Pressure holding device

Abstract

The present invention discloses a pressure-holding device. The pressure-holding device includes a base body, a pressure-holding mechanism, and a buffer mechanism. The pressure-holding mechanism includes a pressure head assembly that is movably disposed on the base body in the vertical direction, and a limiting portion protrudes from the side of the pressure head assembly. The buffer mechanism includes a guiding portion disposed beside the pressure head assembly. The upper end portion of the guiding portion has a guiding surface extending in the horizontal direction, and the guiding surface is inclined in the vertical direction in the horizontal direction. The guiding portion is disposed below the limiting portion, and the limiting portion is supported on the guiding surface. The guiding portion is movably disposed on the base body in the horizontal direction to drive the limiting portion to drive the pressure head assembly to move up and down during its moving stroke. By arranging the guiding surface to be inclined, when the guiding portion moves gradually away from the limiting portion in the horizontal direction, the descending speed of the limiting portion is reduced to a minimum, and the speed tends to zero, so that the speed at which the pressure head assembly presses on the product to be pressure-held also approaches zero, solving the problems of low pressure-holding efficiency and easy damage to precision components to be pressure-held in the existing pressure-holding devices.

Description

Technical Field

[0001] The present invention relates to the technical field of earphone production equipment, and particularly to a pressure maintaining device. Background Art

[0002] During the production process of TWS earphones, pressure maintaining is a most common production process. After each component is dot-glued or bonded with double-sided tape, it needs to be statically pressure-maintained for a certain period of time. At present, most pressure maintaining mechanisms use cylinders to install pressure maintaining heads for pressure maintaining. However, for some precision components (fragile or damaged), it is very easy to be damaged in this type of pressure maintaining mechanism. This is mainly because there is a large speed during the extension of the cylinder, which will generate a large impact force. Although the speed of the cylinder can be reduced by a throttle valve, this will seriously affect the operation efficiency, and only reduce the speed to a certain extent. There will still be an impact force, which will still affect the product. Summary of the Invention

[0003] The main object of the present invention is to propose a pressure maintaining device, aiming to solve the problems of low pressure maintaining efficiency of the existing pressure maintaining device and easy damage to precision parts to be pressure-maintained.

[0004] To achieve the above object, a pressure maintaining device proposed by the present invention includes:

[0005] A seat body;

[0006] A pressure maintaining mechanism, including a pressure head assembly movably arranged on the seat body in the up and down direction, and a limiting portion protruding beside the pressure head assembly; and,

[0007] A buffer mechanism, including a guiding portion arranged beside the pressure head assembly, an upper end portion of the guiding portion having a guiding surface extending in the transverse direction, the guiding surface being inclined in the up and down direction in the transverse direction, the guiding portion being arranged below the limiting portion, the limiting portion being supported on the guiding surface, and the guiding portion being movably arranged on the seat body in the transverse direction to drive the limiting portion to drive the pressure head assembly to move up and down during its moving stroke.

[0008] Optionally, the guiding surface includes an arc concave surface arranged in an arc shape, and the arc concave surface faces the limiting portion.

[0009] Optionally, the guiding surface further includes a guiding inclined surface inclined in the up and down direction, and the guiding inclined surface is adjacent to the lower end of the arc concave surface.

[0010] Optionally, the guiding portion and the limiting portion are respectively provided with magnets that are magnetically repulsive to each other.

[0011] Optionally, one of the two magnets is an electromagnet, and the magnitude of the current of the electromagnet can be controlled to adjust the magnitude of the repulsive force between the electromagnet and the other magnet.

[0012] Optionally, the buffer mechanism further includes:

[0013] A support base, provided on the seat body, and the guiding portion is slidably supported on the support base in the transverse direction; and,

[0014] A driving device, provided on the seat body, the driving device includes a driving portion movably arranged in the transverse direction, and the driving portion is fixedly connected to the guiding portion for driving the guiding portion to move in the transverse direction.

[0015] Optionally, a rolling portion is provided at the upper end of the support base, and the guiding portion is provided on the rolling portion.

[0016] Optionally, the pressure maintaining mechanism includes:

[0017] A mounting base, provided on the seat body;

[0018] A guide rail, provided on the mounting base and extending in the vertical direction;

[0019] A slider, having a chute opened in the vertical direction, the chute is slidably engaged with the guide rail, and the limiting portion is provided on the slider; and,

[0020] A pressing head, provided at the lower end of the slider.

[0021] Optionally, the pressing head assembly further includes a counterweight block provided on the slider.

[0022] Optionally, the counterweight block is provided with a mounting hole;

[0023] A positioning protrusion is provided on the slider, and the positioning protrusion is inserted and engaged with the mounting hole of the counterweight block.

[0024] In the technical solution provided by the present invention, the indenter assembly is movably arranged on the seat body in the vertical direction. When the indenter assembly moves downward, it performs pressure holding on the product to be pressure held. A limiting portion is convexly provided beside the pressure holding assembly. The limiting portion is supported on the guiding surface at the upper end of the guiding portion. The guiding surface is inclined in the vertical direction along the horizontal direction. When the guiding portion moves horizontally, the guiding surface drives the limiting portion to move up and down, thereby driving the indenter assembly to move up and down. By driving the indenter assembly to move up and down during the horizontal movement stroke of the guiding portion provided beside the indenter assembly, due to the inclined arrangement of the guiding surface, when the guiding portion moves horizontally and gradually moves away from the limiting portion, the descending speed of the limiting portion drops to a minimum and the speed tends to zero, so that the descending speed of the indenter assembly pressing on the product to be pressure held also approaches zero. The indenter assembly contacts the product to be pressure held, and the guiding portion continues to move horizontally until the limiting portion is no longer supported on the guiding portion. The indenter assembly performs pressure holding on the product to be pressure held by its own gravity, solving the problems of low pressure holding efficiency of the existing pressure holding device and easy damage to the precision parts to be pressure held. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0026] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the pressure holding device provided by the present invention;

[0027] Figure 2 It is Figure 1 a three-dimensional schematic diagram of the pressure holding mechanism in

[0028] Figure 3 It is Figure 1 a three-dimensional schematic diagram of the buffer mechanism in

[0029] Description of the reference numerals in the drawings:

[0030] Label Name Label Name 100 Pressure holding device 26 Ram 1 Seat body 3 Buffer mechanism 2 Pressure holding mechanism 31 Guide part 21 Ram assembly 311 Guide surface 211 Counterweight 311a Arc concave surface 22 Limit part 311b Guide inclined plane 23 Mounting seat 32 Support seat 24 Guide rail 33 Drive device 25 Slider 34 Rolling part

[0031] The realization, functional characteristics and advantages of the object of the present invention will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0034] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. 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 solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] During the production process of TWS earphones, pressure holding is a most common production process. After the components are completed with dispensing or bonded through double-sided tape, it is necessary to perform static pressure holding for a certain period of time. Currently, most pressure holding mechanisms use cylinders to install pressure holding heads for pressure holding. However, for some precision components (fragile or prone to breakage), it is very easy to be damaged in this type of pressure holding mechanism. This is mainly because there is a large speed during the extension of the cylinder, which will generate a large impact force. Although the speed of the cylinder can be reduced through a throttle valve, this will seriously affect the operation efficiency, and only reduce the speed to a certain extent. There will still be an impact force, which will still affect the product.

[0036] To solve the above problems, the present invention provides a pressure holding device 100, Figures 1 to 3 which is a specific embodiment of the pressure holding device 100 provided by the present invention.

[0037] Please refer to Figure 1, the pressure-holding device 100 includes a base body 1, a pressure-holding mechanism 2 and a buffer mechanism 3. The pressure-holding mechanism 2 includes a ram assembly 21 movably arranged on the base body 1 in the vertical direction, and a limiting portion 22 protrudes from the side of the ram assembly 21. The buffer mechanism 3 includes a guiding portion 31 arranged beside the ram assembly 21. The upper end portion of the guiding portion 31 has a guiding surface 311 extending in the lateral direction. The guiding surface 311 is inclined in the vertical direction in the lateral direction. The guiding portion 31 is arranged below the limiting portion 22, and the limiting portion 22 is supported on the guiding surface 311. The guiding portion 31 is movably arranged on the base body 1 in the lateral direction to drive the limiting portion 22 to drive the ram assembly 21 to move up and down during its moving stroke.

[0038] In the technical solution provided by the present invention, the ram assembly 21 is movably arranged on the base body 1 in the vertical direction. When the ram assembly 21 moves upward, a product to be pressure-held can be placed below the ram assembly 21. When the ram assembly 21 moves downward, the product to be pressure-held is pressure-held. A limiting portion 22 protrudes from the side of the pressure-holding assembly. The limiting portion 22 is supported on the guiding surface 311 at the upper end of the guiding portion 31. The guiding surface 311 is inclined in the vertical direction in the lateral direction. When the guiding portion 31 moves in the lateral direction, the guiding surface 311 drives the limiting portion 22 to move up and down, thereby driving the ram assembly 21 to move up and down. By driving the ram assembly 21 to move up and down during the moving stroke of the guiding portion 31 arranged beside the ram assembly 21 in the lateral direction, due to the inclined arrangement of the guiding surface 311, when the guiding portion 31 moves gradually away from the limiting portion 22 in the lateral direction, the descending speed of the limiting portion 22 decreases to a minimum and the speed tends to zero, so that the speed at which the ram assembly 21 presses down on the product to be pressure-held also approaches zero. The ram assembly 21 contacts the product to be pressure-held. The guiding portion 31 continues to move in the lateral direction until the limiting portion 22 is no longer supported on the guiding portion 31, and the ram assembly 21 presses the product to be pressure-held by its own gravity, solving the problems of low pressure-holding efficiency of the existing pressure-holding device 100 and easy damage to precision parts to be pressure-held.

[0039] It should be noted that the ram assembly 21 presses the product to be pressure-held by its own gravity, and the acting force on the product to be pressure-held completely depends on the gravity of the ram assembly 21. The gravity of the ram assembly 21 is controllable, which is more reliable than directly controlling the magnitude of the pressure-holding force by driving the moving stroke of the ram assembly 21 through a driving device 33 and is not affected by factors such as manufacturing tolerances of the product to be pressure-held.

[0040] Specifically, since the up-and-down movement speed of the indenter assembly 21 depends on the movement speed of the guiding part 31 and the inclination degree of the guiding surface 311, when the movement rate of the guiding part 31 is constant, the smaller the inclination degree of the guiding surface 311, the smaller the speed at which the indenter assembly 21 presses down on the product to be pressure-maintained. In order to better control the slope of the guiding surface 311 so that the indenter assembly 21 can press down on the product to be pressure-maintained at the minimum speed, please refer to Figure 3 , in this embodiment, the guiding surface 311 includes an arc concave surface 311a arranged in an arc shape, and the arc concave surface 311a faces the limiting part 22. The tangent direction of the part of the arc concave surface 311a close to the lower end can be set to be along the horizontal direction. In this way, when the limiting part 22 moves to be close to the lowest point of the arc concave surface 311a, the slope here is almost zero, so that the indenter assembly 21 can press down on the product to be pressure-maintained at a speed approaching zero. Moreover, since the guiding surface 311 is arranged in an arc shape, when the guiding part 31 moves, the limiting part 22 can move smoothly and continuously in the up-and-down direction.

[0041] Furthermore, since the guiding part 31 is far from the limiting part 22, after the indenter assembly 21 finishes pressure-maintaining, it is necessary to lift the indenter assembly 21 again to cycle the next pressure-maintaining process. At this time, it is necessary to drive the guiding part 31 to move horizontally close to the limiting part 22. In order to enable the limiting part 22 to smoothly transition and support on the guiding surface 311, in this embodiment, the guiding surface 311 further includes a guiding inclined surface 311b arranged in an inclined manner in the up-and-down direction, and the guiding inclined surface 311b is adjacent to the lower end of the arc concave surface 311a. In this way, through the guiding action of the guiding inclined surface 311b, the limiting part 22 can better transition to the guiding surface 311.

[0042] Further, in order to make the buffering effect of the indenter assembly 21 better, in this embodiment, the guiding part 31 and the limiting part 22 are respectively provided with magnets (not shown in the figure) that repel each other magnetically. When the limiting part 22 interacts with the guiding surface 311, the repulsive magnetic force can play a certain buffering role, so that the speed at which the indenter assembly 21 acts on the product to be pressure-maintained is further slowed down.

[0043] Specifically, in this embodiment, one of the two magnets is an electromagnet, and the magnitude of the current of the electromagnet can be controlled to adjust the magnitude of the repulsive force between the electromagnet and the other magnet. Thus, in the case where the heights of the products to be pressure-maintained are inconsistent, there is no need to adjust the shape and curvature parameters of the guiding inclined surface 311b of the guiding portion 31, and the movement amplitude and movement rate of the limiting portion 22 can also be adjusted by changing the magnitude of the current, so as to adjust the movement amplitude and movement rate of the pressing head assembly 21.

[0044] Specifically, in order to enable the guiding portion 31 to move smoothly in the lateral direction, in this embodiment, the buffer mechanism 3 further includes a driving device 33 and a support seat 32 provided on the base body 1. The driving device 33 includes a driving portion that is movably provided in the lateral direction. The driving portion is fixedly connected to the guiding portion 31. The support seat 32 is provided on the base body 1, and the driving portion drives the guiding portion 31 to be slidably supported on the support seat 32 in the lateral direction. With such a setting, the guiding portion 31 slides along the upper end portion of the support seat 32, reducing the shearing force of the driving portion in the up and down directions, and also avoiding the influence of the gravity factor of the guiding portion 31 on the movement trajectory of the guiding portion 31 in the lateral direction.

[0045] Further, in this embodiment, a rolling portion 34 is provided at the upper end portion of the support seat 32, and the guiding portion 31 is provided on the rolling portion 34. Thus, during the sliding process of the guiding portion 31, the rolling portion 34 provides assistance, reducing the sliding friction of the guiding portion 31. Specifically, the rolling portion 34 can be a roller or a ball.

[0046] Specifically, please refer to Figure 2 , in this embodiment, the pressure-maintaining mechanism 2 includes a mounting seat 23, a guide rail 24, a slider 25 and a pressing head 26. The mounting seat 23 is provided on the base body 1. The guide rail 24 is provided on the mounting seat 23 and extends in the up and down direction. The slider 25 is provided with a chute in the up and down direction, and the chute is slidably matched with the guide rail 24. The limiting portion 22 is provided on the side portion of the slider 25, and the pressing head 26 is provided at the lower end of the slider 25. When the limiting portion 22 moves up and down, the limiting portion 22 drives the slider 25 to move, and the slider 25 is slidably matched with the guide rail 24. The guide rail 24 has a certain guiding effect, enabling the pressing head 26 to move smoothly in the up and down direction and accurately pressing the portion of the product to be pressure-maintained that can be pressed.

[0047] Furthermore, since the pressure maintaining mechanism 2 completely relies on its own gravity to provide pressure, in this embodiment, the pressure maintaining mechanism 2 further includes a counterweight 211 disposed on the slider 25. Since different products to be pressure maintained require different pressures, the pressure exerted by the pressing head 26 on the product to be pressure maintained can be adjusted by setting counterweights 211 of different weights.

[0048] Specifically, in order to facilitate the replacement of the counterweight 211, in this embodiment, the counterweight 211 is provided with a mounting hole, and the slider 25 is provided with a positioning protrusion, and the positioning protrusion is inserted and fitted with the mounting hole of the counterweight 211. Of course, the specific form of the counterweight 211 is not limited to the above-mentioned pin hole insertion and fitting method, and the slider 25 and the counterweight 211 can also be connected by magnetic attraction, or a receiving groove can be provided on the slider 25 for the counterweight 211 to be placed.

[0049] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A pressure-holding device, characterized in that, it includes: a seat body; a pressure-holding mechanism, including a pressure head assembly movably arranged along the up-and-down direction on the seat body, and a limiting part protruding beside the pressure head assembly; and, a buffer mechanism, including a guiding part arranged beside the pressure head assembly, the upper end of the guiding part having a guiding surface extending transversely, the guiding surface being inclined in the up-and-down direction transversely, the guiding part being arranged below the limiting part, the limiting part being supported on the guiding surface, and the guiding part being movably arranged transversely on the seat body to drive the limiting part to drive the pressure head assembly to move up and down during its moving stroke; The buffer mechanism further includes: a support seat arranged on the seat body, and the guiding part being slidably supported transversely on the support seat; and, a driving device arranged on the seat body, the driving device including a driving part movably arranged transversely, the driving part being fixedly connected to the guiding part for driving the guiding part to move transversely.

2. The pressure-holding device according to claim 1, characterized in that, the guiding surface includes an arc concave surface arranged in an arc shape, and the arc concave surface faces the limiting part.

3. The pressure-holding device according to claim 2, characterized in that, the guiding surface further includes a guiding inclined surface inclined in the up-and-down direction, and the guiding inclined surface is adjacent to the lower end of the arc concave surface.

4. The pressure-holding device according to claim 1, characterized in that, magnets with mutually repulsive magnetism are respectively arranged on the guiding part and the limiting part.

5. The pressure-holding device according to claim 4, characterized in that, one of the two magnets is an electromagnet, and the magnitude of the current of the electromagnet can be controlled to adjust the magnitude of the repulsive force between the electromagnet and the other magnet.

6. The pressure-holding device according to claim 1, characterized in that, a rolling part is arranged at the upper end of the support seat, and the guiding part is arranged on the rolling part.

7. The pressure-holding device according to claim 1, characterized in that, the pressure-holding mechanism includes: a mounting seat arranged on the seat body; a guide rail arranged on the mounting seat and extending along the up-and-down direction; a slider having a chute opened along the up-and-down direction, the chute being in sliding fit with the guide rail, and the limiting part being arranged on the slider; and a pressure head arranged at the lower end of the slider.

8. The pressure-holding device according to claim 7, characterized in that, the pressure head assembly further includes a counterweight arranged on the slider.

9. The pressure-holding device according to claim 8, characterized in that, the counterweight is provided with a mounting hole; a positioning protrusion is arranged on the slider, and the positioning protrusion is inserted and matched with the mounting hole of the counterweight.

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