Pressure maintaining device

Abstract

The application discloses a pressure maintaining device, which comprises a mounting seat, a fixing tool, a fixing mechanism and a pressure maintaining mechanism. The fixing tool is used for fixing and positioning the earphone middle frame. The fixing mechanism for fixing the ear shell is located above the fixing tool and is movably installed on the mounting seat in the up-down direction. The pressure maintaining mechanism is located above the fixing mechanism and comprises a pressing part, which is movably installed on the mounting seat in the up-down direction. When the pressing part of the pressure maintaining mechanism is controlled to move downward, the fixing mechanism is driven to move downward, so that the ear shell fixed on the fixing mechanism moves toward the fixing tool, and finally the ear shell is pressed on the earphone middle frame, so that the earphone middle frame can be bonded on the ear shell, thereby completing the assembly. The pressure maintaining device can control the pressure maintaining stress and meet the process requirements, improve the assembly precision, and solve the problems that the assembly of the middle frame and the ear shell is difficult and the precision cannot be guaranteed in the existing assembly process.

Description

TECHNICAL FIELD

[0001] The present application relates to earphone assembly technical field, especially earphone assembly technical field, and particularly relates to a pressure maintaining device. BACKGROUND

[0002] In the earphone assembly process, when the middle frame assembly process is involved, the middle frame needs to be glued first, and then assembled to the inner wall of the ear shell. During the assembly process, the deviation of the middle frame and the ear shell center XY direction should be less than 0.15mm. Since the middle frame assembly process is to glue the middle frame and then assemble it with the ear shell, it is necessary to consider that the middle frame can be quickly positioned in the glue machine and the pressure maintaining device, and at the same time, it is also necessary to ensure that the deviation does not occur during the assembly process, so as to ensure the assembly accuracy. Therefore, it is difficult to achieve manually. SUMMARY

[0003] The main purpose of the present application is to provide a pressure maintaining device, which aims to solve the problem that the assembly of the middle frame and the ear shell is difficult and the accuracy cannot be guaranteed in the existing assembly process.

[0004] To achieve the above purpose, the present application provides a pressure maintaining device, wherein the pressure maintaining device comprises:

[0005] a mounting seat;

[0006] a fixing tool mounted on the mounting seat, the fixing tool being used for fixing and positioning the earphone middle frame;

[0007] a fixing mechanism located above the fixing tool, the fixing mechanism being movably mounted on the mounting seat in the upward and downward direction, and the fixing mechanism being used for fixing the ear shell; and

[0008] a pressure maintaining mechanism located above the fixing mechanism, the pressure maintaining mechanism comprising a downward pressing part, the downward pressing part being movably mounted on the mounting seat in the upward and downward direction, and the downward pressing part being used to drive the fixing mechanism to move downward in the downward movement stroke, so that the ear shell is pressed tightly on the earphone middle frame.

[0009] Optionally, the fixing tool comprises a bearing part and a first positioning part provided on the bearing part, the bearing part being used to support the earphone middle frame, and the first positioning part being used to position the earphone middle frame on the bearing part.

[0010] Optionally, the first positioning part comprises a first positioning pin for the positioning hole of the earphone middle frame; and / or

[0011] the first positioning part comprises a first positioning groove for the earphone middle frame.

[0012] Optionally, the fixing tool further comprises a second positioning portion arranged along the circumference of the bearing portion, the second positioning portion being used to abut against the inner wall of the ear shell during the downward movement of the fixing mechanism to adjust the horizontal position of the ear shell.

[0013] Optionally, the mounting seat comprises a base arranged at the bottom of the mounting seat, and the fixing tool is detachably mounted on the base.

[0014] Optionally, the base is formed with a second positioning groove for the fixing tool; and / or,

[0015] The top of the base is provided with a first positioning hole, and the bottom of the fixing tool is further provided with a second positioning pin arranged through the first positioning hole; and / or,

[0016] The bottom of the fixing tool is further provided with a supporting portion, and the top of the base is further provided with an accommodating groove for accommodating the supporting portion.

[0017] Optionally, the fixing mechanism comprises a bearing plate movably arranged along the up-down direction, the upper end surface of the bearing plate is recessed with a first profiling groove for matching the shape of the lower end of the ear shell, the bottom wall of the first profiling groove is provided with a clearance hole penetrating through the bottom of the bearing plate, and the clearance hole is used to provide clearance for the earphone middle frame when the upper end of the earphone middle frame is close to the inner wall of the ear shell.

[0018] Optionally, the fixing mechanism further comprises a clamping plate movably arranged along the up-down direction, the lower end surface of the clamping plate is recessed with a second profiling groove for matching the shape of the upper end of the ear shell, and the clamping plate is arranged above the bearing plate.

[0019] The bearing plate is used to clamp the ear shell between the first profiling groove and the second profiling groove during the movement close to the clamping plate.

[0020] Optionally, the fixing mechanism further comprises a magnetic attraction structure, the magnetic attraction structure comprises a first magnetic attraction portion and a second magnetic attraction portion arranged on the bearing plate and the clamping plate respectively, and the first magnetic attraction portion and the second magnetic attraction portion are used to magnetically attract and fix the bearing plate to the clamping plate when the bearing plate is close to the clamping plate.

[0021] Optionally, the pressure maintaining device further comprises a guide rod extending along the up-down direction, the bearing plate is provided with a first guide hole for the guide rod to pass through, the clamping plate is provided with a second guide hole for the guide rod to pass through, the bearing plate is slidably mounted on the guide rod through the first guide hole, and the clamping plate is slidably mounted on the guide rod through the second guide hole.

[0022] Optionally, the pressure maintaining device further comprises:

[0023] The guide post extends vertically, and its lower end is fixedly connected to the clamping plate.

[0024] A top plate, disposed above the clamping plate, has a through hole for the guide post to pass through, allowing the top plate to move vertically relative to the guide post; the top plate is fixedly connected to the lower pressing part; and...

[0025] An elastic element is disposed between the top plate and the clamping plate so that the fixing mechanism is elastically configured.

[0026] In the technical solution provided by this invention, the earphone mid-frame is fixed and positioned by the fixing fixture to ensure the assembly position of the earphone mid-frame. The ear shell is fixed by the fixing mechanism, which is located above the fixing fixture. The side of the ear shell to be fixed and assembled faces downward, and the side of the earphone mid-frame to be glued faces upward. By controlling the downward movement of the pressing part of the pressure holding mechanism, the fixing mechanism is driven to move downward, causing the ear shell fixed on the fixing mechanism to move closer to the fixing fixture. Finally, the ear shell is pressed tightly onto the earphone mid-frame, so that the earphone mid-frame can be bonded to the ear shell, thereby completing the assembly. The pressure holding device is designed to meet the control of pressure holding force, while also meeting process requirements and improving assembly accuracy, thus solving the problem that the assembly of the mid-frame and ear shell is difficult and the accuracy cannot be guaranteed in the existing assembly process. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a perspective view of an embodiment of the pressure-holding device provided by the present invention;

[0029] Figure 2 for Figure 1 A front view of the pressure-holding device in the middle;

[0030] Figure 3 for Figure 1 A three-dimensional schematic diagram of the pressure-holding device from another perspective;

[0031] Figure 4 for Figure 1 A three-dimensional diagram of the base;

[0032] Figure 5 for Figure 1 A three-dimensional schematic diagram of the fixed tooling in the diagram.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034]

[0035]

[0036] The objectives, features and advantages of the present application will be further illustrated in conjunction with the embodiments, with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0038] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0039] In addition, if the embodiments of the present application involve descriptions such as “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, the meaning of “and / or” appearing throughout the text includes three parallel solutions. Taking “A and / or B” as an example, it includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0040] In the earphone assembly process, when the middle frame assembly process is involved, the middle frame needs to be glued first, and the middle frame is assembled to the inner wall of the ear shell. During the assembly process, the deviation of the middle frame and the ear shell center XY direction should be less than 0.15mm. Since the middle frame assembly process is to glue the middle frame and then assemble it with the ear shell, it is necessary to consider that the middle frame can be quickly positioned in the glue machine and the pressure holding tool, and at the same time, it is also necessary to ensure that there is no deviation during the assembly process to ensure the assembly accuracy. Therefore, it is difficult to achieve manually.

[0041] To solve the above problems, the present application provides a pressure maintaining device, Figure 1 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 2 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 1 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 3 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 1 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 4 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 1 The pressure maintaining device provided by the present application is an embodiment of a perspective view; Figure 5 The pressure maintaining device provided by the present application is an embodiment of a perspective view. Figure 1 The pressure maintaining device provided by the present application is an embodiment of a perspective view.

[0042] Please refer to Figure 1 to Figure 2 , the pressure maintaining device 100 includes a mounting seat 1, a fixing tool 2, a fixing mechanism 3 and a pressure maintaining mechanism 4; the fixing tool 2 is installed on the mounting seat 1, and the fixing tool 2 is used for fixing and positioning the earphone middle frame; the fixing mechanism 3 is located above the fixing tool 2, and the fixing mechanism 3 is movably installed on the mounting seat 1 along the up-down direction, and the fixing mechanism 3 is used for fixing the ear shell; the pressure maintaining mechanism 4 is located above the fixing mechanism 3, and the pressure maintaining mechanism 4 includes a downward pressing part 41, which is movably installed on the mounting seat 1 along the up-down direction, and the downward pressing part 41 is used to drive the fixing mechanism 3 to move downward in the downward movement stroke, so that the ear shell is pressed on the earphone middle frame.

[0043] In the technical scheme provided by the present application, the earphone middle frame is fixed and positioned by the fixing tool 2, the assembly position of the earphone middle frame is ensured, the ear shell is fixed by the fixing mechanism 3, the fixing mechanism 3 is arranged above the fixing tool 2, one side of the ear shell which needs to be fixed and assembled is arranged downward, and one side of the earphone middle frame which is glued is arranged upward, the fixing mechanism 3 is driven to move downward by controlling the downward movement of the downward pressing part 41 of the pressure maintaining mechanism 4, so that the ear shell fixed on the fixing mechanism 3 moves towards the fixing tool 2, the ear shell is finally pressed on the earphone middle frame, the earphone middle frame can be bonded on the ear shell, and the assembly is completed, the pressure maintaining device 100 meets the control of pressure maintaining stress, and also meets the process requirements and improves the assembly precision, so as to solve the problems that the assembly of the middle frame and the ear shell is difficult in the existing assembly process, and the precision cannot be ensured, and the pressure maintaining device 100 has high precision requirement for the workpiece, low debugging difficulty, good stability and good controllability.

[0044] It should be noted that the earphone middle frame can be fixed on the fixing tool 2 by manual feeding, or can be automatically fed by a feeding device. Of course, the ear shell can also be manually fed or automatically fed by a mechanical hand.

[0045] The lower pressing part 41 can be driven by a driving device (a driving motor, etc.), and of course, it can be manually pressed. In order to save labor, a quick clamp can be used to drive the lower pressing part 41 to move downward by rotating the handle of the quick clamp by 180°.

[0046] Further, please refer to Figure 5 In the embodiment, the fixing tool 2 comprises a bearing part 21 and a first positioning part provided on the bearing part 21, the bearing part 21 is used for supporting the earphone middle frame, and the first positioning part is used for positioning the earphone middle frame on the bearing part 21. In actual use, the earphone middle frame can be placed on the bearing part 21 first, in order to make the earphone middle frame be in a preset position during assembly and ensure the assembly precision, the first positioning part is used for precisely positioning the earphone middle frame.

[0047] Specifically, in an embodiment, the first positioning part comprises a first positioning pin 211 for the positioning hole of the earphone middle frame. In this way, the earphone middle frame can be precisely positioned in the horizontal direction by setting the positioning hole on the earphone middle frame in advance and setting the first positioning pin 211 on the bearing part 21, and then sleeving the earphone middle frame on the first positioning pin 211.

[0048] In another embodiment, the first positioning part comprises a first positioning groove 21a for the earphone middle frame. It can be understood that when the shape of the earphone middle frame is irregular, the first positioning groove 21a can be shaped according to the earphone middle frame, and the side wall of the earphone middle frame can be limited by the side wall of the first positioning groove 21a, so as to avoid horizontal displacement.

[0049] It should be noted that the above two associated technical features can be set simultaneously or alternatively. The first positioning pin 211 and the first positioning groove 21a can be provided on the bearing part 21 simultaneously, so as to position the earphone middle frame at the same time. Especially when the shape of the earphone middle frame is regular, the earphone middle frame can be coarsely positioned by the first positioning groove 21a first, and then precisely positioned by the first positioning pin 211. Or when the shape of the earphone middle frame is irregular, the diameter of the positioning hole on the earphone middle frame can be set to be larger than the diameter of the first positioning pin 211, the first positioning groove 21a can be set to be just suitable for the earphone middle frame, the first positioning pin 211 is matched with the positioning hole to achieve coarse positioning, and then the first positioning groove 21a is used to precisely position the earphone middle frame.

[0050] Further, please continue to refer to Figure 5In order to further ensure the assembly accuracy, in the embodiment, the fixing tool 2 further comprises a second positioning portion 22 arranged along the circumference of the bearing portion 21, which is used to abut against the inner wall of the ear shell in the downward movement of the fixing mechanism 3 to adjust the position of the ear shell in the horizontal direction. Since the first positioning portion on the fixing tool 2 can accurately position the earphone middle frame, in order to ensure the accurate positioning of the ear shell in the horizontal direction and ensure the assembly accuracy, the position of the ear shell in the horizontal direction needs to be accurately positioned. The second positioning portion 22 is arranged along the circumference of the bearing portion 21, so that the inner wall of the ear shell can be abutted by the second positioning portion 22. Since the ear shell is in an arched shape, the side wall surface is inclined in the up-down direction. When the ear shell deviates slightly from the set position, the inner wall of the ear shell will abut against the second positioning portion 22 when the ear shell moves downward. With the further downward movement of the ear shell, the second positioning portion 22 exerts a horizontal upward force on the inner wall of the ear shell, so that the ear shell can be adjusted in the horizontal direction along the second positioning portion 22, and finally the outer circumferential side of the second positioning portion 22 is fitted with the inner circumferential wall of the ear shell to accurately adjust the ear shell.

[0051] Specifically, the second positioning portion 22 can be an O-shaped ring, which is sleeved on the circumferential side of the bearing portion 21.

[0052] It should be noted that the fixing mechanism 3 fixes the ear shell, and the fixing mechanism 3 can fix the ear shell in the up-down direction, so that the ear shell has a certain freedom of movement in the horizontal direction. In this way, when the second positioning portion 22 abuts against the ear shell, the ear shell can be adjusted moderately.

[0053] Further, please refer to Figure 4 to Figure 5 In the embodiment, the mounting seat 1 comprises a base 11 arranged at the bottom of the mounting seat 1, and the fixing tool 2 is detachably mounted on the base 11. In this way, before assembling the earphone middle frame and the ear shell, the earphone middle frame can be placed on the fixing tool 2 first, and the fixing tool 2 together with the earphone middle frame is placed on the dispensing platform of the dispensing mechanism to dispense the places that need to be dispensed. After completing the dispensing process, the fixing tool 2 together with the earphone middle frame is placed on the mounting seat 1, so that the earphone middle frame does not need to be positioned at the dispensing station and the pressure maintaining station, thereby improving the assembly efficiency.

[0054] Specifically, in an embodiment, the base 11 is formed with a second positioning groove 11a for placing the fixing tool 2. In this way, by adapting the second positioning groove 11a and the fixing tool 2, the fixing tool 2 can be quickly placed in the second positioning groove 11a, thereby realizing the positioning of the fixing tool 2.

[0055] In another embodiment, the top of the base 11 is provided with a first positioning hole 11b, and the bottom of the fixing tool 2 is further provided with a second positioning pin 23 penetrating through the first positioning hole 11b. In this way, the fixing tool 2 can be sleeved on the second positioning pin 23 through the first positioning hole 11b, and the accurate position of the fixing tool 2 in the horizontal direction can be determined according to the position of the second positioning pin 23, so as to ensure the accurate position of the earphone middle frame in the horizontal direction.

[0056] It should be noted that the above two associated technical features can be set simultaneously or alternatively. The second positioning pin 23 can be provided on the fixing tool 2, and the second positioning groove 11a can be provided on the base 11, so that the fixing tool 2 can be positioned simultaneously.

[0057] Specifically, the bottom of the fixing tool 2 is further provided with a supporting portion 24, and the top of the base 11 is further provided with an accommodating groove 11c for accommodating the supporting portion 24. It can be understood that the height of the supporting portion 24 is greater than the height of the second positioning pin 23. In this way, when the fixing tool 2 is placed on the dispensing platform, the whole fixing tool 2 can be supported by the supporting portion 24, rather than being supported by the second positioning pin 23 to bear the whole weight of the fixing tool 2, so as to avoid deformation of the second positioning pin 23 and cause inaccurate positioning when cooperating with the base 11. It can also be understood that the diameter of the accommodating groove 11c is greater than the supporting portion 24, and the accommodating groove 11c and the supporting portion 24 can also play a role in rough positioning.

[0058] Specifically, please refer to Figure 1 and Figure 3 In this embodiment, the fixing mechanism 3 includes a bearing plate 31 which can be movably arranged in the up-down direction. The upper end surface of the bearing plate 31 is recessed with a first profiling groove 31a which is adapted to the shape of the lower end of the ear shell. The bottom wall of the first profiling groove 31a is provided with a clearance hole 31b penetrating through the bottom of the bearing plate 31, which is used to provide clearance for the earphone middle frame when the upper end of the earphone middle frame is close to the inner wall of the ear shell.

[0059] It can be understood that the first profiling groove 31a can be slightly larger than the lower end of the ear shell. When the ear shell is placed in the first profiling groove 31a, the first profiling groove 31a preliminarily positions the lower end of the ear shell, so that the ear shell can meet the preliminary assembly condition and avoid misalignment of the ear shell and the earphone middle frame in the up-down direction.

[0060] When the ear shell is arranged in the first profiling groove 31a, the opening of the ear shell faces downward. Since the earphone middle frame is assembled to the inner wall of the ear shell, the bottom of the first profiling groove 31a is provided with the clearance hole 31b. The size of the clearance hole 31b is greater than the size of the earphone middle frame carried on the bearing part 21, so that when the fixing mechanism 3 moves downward, the earphone middle frame can enter the ear shell from the clearance hole 31b and be bonded to the inner wall of the ear shell.

[0061] It should be noted that since the first profiling groove 31a is greater than the ear shell, when the second positioning part 22 abuts against the inner wall of the ear shell, the ear shell can be adjusted in translation in the first profiling groove 31a and will not be limited by the side wall of the first profiling groove 31a.

[0062] Further, please continue to refer to Figure 1 to Figure 3 In the embodiment, the fixing mechanism 3 further comprises a clamping plate 32 arranged in the up-down direction and movable. The lower end surface of the clamping plate 32 is concavely provided with a second profiling groove 32a for matching the shape of the upper end of the ear shell. The clamping plate 32 is located above the bearing plate 31. The bearing plate 31 is used to clamp the ear shell between the first profiling groove 31a and the second profiling groove 32a in the stroke close to the clamping plate 32. In this way, the ear shell placed on the bearing plate 31 is clamped and fixed by the clamping plate 32, so as to ensure the stability of the ear shell in the up-down direction and the horizontal direction and prevent the ear shell from being moved at will. The lower end surface of the clamping plate 32 is concavely provided with the second profiling groove 32a for matching the shape of the upper end of the ear shell, so that when the fixing mechanism 3 is driven to move downward by the pressing part 41, the pressing part 41 acts on the clamping plate 32. The pressing plate and the ear shell are in multi-point surface cooperation, the acting surface is increased, and the ear shell is prevented from being damaged when the pressing plate is pressed by a single point.

[0063] Further, when placing the ear shell on the bearing plate 31, it is necessary to first adjust the bearing plate 31 to a low position, that is, close to the bearing part 21, so that the bearing plate 31 and the clamping plate 32 can be far away, and the ear shell can be placed on the bearing plate 31. When the placement is completed, the bearing plate 31 is pushed upwards, so that the bearing plate 31 is close to the clamping plate 32, and the ear shell is clamped between the bearing plate 31 and the clamping plate 32. In order to keep the bearing plate 31 and the clamping plate 32 in a relatively stable state, in this embodiment, the fixing mechanism 3 further comprises a magnetic attraction structure 33, which comprises first and second magnetic attraction parts arranged on the bearing plate 31 and the clamping plate 32, respectively. The first and second magnetic attraction parts are used to magnetically attract and fix the bearing plate 31 to the clamping plate 32 when the bearing plate 31 is close to the clamping plate 32. In this way, the bearing plate 31 and the clamping plate 32 can be attracted by the magnetic attraction structure 33, and kept relatively fixed, so that the lower pressing part 41 can drive the fixing mechanism 3 to move downwards synchronously.

[0064] Further, please refer to Figure 1 In this embodiment, the pressure maintaining device 100 further comprises an upwardly and downwardly extending guide rod 5, the bearing plate 31 is provided with a first guide hole for the guide rod 5 to pass through, and the clamping plate 32 is provided with a second guide hole for the guide rod 5 to pass through. The bearing plate 31 is slidably mounted on the guide rod 5 through the first guide hole, and the clamping plate 32 is slidably mounted on the guide rod 5 through the second guide hole. In this way, when the bearing plate 31 moves up and down, it slides with the guide rod 5 through the first guide hole, so that the bearing plate 31 can move up and down in the set direction, avoiding horizontal displacement to ensure the horizontal position of the ear shell. Similarly, when the lower pressing part 41 drives the fixing mechanism 3 to move downwards, the bearing plate 31 and the clamping plate 32 can simultaneously move up and down in the set direction, while avoiding horizontal displacement of the ear shell.

[0065] Further, in order to control the pressure maintaining force during pressure maintaining, please refer to Figure 1 to Figure 2In the embodiment, the pressure maintaining device 100 further comprises a guide column 6, a top plate 7 and an elastic member 8. The guide column 6 extends in the up-down direction and is fixedly connected to the lower end of the clamping plate 32. The top plate 7 is arranged above the clamping plate 32 and is provided with a through hole for the guide column 6 to pass through, so that the top plate 7 can move up and down relative to the guide column 6, and the top plate 7 is fixedly connected to the pressing portion 41. In this way, when the clamping plate 32 moves up and down relative to the top plate 7, the guide column 6 can guide the movement, and the clamping plate 32 is prevented from moving horizontally relative to the top plate 7. The elastic member 8 is arranged between the top plate 7 and the clamping plate 32, so that the fixing mechanism 3 is elastically arranged. In this way, when the fixing mechanism 3 is driven to move downward by the pressing portion 41, the elastic force of the elastic member 8 gradually increases the force between the fixing mechanism 3 and the fixing tool 2, and the elastic member 8 can be elastically arranged. At the moment when the ear shell on the fixing mechanism 3 abuts against the middle frame of the earphone, the elastic member 8 can play a buffering role, so as to avoid the impact force caused by the excessive pressure at the initial moment of pressure maintaining.

[0066] It should be noted that the elastic member 8 can be a compression spring or a spring, and the elastic member 8 can be sleeved on the guide column 6, or the upper end of the elastic member 8 can be fixed to the top plate 7 and the lower end of the elastic member 8 can be fixed to the clamping plate 32. The present application does not limit the position of the elastic member 8.

[0067] The above description is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation based on the content of the present application and the drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A pressure maintaining device, characterized by, The earphone fixing device comprises: a mounting base; a fixing tool mounted on the mounting base, the fixing tool being used for fixing and positioning an earphone middle frame; a fixing mechanism located above the fixing tool, the fixing mechanism being movably mounted on the mounting base along the up-down direction, the fixing mechanism being used for fixing an ear shell; a pressure maintaining mechanism located above the fixing mechanism, the pressure maintaining mechanism comprising a downward pressing part, the downward pressing part being movably mounted on the mounting base along the up-down direction, the downward pressing part being used for driving the fixing mechanism to move downward in a downward movement stroke so as to press the ear shell on the earphone middle frame. The fixing tool comprises a bearing part and a first positioning part provided on the bearing part, the bearing part being used for supporting the earphone middle frame, the first positioning part being used for positioning the earphone middle frame on the bearing part. The fixing tool further comprises a second positioning part, the second positioning part being arranged along the circumferential direction of the bearing part, the second positioning part being used for abutting against the inner wall of the ear shell in the downward movement stroke of the fixing mechanism so as to adjust the horizontal position of the ear shell.

2. The pressure maintenance device of claim 1, wherein The first positioning part comprises a first positioning pin for the positioning hole of the earphone middle frame; and / or The first positioning part comprises a first positioning groove for the earphone middle frame.

3. The pressure maintaining device according to claim 1 or 2, characterized in that, The mounting base comprises a base provided at the bottom of the mounting base, the fixing tool being detachably mounted on the base.

4. The pressure maintaining device according to claim 3, wherein The base is formed with a second positioning groove for the fixing tool; and / or The top of the base is provided with a first positioning hole, the bottom of the fixing tool is further provided with a second positioning pin penetrating through the first positioning hole; and / or The bottom of the fixing tool is further provided with a supporting part, the top of the base is further provided with an accommodating groove for accommodating the supporting part.

5. The pressure maintenance device of claim 1, wherein The fixing mechanism comprises a bearing plate movably arranged along the up-down direction, the upper end surface of the bearing plate is recessed with a first profiling groove for matching the shape of the lower end of the ear shell, the bottom wall of the first profiling groove is provided with a clearance hole penetrating through the bottom of the bearing plate, the clearance hole being used for providing clearance for the earphone middle frame when the upper end of the earphone middle frame is close to the inner wall of the ear shell.

6. The pressure maintaining device according to claim 5, wherein The fixing mechanism further comprises a clamping plate movably arranged along the up-down direction, the lower end surface of the clamping plate is recessed with a second profiling groove for matching the shape of the upper end of the ear shell, the clamping plate being located above the bearing plate; The bearing plate is used for clamping the ear shell between the first profiling groove and the second profiling groove in the stroke close to the clamping plate.

7. The pressure maintaining device according to claim 6, wherein The fixing mechanism further comprises a magnetic attraction structure, the magnetic attraction structure comprising a first magnetic attraction part and a second magnetic attraction part separately provided on the bearing plate and the clamping plate, the first magnetic attraction part and the second magnetic attraction part being used for magnetically attracting and fixing the bearing plate to the clamping plate when the bearing plate is close to the clamping plate.

8. The pressure maintaining device of claim 6, wherein The pressure maintaining device further comprises a guide rod extending along the up-down direction, the bearing plate is provided with a first guide hole for the guide rod, the clamping plate is provided with a second guide hole for the guide rod, the bearing plate is slidably mounted on the guide rod through the first guide hole, and the clamping plate is slidably mounted on the guide rod through the second guide hole.

9. The pressure maintaining device of claim 6, wherein The pressure maintaining device further comprises: A guide column is arranged to extend in the up-down direction, and the lower end of the guide column is fixedly connected with the clamping plate. A top plate is arranged above the clamping plate, and the top plate is provided with a through hole for the guide column to pass through, so that the top plate can move in the up-down direction relative to the guide column, and the top plate is fixedly connected with the pressing-down part. An elastic member is arranged between the top plate and the clamping plate, so that the fixing mechanism is elastically arranged.

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