of the communication tool (21) corresponding to the pressure maintaining piece (14), and the wireless earphone is arranged in the earphone fixing groove (21 a);

the pressure maintaining sleeve (10) is detachably connected with the pressure maintaining base (20).

8. The pressure maintaining jig (999) according to claim 7, characterized in that the pressure maintaining jig (999) comprises a height adjusting assembly (30);

The two ends of the height adjusting component (30) are respectively connected with the pressure maintaining base (20) and the pressure maintaining sleeve (10), and the height adjusting component (30) is used for adjusting the interval between the pressure maintaining base (20) and the pressure maintaining sleeve (10).

9. The pressure maintaining jig (999) according to claim 4, wherein the pressure maintaining kit (10) further comprises a flexible pad (11), the flexible pad (11) is disposed in the limiting space, and an end of the pressure maintaining member (14) facing away from the pressure maintaining inclined surface is connected with the flexible pad (11).

10. The pressure maintaining jig (999) according to claim 9, characterized in that the flexible pad (11) is provided as a flexible silica gel pad.