Side bonding magnetic attraction jig

Abstract

This utility model relates to a magnetic attraction fixture for side bonding, comprising: a base, on which a trigger positioning device, a permanent magnet absorbing block, and an electromagnetic adsorption block are sequentially arranged; the permanent magnet absorbing block has a first magnetic attraction area around its four sides; the electromagnetic adsorption block has a second magnetic attraction area; a first waveguide sheet has a first magnetic conductive layer on one side and is placed on the permanent magnet absorbing block, the first magnetic conductive layer being in contact with the first magnetic attraction area and the four sides of the first waveguide sheet being adapted to the first magnetic attraction area; a second waveguide sheet has a second magnetic conductive layer on one side and is placed on the electromagnetic adsorption block, the second magnetic conductive layer being in contact with the second magnetic attraction area and the second waveguide sheet being on the same horizontal plane as the first waveguide sheet; the trigger positioning device includes at least a controller, a pressure sensor, and a triggering device, the controller being electrically connected to both the permanent magnet absorbing block and the electromagnetic adsorption block. The fixture exhibits high magnetic stability, achieving precise bonding between waveguide sheets with a thickness of 0.5mm or greater, adapting to the high-speed operation requirements of automated production lines, and improving production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of augmented reality technology, and in particular to a side-bonding magnetic suction fixture. Background Technology

[0002] Side bonding is a crucial step in waveguide fabrication, especially in optical waveguide technology, such as arrayed waveguides, relief grating waveguides, and volume holographic grating waveguides. Side bonding typically involves precisely aligning and fixing two or more waveguide sheets together to achieve light transmission and coupling. This process requires extremely high precision, as even minute deviations can affect the propagation efficiency and imaging quality of the light waves. It ensures the structural integrity and performance consistency of the waveguide sheets. Existing bonding fixtures struggle to precisely control the lateral movement of the waveguide sheets and adjust the adhesion force. For extremely thin waveguide sheets, this process is more prone to problems such as positional deviations and warping, thus affecting bonding quality and efficiency. Utility Model Content

[0003] In view of the problems existing in the prior art, this utility model provides a magnetic suction fixture for side bonding.

[0004] The technical solution of this utility model is as follows:

[0005] A magnetic clamping fixture for side bonding, comprising:

[0006] The base includes three parallel regions: a first region, a second region, and a third region.

[0007] A permanent magnet block is disposed in the first region, and the permanent magnet block has a first magnetic attraction area in at least its four surrounding areas;

[0008] An electromagnetic adsorption block is fixedly installed in the second region, and the electromagnetic adsorption block is provided with a second magnetic adsorption area.

[0009] The first waveguide sheet has a first magnetic layer on one side. The first waveguide sheet is placed on a permanent magnet block. The first magnetic layer is in contact with the first magnetic attraction area and the surrounding area of ​​the first waveguide sheet is adapted to the surrounding area of ​​the first magnetic attraction area.

[0010] The second waveguide sheet has a second magnetic layer on one side. The second waveguide sheet is placed on the electromagnetic adsorption block. The second magnetic layer is in contact with the second magnetic adsorption area and the second waveguide sheet is on the same horizontal plane as the first waveguide sheet.

[0011] The triggering positioning device is arranged in the third area. The triggering positioning device at least includes a controller, a pressure sensor, and a triggering device. The controller is electrically connected to both the permanent magnet absorbing block and the electromagnetic adsorption block. Among them, the triggering positioning device is configured to be able to push the permanent magnet absorbing block towards the second area. When the pressure sensor detects that the pressure of the first waveguide sheet is a preset threshold, the controller suspends the advancement of the triggering positioning device, cancels the magnetic suction force of the first magnetic suction area, and starts the triggering device to complete the side bonding of the first waveguide sheet and the second waveguide sheet through resonance.

[0012] As a preferred technical solution, there is a first initial distance between the electromagnetic adsorption block and the permanent magnet absorbing block, and the first initial distance is 0.1 - 0.3 mm. And there is a second initial distance between the second waveguide sheet and the first waveguide sheet, and the second initial distance is 0.1 - 0.3 mm.

[0013] As a preferred technical solution, the adsorption force of the first magnetic suction area is 0.01 - 0.03 MPa; the adsorption force of the second magnetic suction area is 0.05 - 0.1 MPa.

[0014] As a preferred technical solution, a magnetic force sensor is arranged in at least part of the first magnetic suction area.

[0015] As a preferred technical solution, a strip-shaped permanent magnet or an electromagnetic strip is arranged in the first magnetic suction area; an electromagnetic coil array is arranged in the second magnetic suction area.

[0016] As a preferred technical solution, both the first magnetic conduction layer and the second magnetic conduction layer are silicon steel sheets, and the thickness of the silicon steel sheets is 0.01 - 0.03 mm.

[0017] As a preferred technical solution, the size of the first magnetic suction area is the same as that of the first waveguide sheet; the size of the second magnetic suction area is the same as that of the second waveguide sheet.

[0018] As a preferred technical solution, the first magnetic suction area is in a square frame shape, and the width of the first magnetic suction area is 0.5 - 1 mm.

[0019] As a preferred technical solution, the permanent magnet absorbing block and the electromagnetic adsorption block have the same height.

[0020] As a preferred technical solution, the preset threshold is 0.5 - 1 N.

[0021] The beneficial effects achieved by the technical solution adopted by the present utility model:

[0022] This application discloses a magnetic bonding fixture for side bonding, comprising a base, and a trigger positioning device, a permanent magnet absorbing block, and an electromagnetic adsorption block sequentially disposed on the base. The permanent magnet absorbing block has a first magnetic attraction area around its perimeter for attracting a first waveguide sheet, and the electromagnetic adsorption block has a second magnetic attraction area for attracting a second waveguide sheet. The trigger positioning device pushes the permanent magnet absorbing block toward the electromagnetic adsorption block, thereby achieving side bonding between the first and second waveguide sheets. This fixture achieves precise bonding between two waveguide sheets with a thickness of 0.5 mm or more through precise current control and high magnetic stability, making it more suitable for the high-speed operation requirements of automated production lines, improving production efficiency and product quality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of this utility model. The illustrative embodiments of this utility model and their descriptions explain this utility model and do not constitute an improper limitation of this utility model. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the side-bonding magnetic suction fixture structure disclosed in this embodiment.

[0025] Explanation of reference numerals in the attached figures:

[0026] Base 10; Triggering and positioning device 11; Permanent magnet absorbing block 12; Electromagnetic adsorption block 13; First waveguide plate 14; Second waveguide plate 15. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this utility model, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly stated otherwise.

[0028] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through a medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0030] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] Example

[0032] Existing bonding fixtures are prone to positional deviations and warping during the bonding process, affecting bonding quality and efficiency. According to... Figure 1 This embodiment provides a magnetic suction fixture for side bonding, comprising:

[0033] Base 10 includes a first region, a second region, and a third region arranged side by side;

[0034] A permanent magnet block 12 is disposed in the first region, and the permanent magnet block 12 has a first magnetic attraction area in at least its four sides;

[0035] An electromagnetic adsorption block 13 is fixedly installed in the second region, and the electromagnetic adsorption block 13 is provided with a second magnetic adsorption area.

[0036] The first waveguide 14 has a first magnetic layer on one side. The first waveguide 14 is placed on the permanent magnet block 12. The first magnetic layer is in contact with the first magnetic attraction area and the surrounding area of ​​the first waveguide 14 is adapted to the surrounding area of ​​the first magnetic attraction area.

[0037] The second waveguide 15 has a second magnetic layer on one side. The second waveguide 15 is placed on the electromagnetic adsorption block 13. The second magnetic layer is in contact with the second magnetic adsorption area and the second waveguide 15 and the first waveguide 14 are on the same horizontal plane.

[0038] A trigger positioning device 11 is located in the third region. The trigger positioning device 11 includes at least a controller, a pressure sensor, and a triggering device. The controller is electrically connected to the permanent magnet accumulator 12 and the electromagnetic adsorption block 13. The trigger positioning device 11 is configured to push the permanent magnet accumulator 12 toward the second region. When the pressure sensor detects that the pressure of the first waveguide plate 14 is at a preset threshold, the controller stops the advancement of the trigger positioning device 11 and removes the magnetic attraction force of the first magnetic attraction area. The triggering device is then activated to complete the side bonding of the first waveguide plate 14 and the second waveguide plate 15 through resonance.

[0039] The magnetic bonding fixture proposed in this embodiment includes a base 10, on which a trigger positioning device 11, a permanent magnet 12, and an electromagnetic adsorption block 13 are sequentially arranged. The permanent magnet 12 has a first magnetic attraction area around its perimeter for attracting a first waveguide sheet 14, and the electromagnetic adsorption block 13 has a second magnetic attraction area for attracting a second waveguide sheet 15. The trigger positioning device 11 pushes the permanent magnet 12 toward the electromagnetic adsorption block 13 to achieve side bonding between the first waveguide sheet 14 and the second waveguide sheet 15. This fixture, through precise current control and high magnetic stability, can achieve accurate bonding between two waveguide sheets with a thickness of 0.5 mm or more, making it more suitable for the high-speed operation requirements of automated production lines and improving production efficiency and product quality.

[0040] Specifically, the magnetic suction fixture for side bonding proposed in this embodiment includes a base 10, which can be rectangular or elliptical, preferably rectangular, to facilitate the movement of the permanent magnet block 12 by the trigger positioning device 11. For ease of description in this embodiment, the base 10 is divided into a first region, a second region, and a third region. The trigger positioning device 11 is placed in the third region, the permanent magnet block 12 is placed in the first region, and the electromagnetic adsorption block 13 is placed in the second region. Both the trigger positioning device 11 and the permanent magnet block 12 can move on the base 10, while the electromagnetic adsorption block 13 is fixedly mounted on the base 10. Various methods can be used to ensure its stability, such as adhesive bonding, which has the advantages of simplicity and low cost; the electromagnetic adsorption block 13 can also be directly fixed to the base 10 by welding, which has high stability; mechanical fixing methods can also be used, such as screws, clamps or buckles, which can provide stronger fixing force and can be easily disassembled and repositioned when needed. Regardless of which fixing method is chosen, it needs to be determined according to the specific size, weight and usage environment of the electromagnetic adsorption block 13 to ensure its safety and stability during operation. No specific limitation is made in this embodiment.

[0041] The trigger positioning device 11 also includes a driver, which drives the trigger positioning device 11 to move when powered on. The movement of the trigger positioning device 11 can push the permanent magnet absorbing block 12 to move towards the electromagnetic adsorption block 13. In a preferred embodiment, a slide rail groove is provided on the base 10, preferably in the first region and the third region, and the slide rail grooves in the two regions are connected. The trigger positioning device 11 and the permanent magnet absorbing block 12 are placed in the slide rail groove, which facilitates the smooth movement of the trigger positioning device 11 and the permanent magnet absorbing block 12 along the predetermined path, reduces the possibility of deviation, ensures the accuracy of movement, and also enhances the stability of the trigger positioning device 11 and the permanent magnet absorbing block 12 during movement, reducing displacement caused by vibration or external force.

[0042] Furthermore, the main bodies of the permanent magnet accumulator 12 and the electromagnetic adsorption block 13 are both made of non-magnetic materials, such as aluminum and copper. During the bonding process, the bonding strength or reliability will not be affected by magnetic interference, thus ensuring the bonding quality and reliability.

[0043] Furthermore, a first magnetic layer is provided on the non-optical surface of the first waveguide 14, and a second magnetic layer is provided on the non-optical surface of the second waveguide 15. Both the first and second magnetic layers are preferably silicon steel sheets with a thickness of 0.01-0.03 mm, so that the first magnetic attraction area of ​​the permanent magnet 12 attracts the first magnetic layer to fix the first waveguide 14, and the second magnetic attraction area of ​​the electromagnetic adsorption block 13 attracts the second magnetic layer to fix the second waveguide 15. The permanent magnet accumulator 12 has a first magnetic region around its perimeter, and the electromagnetic adsorption block 13 has a second magnetic region. Preferably, the first magnetic region has a strip permanent magnet or an electromagnetic strip; the second magnetic region has an electromagnetic coil array. Specifically, the base 10 has a permanent magnet accumulator 12 in the second region, and a strip permanent magnet is set around the perimeter of the permanent magnet accumulator 12. The strip permanent magnet can be 0.5-1mm wide and made of neodymium iron boron. Alternatively, the first magnetic region can have an adjustable air gap electromagnetic strip. The magnetic force is concentrated at the edge of the first waveguide plate 14 through the magnetic yoke structure. The central region of the permanent magnet accumulator 12 can be isolated with a non-magnetic material, such as aluminum alloy, which helps to reduce magnetic flux loss in the magnetic circuit and ensures that the central region can move freely when adsorbed at the edge. This placement effectively improves the flexibility and efficiency of magnetic adsorption, while ensuring that it can be released quickly when needed. At least one magnetic sensor can be installed in at least a portion of the first magnetic attraction area. If there are multiple magnetic sensors, they are evenly arranged in the first magnetic attraction area to monitor the magnetic attraction force between the first waveguide sheet 14 and the permanent magnet block 12 in real time and accurately, so as to ensure that the attraction force is stable and meets the operation requirements. If the current is abnormal, such as a short circuit, the system will automatically cut off the power for protection.

[0044] Furthermore, it is preferably that there is a first initial spacing between the electromagnetic adsorption block 13 and the permanent magnet adsorption block 12, the first initial spacing is 0.1 - 0.3 mm, and there is a second initial spacing between the second waveguide sheet 15 and the first waveguide sheet 14, the second initial spacing is 0.1 - 0.3 mm. The first initial spacing refers to the natural distance between the electromagnetic adsorption block 13 and the permanent magnet adsorption block 12 without external force. Such an initial spacing design is to ensure that they will not generate unnecessary magnetic force attraction due to magnetic field interaction in the static state, and at the same time are close enough to be able to respond quickly and adsorb when needed. The first initial spacing and the second initial spacing are not specifically limited in this embodiment and are set by those skilled in the art according to actual needs.

[0045] Preferably, the adsorption force of the first magnetic adsorption area is 0.01 - 0.03 MPa; the adsorption force of the second magnetic adsorption area is 0.05 - 0.1 MPa. The specific adsorption force is set according to the actual use scenario. In this embodiment, the second magnetic adsorption area provides a larger magnetic suction force, which can effectively prevent the second waveguide sheet 15 from moving during the bonding process, ensuring the stability and precision of the process. The first magnetic adsorption area provides a smaller magnetic suction force, which is used to promote the bonding of the first waveguide sheet 14 and the second waveguide sheet 15, ensuring that the two waveguide sheets can be aligned smoothly and accurately, and reducing the risk of damage to the waveguide sheet material.

[0046] In a preferred embodiment, the first magnetic adsorption area is in a shape of a double-square frame, and the width of the first magnetic adsorption area is 0.5 - 1 mm. The double-square frame design can provide a stable magnetic connection, enabling the first waveguide sheet 14 to be firmly adsorbed on the permanent magnet adsorption block 12, ensuring that it will not fall off easily during movement.

[0047] The size of the first waveguide sheet 14 can be less than or equal to the size of the outer perimeter of the first magnetic adsorption area, and the size of the second waveguide sheet 15 can be less than or equal to the size of the second magnetic adsorption area. It is necessary to ensure that one side of the first waveguide sheet 14 is aligned with one side of the first magnetic adsorption area, and one side of the second waveguide sheet 15 is aligned with one side of the second magnetic adsorption area. Specifically, it refers to the side where the first waveguide sheet 14 and the second waveguide sheet 15 are bonded to each other, ensuring a tight fit between the waveguide sheet and the magnetic adsorption area, which is beneficial to improving the precision and stability during the bonding process, thereby improving the stability and transmission efficiency of the system. Preferably, the first magnetic adsorption area has the same size as the first waveguide sheet 14, and the second magnetic adsorption area has the same size as the second waveguide sheet 15, which is easy to achieve precise alignment and reduces the error during installation.

[0048] In a preferred embodiment, a first baffle can be provided on at least a portion of the edge area of ​​the permanent magnet absorbing block 12, and a second baffle can be provided on at least a portion of the edge area of ​​the electromagnetic adsorption block 13. The first baffle is located on opposite sides of the permanent magnet absorbing block 12, and no baffle is provided on the other parallel sides. This can be understood as the edge area where the first waveguide sheet 14 and the second waveguide sheet 15 are bonded is not baffled. In order to increase the bonding stability and the concentration of magnetic force, the entire fixture is more compact and reliable. The other side opposite to the bonding is convenient to contact the pressure sensor on the trigger positioning device 11, and the sensitivity is better. The material and height of the first baffle and the second baffle are not specifically limited, as long as they serve to restrict the first waveguide sheet 14 and the second waveguide sheet 15.

[0049] The trigger positioning device 11 is located in the third area. The trigger positioning device 11 includes at least a controller, a pressure sensor, and a triggering device. The controller is electrically connected to the permanent magnet block 12 and the electromagnetic adsorption block 13.

[0050] In actual operation, the trigger positioning device 11 is higher than the permanent magnet accumulator 12. A pressure sensor is installed on the trigger positioning device 11, in the area opposite to the first waveguide plate 14. As the trigger positioning device 11 moves, it contacts the permanent magnet accumulator 12, at which point the pressure sensor contacts the middle area of ​​the side of the first waveguide plate 14. When the pressure reaches 0.5-1N, the signal is transmitted to the controller, which controls the trigger positioning device 11 to stop its advancing action and simultaneously cancels the magnetic attraction of the first magnetic attraction area. The trigger devices located on both sides of the pressure sensor are then activated, maintaining resonance for 10-15 seconds to eliminate the gap between the first waveguide plate 14 and the second waveguide plate 15 and simultaneously complete the side molecular bonding. After bonding is completed, the magnetism of the first magnetic region of the first waveguide plate 14 is first broken, and then the current of the second waveguide plate 15 is gradually reduced to prevent stress sudden changes from causing the first waveguide plate 14 and / or the second waveguide plate 15 to break.

[0051] The foregoing has provided a detailed description of a side-bonding magnetic suction fixture according to an embodiment of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A side-bonding magnetic attraction jig, comprising: Comprising: A base, including a first area, a second area, and a third area arranged in parallel; A permanent magnet suction block, arranged in the first area, and at least the surrounding area of the permanent magnet suction block is provided with a first magnetic suction area; An electromagnetic adsorption block, fixedly arranged in the second area, and a second magnetic suction area is provided on the electromagnetic adsorption block; A first waveguide sheet, one side of the first waveguide sheet is provided with a first magnetic conductive layer, the first waveguide sheet is placed on the permanent magnet suction block, the first magnetic conductive layer contacts the first magnetic suction area and the surrounding area of the first waveguide sheet is adapted to the surrounding area of the first magnetic suction area; A second waveguide sheet, one side of the second waveguide sheet is provided with a second magnetic conductive layer, the second waveguide sheet is placed on the electromagnetic adsorption block, the second magnetic conductive layer contacts the second magnetic suction area and the second waveguide sheet is on the same horizontal plane as the first waveguide sheet; A trigger positioning device, arranged in the third area, the trigger positioning device at least includes a controller, a pressure sensor, and a trigger device, and the controller is electrically connected to both the permanent magnet suction block and the electromagnetic adsorption block; wherein, the trigger positioning device is configured to be able to push the permanent magnet suction block towards the second area, when the pressure sensor detects that the pressure of the first waveguide sheet is a preset threshold value, the controller stops the advancement of the trigger positioning device, cancels the magnetic suction force of the first magnetic suction area, and starts the trigger device to complete the side bonding of the first waveguide sheet and the second waveguide sheet through resonance.

2. The magnetic suction fixture according to claim 1, wherein There is a first initial distance between the electromagnetic adsorption block and the permanent magnet suction block, the first initial distance is 0.1 - 0.3 mm, and there is a second initial distance between the second waveguide sheet and the first waveguide sheet, the second initial distance is 0.1 - 0.3 mm.

3. The magnetic suction fixture according to claim 1, wherein The adsorption force of the first magnetic suction area is 0.01 - 0.03 MPa; the adsorption force of the second magnetic suction area is 0.05 - 0.1 MPa.

4. The magnetic attraction jig of claim 1, wherein, At least part of the area of the first magnetic suction area is provided with a magnetic force sensor.

5. The magnetic attraction jig of claim 4, wherein, The first magnetic suction area is provided with a strip-shaped permanent magnet or an electromagnetic strip; the second magnetic suction area is provided with an electromagnetic coil array.

6. The magnetic attraction jig of claim 5, wherein, Both the first magnetic conductive layer and the second magnetic conductive layer are silicon steel sheets, and the thickness of the silicon steel sheets is 0.01 - 0.03 mm.

7. The magnetic attraction jig of claim 6, wherein, The size of the first magnetic suction area is the same as that of the first waveguide sheet; the size of the second magnetic suction area is the same as that of the second waveguide sheet.

8. The magnetic attraction jig of claim 7, wherein, The first magnetic suction area is in a shape of a rectangle with a hollow center, and the width of the first magnetic suction area is 0.5 - 1 mm.

9. The magnetic attraction fixture of any one of claims 1-8, wherein, The permanent magnet suction block and the electromagnetic adsorption block have the same height.

10. The magnetic attraction fixture of any one of claims 1-8, wherein, The preset threshold value is 0.5 - 1 N.

Images