JP2015156321A - Light guide plate-processing device, and light guide plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light guide plate-processing device in which a processing hone contacts a correct position of a light guide plate, and to provide the light guide plate.

SOLUTION: A processing device which makes recessed scattered parts on a light guide plate 1 comprises: a processing hone drive member 30 which freely moves a processing hone; the processing hone which is connected to the processing hone drive member 30, and in which a plurality of processing parts having forms which are inverted with respect to the scattered parts 2 of the light guide plate 1 are formed on a leading end of the processing hone; a placing part 10 on which the light guide plate 1 is placed; and a light guide plate-pressing member 40 arranged at least at a part of a periphery of the processing hone 20. The light guide plate-pressing member 40 presses the light guide plate 1 to the placing part 10 before the processing hone 20 contacts the light guide plate 1 and starts the processing.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a light guide plate processing apparatus and a light guide plate.

  Conventionally, various ultrasonic processing apparatuses for processing a plastic plate or the like by ultrasonic processing are known. Such an ultrasonic processing apparatus includes a moving mechanism for moving the processing portion to three-dimensional orthogonal coordinates. Then, the processing apparatus moves the processing unit based on the input information and performs processing on the processing target. When performing the processing, the processing apparatus uses an ultrasonic processing horn that contacts the processing object and forms a pattern on the surface of the processing object (Patent Document 1).

  However, according to such an ultrasonic processing device, even if the backlash of the ultrasonic processing horn is prevented and the position is accurately controlled, the light guide plate itself is curved to some extent in the state of the product depending on the conditions and method at the time of manufacture. Or may be warped. In addition, the light guide plate may be warped or curved due to vibration during transportation, temperature, or the like. In this case, when the light guide plate is installed on the table, it may float from the table and the processing horn may not come into contact with the correct position. If the light guide plate is floating in this way, it may be processed to a position different from the normal position, or the processing horn may move on the light guide plate when the light guide plate sinks during processing. As a result, there is a possibility that a case where the processing cannot be performed at an accurate position and an accurate shape may occur.

Registered Utility Model No. 3119579

  The present invention has been made to solve such a problem, and a processing horn can be brought into contact with an accurate position with respect to a light guide plate and processed into an intended shape at an intended accurate position. The main object is to provide a light guide plate processing apparatus and a light guide plate processed by the light guide plate processing apparatus.

  The present invention adopts the following means in order to achieve the above-mentioned object.

The light guide plate processing apparatus according to the present invention is:
In a processing apparatus for processing a concave diffusion portion on a light guide plate,
A processing horn formed with a processing part for forming a diffusion part of the light guide plate;
A machining horn drive member for freely moving the machining horn directly or indirectly connected;
A placement section on which the light guide plate is placed;
A light guide plate pressing member disposed on at least a part of the periphery of the processing horn;
With
The light guide plate pressing member presses the light guide plate against the mounting portion before the processing horn contacts and processes the light guide plate.

  According to the light guide plate processing apparatus according to the present invention, before the processing horn contacts and processes the light guide plate, the vicinity of the portion to be processed of the light guide plate is pressed and fixed to the mounting portion by the light guide plate pressing member. And then processed. Therefore, even when the light guide plate is warped or curved and floats from the placement portion, the light guide plate can be processed while being pressed against the placement portion. Therefore, it is possible to prevent the machining of a position different from the original machining position as much as possible. In addition, if the light guide plate is lifted from the mounting portion, the light guide plate is in contact with the processing horn at an angle, so that the processing portion of the processing horn is not uniformly pressed into the light guide plate and the diffusion portion is intended. There is a possibility that the shape cannot be processed, or the depth of the diffusing portion is uneven depending on the position. However, since the light guide plate is brought into close contact with the placement portion by pressing the light guide plate against the placement portion, the processing portion is press-fitted in parallel to the light guide plate, so that all the diffusion portions are formed on the processing portion of the processing horn. It becomes easy to process according to the shape and uniformly.

  Furthermore, in the light guide plate processing apparatus according to the present invention, the light guide plate pressing member is directly or indirectly connected to a processing horn drive member that moves the processing horn up and down, It may be characterized by moving up and down accordingly. As a result, both the processing horn and the light guide plate pressing member can be moved up and down by the processing horn drive member, which contributes to cost reduction because only one drive means is required, and is linked with the drive means of the processing horn. The light guide plate can be fixed to the mounting portion at a suitable timing in accordance with the movement of the processing horn.

  Furthermore, in the light guide plate processing apparatus according to the present invention, the light guide plate pressing member is configured so that the pressing amount of the light guide plate pressing member can be adjusted when the processing horn driving member is excessively lowered. It may be characterized by being fixed to be slidable in the vertical direction with respect to the driving member. By adopting such a configuration, it is not necessary to pinpoint the processing distance of the processing horn drive member regardless of the thickness of the light guide plate, and the pressing distance of the light guide plate pressing member is automatically adjusted. Therefore, it is possible to avoid the trouble of adjusting the lowering distance of the light guide plate pressing member anew.

  Furthermore, in the light guide plate processing apparatus according to the present invention, an elastic member may be provided between the light guide plate pressing member and the processing horn drive member. By adopting such a configuration, even if the processing horn driving member excessively lowers the light guide plate pressing member, it can be adjusted by the elastic member. Thereby, some errors in the pressing amount can be eliminated. Further, by using the elastic member, the light guide plate pressing member can be urged downward while pressing the light guide plate, so that the light guide plate is continuously pressed during processing with the processing horn. be able to.

  Furthermore, in the light guide plate processing apparatus according to the present invention, the elastic member may be a spring. By adopting such a configuration, the pressing amount can be effectively adjusted by the pressing member, and the light guide plate can be reliably held.

  Moreover, the light-guide plate processing apparatus concerning this invention WHEREIN: The said light-guide plate press member may be arrange | positioned so that the perimeter of the said processing horn may be enclosed. By providing the light guide plate pressing member so as to surround the entire circumference, it is possible to press and fix the four sides of the processing area, so that the light guide plate can be more securely fixed to the mounting portion and diffused to a more accurate position. The part can be processed.

  Furthermore, the light guide plate processing apparatus according to the present invention may be characterized in that urethane, rubber or other cushioning material is disposed on the bottom surface of the light guide plate pressing member. By adopting such a configuration, it is possible to reduce the impact when pressing the light guide plate, and to reduce the possibility of damage to the light guide plate.

  The light guide plate processed by the above-described light guide plate processing apparatus has a plurality of diffusion portions formed on the surface. Therefore, it is possible to provide a light guide plate capable of effectively diffusing the light introduced into the light guide plate with this diffusion portion.

  Furthermore, according to the light guide plate processing apparatus according to the present invention, before processing the light guide plate with the processing horn, the light guide plate can be securely fixed to the mounting portion by the light guide plate pressing member, Processing can be performed by bringing the processing horn into contact with the light guide plate at an accurate position.

FIG. 1 is a perspective view of a light guide plate processing apparatus 100 according to the first embodiment. FIG. 2 is a perspective view and a partially enlarged view of the light guide plate 1 according to the first embodiment. FIG. 3 is a partially enlarged perspective view of the light guide plate processing apparatus 100 according to the first embodiment. FIG. 4 is a partially enlarged cross-sectional side view of the light guide plate processing apparatus 100 according to the first embodiment. FIG. 5 is a partially enlarged cross-sectional side view showing a part of the driving state of the light guide plate processing apparatus 100 according to the first embodiment. FIG. 6 is a partially enlarged side view showing a part of the driving state of the light guide plate processing apparatus 100 according to the first embodiment. FIG. 7 is a partially enlarged perspective view showing another embodiment of the light guide plate pressing member 40 of the light guide plate processing apparatus 100 according to the first embodiment.

  Hereinafter, embodiments of the light guide plate processing apparatus 100 will be described in detail with reference to the drawings. It should be noted that the embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and do not depart from the gist of the present invention. Can be changed as appropriate. Corresponding components in the drawings are given the same or similar reference numerals. For convenience of explanation, as shown in FIG. 1, the directions orthogonal to the horizontal direction are the X axis and the Y axis, respectively, the vertical direction is the Z axis, and the position in each direction is the X coordinate, Y coordinate, This will be described as the Z coordinate. 4 to 6, a partial cross section is shown, but the cross sectional line is omitted for easy viewing.

  FIG. 1 is a perspective view of a light guide plate processing apparatus 100 according to the first embodiment. As shown in FIG. 1, the light guide plate processing apparatus 100 according to the first embodiment is guided mainly by a placement unit 10 on which the light guide plate 1 as a processing target is placed, ultrasonic processing, thermal processing, and the like. A processing horn 20 that processes the optical plate 1, a processing horn drive member 30 that drives the processing horn 20 based on processing information that is input in advance, and a light guide plate pressing member 40 that presses and fixes the light guide plate 1 to the mounting portion 10. A work table 50 on which these devices are mounted, and an operation unit 70 for inputting information for driving the light guide plate processing device 100 are provided.

  In the light guide plate 1 processed in the present embodiment, as shown in FIG. 2, the diffusion portion 2 is finally formed by the light guide plate processing apparatus 100. The light guide plate 1 before processing is a plate made of a single transparent resin. Examples of the material include methacrylic resins such as methyl methacrylate and ethyl methacrylate, acrylic resins such as methyl acrylate and ethyl acrylate, and polycarbonate. Various materials such as polyethylene can be used. The material is not particularly limited as long as it is a material having high permeability and can be melted by ultrasonic processing or heat processing. The light guide plate 1 before processing may be a plate made of a complete plane on which no pattern or other diffusing portion is formed, or may be provided with different diffusing portions in advance.

  As shown in FIG. 1, the placement unit 10 is a table on which the processed light guide plate 1 is placed. The placement unit 10 is preferably made of a plate-like hard material. More preferably, carbon steel for mechanical structure (S45C, S50C) or rolled steel for general structure (SS400) may be used as a material. The light guide plate 1 is disposed on the horizontally placed mounting portion 10, and the processing horn 20 descends vertically to process the light guide plate 1.

  As shown in FIGS. 3 and 4, the processing horn 20 is a processing mold for producing the diffusion portion 2 of the light guide plate 1, and the tip of the processing horn 20 has a shape obtained by inverting the shape to be processed as the diffusion portion 2. The processing portion 21 is formed of one or a plurality of protrusions, and the processing portion 21 at the tip of the processing horn 20 is pressed against the light guide plate 1, so that the processing horn 20 is subjected to ultrasonic vibration, heat, or the like. The light guide plate 1 at the portion in contact with the processing portion 21 is melted, and the diffusion portion 2 having a shape reversed to the processing portion 21 is formed on the light guide plate 1. The shape of the processed portion 21 is not particularly limited. As shown in FIG. 4, the processed portion 21 may be formed in a mountain shape in order to produce the dot-shaped diffusion portion 2 on the light guide plate 1. In order to form a groove-like groove, it may be formed in a ridgeline shape. The shape of the mountain shape is not particularly limited, and various shapes such as a polygonal pyramid shape such as a quadrangular pyramid shape and a triangular pyramid shape, a conical shape, a hemispherical shape, and a trapezoidal shape can be employed. In the present embodiment, a processing horn 20 having a quadrangular pyramid processing portion 21 will be described as an example.

  The processing horn 20 includes a mechanism for generating ultrasonic waves or a mechanism for heating. As a mechanism for generating ultrasonic waves, for example, there is a mechanism in which a piezo element that expands and contracts in response to the application of electricity is sandwiched in the processing horn 20 and a drive terminal and a ground terminal are provided between the piezo element and the processing horn. By applying an AC power supply to the drive terminal, the tip portion of the processing horn 20 can be vibrated at high speed. The method of heating the processing horn 20 can be achieved by attaching various heaters to the processing horn. Of course, it is not limited to these mechanisms, and various mechanisms can be adopted. The processing horn 20 may further include an air supply unit (not shown) for cooling the light guide plate 1 and the processing horn 20.

  The machining horn 20 produced in this way is connected to the machining horn drive member 30 directly or indirectly. The processing horn drive member 30 is a member that moves the processing horn 20 based on the input processing information regarding the processing method of the light guide plate 1. As shown in FIG. 1, the processing horn drive member 30 includes an X-axis rail 32 parallel to the X-axis that moves the processing horn 20 in the horizontal direction, a Y-axis rail 31 parallel to the Y-axis, and the processing horn 20 in the vertical direction. And a Z-axis rail 33 parallel to the Z-axis.

  The Y-axis rails 31 are horizontally arranged such that the pair of rails are parallel to the side of the placement unit 10 on the left and right sides of the placement unit 10, respectively. The Y-axis rail 31 has a Y-axis slide groove 31a cut in the Y-axis direction on the side surface. The X-axis rail 32 is installed on the upper surface side of the Y-axis rail 31 so as to be orthogonal to the two Y-axis rails 31, and is slidable on the Y-axis rail 31 in the Y-axis direction. Specifically, an X-axis slide member 32b that is slidably fitted along the Y-axis slide groove 31a of the Y-axis rail 31 is provided on the bottom surface in the vicinity of the X-axis rail 32. By sliding 32b on the Y-axis rail 31, the X-axis rail 32 becomes slidable in the Y-axis direction. Thereby, the processing horn 20 becomes movable in the Y-axis direction. In the X-axis rail 32, an X-axis slide groove 32a is cut on the side surface in the same direction as the X-axis direction.

  The Z-axis rail 33 is vertically installed on the X-axis rail 32 and is slidable on the X-axis rail 32. Specifically, the Z-axis rail 33 is provided with a Z-axis slide member 33b that is slidably fitted along the X-axis slide groove 32a of the X-axis rail 32. By sliding on the X-axis rail 32, it becomes possible to slide in the X-axis direction. The processing horn 20 can be moved in the X-axis direction, and the processing horn 20 can be moved to any position on the mounting portion 10 by combining with the movement in the Y-axis direction. A Z-axis slide groove 33 a is cut on the side surface of the Z-axis rail 33 in the same direction as the axial direction of the Z-axis rail 33.

  The processing horn 20 is formed to be slidable on the Z-axis rail 33. Specifically, an up-and-down machining horn drive member 20 a that moves up and down is slidably fitted along the Z-axis slide groove 33 a of the Z-axis rail 33 between the machining horn 20 and the Z-axis rail 33. The upper and lower machining horn drive member 20a slides on the Z-axis rail 33 so that the machining horn 20 can slide in the Z-axis direction, that is, the vertical direction. Thereby, the processing horn 20 can contact or press the light guide plate 1.

  Each of the X-axis slide member 32b, the Z-axis slide member 33b, and the upper / lower machining horn drive member 20a includes a moving mechanism that can move based on machining information described later. The moving mechanism is not particularly limited, and can be selected from known moving means.

  As shown in FIGS. 3 and 4, the light guide plate pressing member 40 is attached near the periphery of the processing horn 20, and presses the light guide plate 1 against the mounting portion 10 immediately before the processing horn 20 processes the light guide plate 1. And has the function of fixing. The light guide plate pressing member 40 mainly includes a pressing portion 41 that presses the light guide plate 1, a light guide plate pressing member slide portion 42 that is slidably fixed to the upper and lower processing horn drive member 20 a, and the light guide plate pressing member 40 downward. And an urging member 44 for urging the urine.

  The pressing portion 41 is formed when the pressing portion 41 abuts the light guide plate 1 with a metal flat plate 41b in which a rectangular through-hole 43 is formed so that the tip of the processing horn 20 can be disposed at the center of the rectangular plane. For example, rubber, urethane, silicon, or the like is used as the material of the buffer material to which the buffer material 41a made of a flexible material provided on the bottom surface of the flat plate 41b is attached. The light guide plate pressing member slide part 42 is formed so as to stand upward from one end of the pressing part 41, and is formed to be slidable in the vertical direction with a part of the upper and lower processing horn drive member 20a. Specifically, a vertical groove 20b is cut in a vertical direction below the upper and lower machining horn drive member 20a, and a light guide plate pressing member slide portion 42 is slidably attached to the vertical groove 20b. The urging member 44 is made of a spring, elastic rubber, elastomer or the like, and is a member for urging the pressing portion 41 downward. In the first embodiment, a coil spring is disposed between the protruding portion 42a that protrudes horizontally from the light guide plate pressing member slide portion 42 and the vertical processing horn drive member 20a, and the lower surface of the light guide plate pressing member 40 is the processing horn 20. It is urged so that it may be arranged below the tip.

  As shown in FIG. 1, the work table 50 is a table for mounting members constituting the light guide plate processing apparatus 100, and has a box shape having a two-stage configuration of an upper plate 51 and a lower plate 52. A mounting portion 10, a processing horn 20, and a processing horn drive member 30 are attached to the upper plate 51 of the work table 50. A vacuum pump 60, an ultrasonic oscillator 61, and the like are mounted on the lower plate 52 of the work table 50.

  The operation unit 70 is a member for the user to input information based on the processing method of the light guide plate processing apparatus 100, and to control the driving of the processing horn 20 and the processing horn drive member 30 based on the input information. It is composed of a touch panel monitor and a control circuit (not shown). Information for controlling the processing horn 20 and the processing horn drive member 30 includes information on the position, depth, shape, and the like of lines or dots constituting the diffusing unit 2. The information for controlling the processing horn drive member 30 input in the operation unit 70 is supplied to the processing horn drive member 30, and the processing horn drive member 30 to which the information is supplied moves the processing horn 20 by a method described later. Let The operation unit 70 may include a connection unit such as an interface so that the operation unit 70 can be connected to an information processing apparatus such as a computer. In this case, the light guide plate processing apparatus 100 can be operated using a predetermined application installed in the computer.

  Next, a driving method of the light guide plate processing apparatus 100 manufactured as described above and a processing method of the light guide plate 1 will be described in detail.

  First, the light guide plate 1 to be processed is fixed to the placement unit 10. In order to fix the light guide plate 1 to the mounting portion 10, as shown in FIG. 1, the positioning plate 90a that determines the position in the X-axis direction fixed to the mounting portion 10 and the position in the Y-axis direction are determined. The light guide plate 1 is disposed along the positioning plate 90b to be moved toward the positioning plates 90a and 90b via the light guide plate pressing plate 91a for pressing the X-axis direction and the light guide plate pressing member 91b for pressing the Y-axis direction, respectively. After strongly pressing the light guide plate 1 to the positioning plate 90, the light guide plate 1 and the light guide plate holding plate 91 are fixed by the fixing magnets 92a and 92b. Thereby, the position of the light guide plate 1 in the X-axis direction and the Y-axis direction is positioned. In this way, the light guide plate 1 is fixed to the placement unit 10. At this stage, when the light guide plate 1 is warped or curved, the light guide plate 1 is not necessarily in close contact with the mounting portion 10.

  Next, based on a command from the operation unit 70, the X-axis rail 32 moves on the Y-axis rail 31 in the Y-axis direction, so that the processing horn 20 is moved to the designated Y coordinate position. Further, when the Z-axis rail 33 moves on the X-axis rail 32 in the X-axis direction, the machining horn 20 is moved to the designated X-coordinate position. In this way, the processing horn 20 is disposed above the position where the processing of the light guide plate 1 is scheduled.

  And the up-and-down process horn drive member 20a is moved to the perpendicular downward direction using the air cylinder which is not shown connected with the compressor which is not shown. Until the light guide plate 1 comes into contact, the processing horn 20 and the light guide plate pressing member 40 are simultaneously lowered as the vertical processing horn drive member 20a is lowered. Then, as shown in FIG. 5, the pressing portion 41 positioned below the tip of the processing horn 20 comes into contact with the light guide plate 1 first, and the light guide plate 1 is pressed and fixed to the mounting portion 10 as it is. . Thus, even when the light guide plate 1 is warped or the light guide plate 1 is floating from the placement unit 10, the light guide plate 1 can be brought into close contact with the placement unit 10. When the vertical processing horn drive member 20a is further lowered from this state, as shown in FIG. 6, the light guide plate pressing member 40 causes the light guide plate pressing member slide portion 42 to slide upward on the vertical processing horn drive member 20a. Thus, even when the upper and lower processing horn driving member 20a is excessively lowered for the light guide plate pressing member 40, the light guide plate 1 is kept pressed without being further lowered. On the other hand, the processing horn 20 continues to descend until it contacts the light guide plate 1. And if it detects that the processing horn 20 contacted the light-guide plate 1, the diffusion part 2 which consists of the process part 21 which the light-guide plate 1 was fuse | melted by the process part 21 of the process horn 20 and the recessed part of the inverted shape will be light-guide plate. 1 is formed.

  At this time, in order to detect that the processing horn 20 is in contact with the light guide plate 1, the light guide plate processing apparatus 1 according to the present embodiment slides the processing horn 20 on the Z-axis rail 33 as shown in FIG. 6. It may be provided with a contact 80 that can be attached and can detect a contact of the tip of the processing horn 20 with the surface of the light guide plate 1 and extract a signal that gives vibration to the piezoelectric element. When the processing horn 20 starts to move downward based on the processing information input via the operation unit 70, the tip of the processing horn 20 first contacts the surface of the light guide plate 1 and the descending of the processing horn 20 stops. It will be. Furthermore, since the lowering of the machining horn 20 is stopped when the vertical machining horn drive member 20a continues to descend, the contact 80A synchronized with the movement of the machining horn 20 and the vertical machining horn drive member 20a are synchronized. It is separated from the contact 80B, and energization is released. Based on this de-energization signal, the piezoelectric element generates mechanical vibration energy according to the current value of the drive signal. The mechanical vibration energy generated here is amplified by a cone portion (not shown) provided inside the processing horn 20. Mechanical vibration energy amplified by a cone portion (not shown) is transmitted to the processing portion 21 by the processing horn 20. In addition, the measurement means such as a timer is operated simultaneously with the start of the generation of mechanical vibration energy by the piezoelectric element, and the generation of the mechanical vibration energy is stopped after a desired time has elapsed, thereby reducing the vibration time of the tip of the processing horn 20. Can be controlled.

  When the processing of the diffusing unit 2 is completed, the processing horn 20 and the light guide plate pressing member 40 are returned to their initial positions, and then the processing horn 20 is moved to another processing site to process the diffusing unit 2.

  Thus, according to the light guide plate processing apparatus 100 according to the present invention, the light guide plate 1 can be fixed by the light guide plate pressing member 40 immediately before the diffusion portion 2 of the light guide plate 1 is processed by the processing horn 20. Therefore, even when the light guide plate 1 is along or curved and floats from the placement unit 10, the light guide plate 1 can be processed in a state of being in close contact with the placement unit 10. it can. Since the light guide plate 1 is floating, it is possible to prevent a possibility that the light guide plate 1 is processed in a place other than an accurate position. Further, if the light guide plate 1 is warped or curved, the processing horn 20 is not press-fitted uniformly into the light guide plate 1 and the diffusion portion 2 cannot be processed into the intended shape, or the depth of the diffusion portion 2 is positioned. Depending on the situation, it may become irregular. However, since the light guide plate 1 is brought into close contact with the placement portion 10 by pressing the light guide plate 1 against the placement portion 10, the processing portion 21 is pressed in parallel to the light guide plate 1, and all the diffusion portions 2 are It can process uniformly according to the shape of the processing part 21 of the processing horn 20.

  In this way, as shown in FIG. 2, a light guide plate 1 having a diffusion portion 2 composed of a plurality of recesses formed on the surface is produced. According to the light guide plate 1, the light introduced into the light guide plate 1 can be effectively diffused by the diffusion portion 2.

  In addition, this invention is not limited to each embodiment mentioned above, and it cannot be overemphasized that it can implement with a various aspect, as long as it belongs to the technical scope of this invention.

  The light guide plate processing apparatus according to the present embodiment may further include a mechanism for fixing the light guide plate 1. For example, as shown in FIG. 1, you may add the mechanism which fixes the light-guide plate 1 to the mounting part 10 by reducing the air pressure inside the hole 11 using a vacuum pump.

  Further, in the light guide plate processing apparatus according to the present embodiment, the light guide plate pressing member 40 is disposed around the entire processing horn 20, but as shown in FIG. May be arranged only in part, or in some other parts.

  As shown in the above-described embodiment, it can be used as a light guide plate processing apparatus and a light guide plate.

DESCRIPTION OF SYMBOLS 10 ... Mounting part, 20 ... Processing horn, 20a ... Up-and-down processing horn drive member,
20b ... vertical groove, 21 ... processing part, 30 ... processing horn drive member,
31 ... Y-axis rail, 31a ... Y-axis slide groove, 32 ... X-axis rail,
32a ... X-axis slide groove, 32b ... X-axis slide member, 33 ... Z-axis rail,
33a ... Z-axis slide groove, 33b ... Z-axis slide member,
40 ... light guide plate pressing member, 41 ... pressing portion, 41a ... through hole,
41b ... Planar plate, 42 ... Light guide plate pressing member slide part, 42a ... Projection part,
43 ... cushioning material, 44 ... biasing member, 50 ... work table, 51 ... upper plate,
52 ... Lower plate, 60 ... Vacuum pump, 70 ... Operation part, 80 ... Contact,
80B ... Contact, 80A ... Contact, 90a, 90b ... Position plate,
91a, 91b ... light guide plate pressing plate, 92a, 92b ... fixing magnet 100 ... light guide plate processing apparatus

Claims (8)

In a processing apparatus for processing a concave diffusion portion on a light guide plate,
A processing horn formed with a processing part for forming a diffusion part of the light guide plate;
A machining horn drive member for freely moving the machining horn directly or indirectly connected;
A placement section on which the light guide plate is placed;
A light guide plate pressing member disposed on at least a part of the periphery of the processing horn;
With
The light guide plate pressing member presses the light guide plate against the mounting portion before the processing horn contacts and processes the light guide plate.   The light guide plate pressing member is directly or indirectly connected to a machining horn drive member that moves the machining horn up and down, and moves up and down as the machining horn drive member moves up and down. Item 4. The light guide plate processing apparatus according to Item 1.   The light guide plate pressing member is fixed to be slidable in the vertical direction with respect to the processing horn driving member so that the pressing amount of the light guiding plate pressing member can be adjusted when the processing horn driving member descends excessively. The light guide plate processing apparatus according to claim 1, wherein the light guide plate processing apparatus is provided.   The light guide plate processing apparatus according to any one of claims 1 to 3, wherein an elastic member is provided between the light guide plate pressing member and the processing horn drive member.   The light guide plate processing apparatus according to claim 4, wherein the elastic member is a spring.   The light guide plate processing apparatus according to claim 1, wherein the light guide plate pressing member is disposed so as to surround the entire circumference of the processing horn.   The light guide plate processing apparatus according to any one of claims 1 to 6, wherein a cushioning material such as urethane, rubber, or the like is disposed on a bottom surface of the light guide plate pressing member. A light guide plate processed by the light guide plate processing apparatus according to claim 1.

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