JP5383091B2 - Display unit - Google Patents

Description

  The present invention relates to a display unit that is mounted on an electronic device such as an electronic still camera and used to display an image.

  A liquid crystal display unit used for a monitor screen of a conventional electronic still camera includes a backlight type liquid crystal unit using a liquid crystal cell.

  In such a liquid crystal unit, a liquid crystal cell, which is an image display member configured using a glass substrate, is interposed between a pair of upper and lower bezels made of metal and formed in a frame shape, using a glass substrate and a back. It is usual to adopt a structure in which various members for light are held in a stacked manner.

  In general, the glass substrate used in the liquid crystal cell has a large dimensional tolerance because it involves a scribe and break operation that breaks along the groove grooved by a cutter. Unevenness is made. However, since a hole for positioning cannot be formed in the glass substrate of the liquid crystal cell, the outer peripheral portion of the glass substrate having a large variation in the dimensional accuracy of the outer shape must be used for positioning. For this reason, it is very difficult to position the glass, and the display position at the time of completion of the liquid crystal unit increases, resulting in poor appearance.

Therefore, in the conventional liquid crystal unit, a method for positioning and holding the liquid crystal cell by pressing a plurality of positioning protrusions provided so as to protrude into the frame of the resin spacer against the glass substrate of the liquid crystal cell is proposed. Has been. (For example, see Patent Document 1)
JP 2007-193262 A (page 7, FIG. 4)

  However, in the conventional method, the assembly accuracy of the liquid crystal unit attached to the liquid crystal window portion of the electronic still camera body is lowered. Therefore, when the conventional method is used, the position of the liquid crystal window for image display of the camera main body and the display area of the image display member in the liquid crystal unit are shifted and shifted, and the appearance is often impaired.

  Therefore, when using this conventional method, in order to suppress the displacement of the liquid crystal display portion and the displacement of the rotation direction, in the plurality of protrusions that are protruded by adjusting the height in the frame of the resin spacer, It was necessary to configure the liquid crystal cell so as to be kept lightly pressed.

  In addition, in the liquid crystal unit, the glass substrate itself of the liquid crystal cell, which is a member composed of a glass substrate for thinning, is required to be thin, and the glass thickness constituting the liquid crystal cell tends to be thin. Thus, in the liquid crystal cell in which the glass thickness is reduced, burrs and microcracks are easily generated in the outer peripheral portion (the portion where the cutter enters) which is a cut portion of the glass in the manufacturing step of cutting the thin glass in the manufacturing step. For this reason, when the liquid crystal cell is attached to the resin spacer, if the protrusion of the resin spacer rubs the outer periphery of the glass substrate where burrs or microcracks have occurred, the burrs will be scraped and the glass will be chipped or cracked. Easy to do.

  When the burr generated by cutting the glass portion in this way enters the backlight surface, the liquid crystal unit causes a display defect due to foreign matter mixing, resulting in a defective product. Furthermore, when a liquid crystal cell with burrs in the cut portion of the glass substrate is press-fitted into a plurality of protrusions protruding from the resin spacer frame, the liquid crystal cell is broken by the pressing force of the protrusions. Product yield was poor.

  In addition, in the configuration in which the liquid crystal cell or the like is positioned and held via a resin spacer between a pair of bezels formed in a frame shape, the protruding portion of the spacer enters the chipped portion of the glass substrate of the liquid crystal cell. May be assembled.

  In such a case, the displacement in the rotational direction becomes large between the spacer and the liquid crystal cell. Therefore, in order to suppress this, in this liquid crystal unit, it is necessary to set a somewhat larger number of protrusions provided on the spacer. However, in this liquid crystal unit, if the number of protrusions projecting on the spacer is increased, the chances of breakage due to climbing or stressing on the burr portion of the glass substrate increase, resulting in poor product yield. was there.

  Further, when the number of protrusions protruding from the spacer is increased, there is a problem that a possibility that a small piece of glass generated when the protrusions and the glass surface are rubbed enters the display area is increased.

  An object of the present invention is to position an image display member formed of a glass substrate with a protrusion provided on a holding member, thereby improving the assembly position accuracy of the image display member and improving the appearance. Further, it is possible to suppress the protrusions provided on the holding member from pressing the burrs formed on the end surface of the image display member formed of the glass substrate and causing glass breakage. In addition, an object of the present invention is to provide a display unit capable of suppressing the glass fragments generated by breaking the glass from entering the display area.

The display unit of the present invention includes an image display member configured using a glass substrate, a holding member formed in a frame shape that holds the image display member, and a casing that covers the holding member so as to surround from the outside. A display unit comprising: a lower bezel configured in a shape; and an upper bezel that is incorporated outside the lower bezel so as to sandwich the holding member between the lower bezel and the holding member is the image display member a guide side portion to the side portions in contact with positioning and holding the image display member, and the front Symbol guide side portion and the elastic arm portion at a portion of the edges formed on the cantilever facing the resilient arm from parts, the protrusion protruding to pair toward the image display member and the to the direction in which the protrusion is protruded pressed convex portion projecting from the elastic arm in the opposite direction If has, the lower In a state before the upper bezel is assembled to the zel, the protrusion is provided with a gap between the image display member, and the pressed protrusion is formed from an opening formed on a side of the lower bezel. is a protruded state, by Komu set the on bezel to the lower bezel, press the pressed convex portion wherein the bezel protrudes from the opening formed on the side of the lower bezel, the elastic arm part elastically pressed against the image display member said projecting portion while elastically deforming the, characterized in that for retaining the image display member in the previous SL guide edge portion pressed against the resiliently.

According to the present invention, when the upper bezel is assembled to the lower bezel, the protrusions disposed on the holding member are operated by the upper bezel, and the image display member formed of the glass substrate is elastically pressed for positioning. Do. Thereby, the mounting position accuracy of the image display member with respect to the holding member can be improved, and the appearance can be improved. Furthermore, in the assembly process, when the image display member is placed on the holding member, the gap is set so that the protrusions arranged on the holding member side are separated from the image display member. There is no need to press-fit the member into the protrusion. Therefore, it can suppress that a projection part presses the burr | flash formed on the end surface of the image display member comprised with the glass substrate, and produces a glass crack, and can improve the yield of a product. In addition, there is an effect that it is possible to prevent the glass fragments generated by the glass from being broken when the protruding portion is pressed to be mixed into the display area.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an enlarged view of the main part of the liquid crystal unit according to the embodiment of the display unit of the present invention.

  FIG. 2 is an exploded perspective view of the liquid crystal unit according to the embodiment of the present invention.

  FIG. 3 is a perspective view of an electronic still camera including the liquid crystal unit according to the embodiment of the present invention.

  FIG. 4 is a perspective view showing the liquid crystal unit according to the embodiment of the present invention.

  As shown in FIG. 3, the liquid crystal unit according to the present embodiment is particularly suitable for use with a small and thin electronic still camera T equipped with a large LCD monitor.

  As shown in FIG. 2, the liquid crystal unit main body U includes a liquid crystal cell 1 that is an image display member formed of a glass substrate, a resin spacer 2 that is a holding member, an upper bezel 3, a lower bezel 4, a plurality of sheets, and a light. A guide 5 is provided.

  The backlight installed in the liquid crystal unit main body U includes a flexible substrate 10 in which a light guide 5, a reflection sheet 6, a diffusion sheet 7, lens sheets 8 and 9, and a plurality of mounting type LEDs are arranged. The backlight is held by the resin spacer 2 as a holding member and is accommodated in the liquid crystal unit body U.

  This backlight emits light using a plurality of LEDs mounted on the flexible substrate 10 as light sources. In this backlight, light emitted from the LED is guided into the display area by the light guide 5, adjusted to uniform light by the diffusion sheet 7, condensed by the two lens sheets 8 and 9, and transmitted. The liquid crystal cell 1 is lighted up from the back.

  In the liquid crystal unit main body U, the liquid crystal cell 1, which is an image display member held by the resin spacer 2 which is a holding member, the light guide 5, various sheets, and the like are disposed between the upper bezel 3 and the lower bezel 4. It is integrated in a state of being enclosed and sandwiched. Therefore, as shown on one side in FIGS. 2 and 3, the upper bezel 3 is formed with narrow side end portions 30 bent up at right angles from predetermined locations on the four sides of the rectangular flat frame. To do. Further, the lower bezel 4 includes a vertical side portion that is bent at a right angle from a predetermined portion on both vertical sides of the rectangular flat frame, and a horizontal side that is bent at a right angle from both horizontal sides. Forming part.

  In addition, hooking holes 3a and 3b are formed in a total of four places on the narrow side end portions 30 at the four corners of the upper bezel 3. Correspondingly, hooking projections 4a and 4b that are respectively engaged with hooking holes 3a and 3b are provided on the horizontal and vertical sides of the lower bezel 4 at the same corners. . Then, the upper bezel 3 and the lower bezel 4 are integrated by an assembling operation so as to overlap each other. In the assembly process of the upper bezel 3 and the lower bezel 4, hooking protrusions 4 a and 4 b are engaged with the hooking holes 3 a and 3 b so as to be integrated with one touch and assembled into a completed state shown in FIG. 4. . That is, the integrated upper bezel 3 and lower bezel 4 have a rectangular frame shape when viewed from the front, and are configured in a casing shape that covers each side so as to surround the outer surface of the resin spacer 2.

  The upper bezel 3 and the lower bezel 4 configured as described above are integrally held by covering and sandwiching the resin spacer 2, the light guide 5, and the like so as to surround them from the outside. .

  FIG. 4 is a perspective view showing a completed state of a liquid crystal unit which is a display unit.

  Next, the liquid crystal cell 1, which is an image display member formed of a glass substrate, can be positioned and held at an appropriate position so that the glass is not damaged by a small number of protrusions provided on the resin spacer 2. The liquid crystal unit will be described.

  The resin spacer 2 which is a holding member for configuring this liquid crystal unit is configured as shown in FIG. FIG. 5 is a front view of the resin spacer used in the liquid crystal unit according to the embodiment of the present invention, taken from the surface side where the liquid crystal cell is attached.

  The resin spacer 2 as the holding member is formed in a rectangular frame shape that is long horizontally. In this resin spacer 2, the liquid crystal cell 1 is positioned and held at two predetermined positions from the middle to the upper corner on one vertical side in the short direction (the vertical side on the left side in FIG. 5). Are arranged. At the same time, the resin spacer 2 which is a holding member is provided with two pressings for positioning and holding the liquid crystal cell 1 near both end portions on one long side in the longitudinal direction (shown in the figure is the bottom side). Place the force section.

  The pressing biasing portion provided on one long side in the longitudinal direction is formed on the upper side of the resin spacer 2 that is a holding member that does not bear the weight of the liquid crystal cell 1 when the liquid crystal cell 1 that is an actual image display member is used. You may arrange.

  As shown in FIGS. 1, 9, 7, and 8, the resin spacer 2 is formed of a resin material such as plastic that is rich in elasticity in order to form a pressing biasing portion. In order to constitute this pressing urging portion, elastic arm portions 20a, 20b, 20c, and 20d formed in a cantilever shape extending along the longitudinal direction of one side are provided at each predetermined portion of the frame of the resin spacer 2. Form.

  Protrusions 12a, 12b, 12c, and 12d, which are heads projecting in a semi-cylindrical shape into the frame of the resin spacer 2, project from the free ends of the elastic arms 20a, 20b, 20c, and 20d. . The ridge line portions of the protrusions 12a, 12b, 12c, and 12d are formed in a large cross-sectional arc shape so that the corners are rounded.

  In the natural state where the external force before the resin spacer 2 is incorporated into the upper bezel 3 does not act on the pressing urging portion, a predetermined interval is provided between the arc surface of the protrusions 12a to 12d and the outer peripheral surface of the liquid crystal cell 1. Assembling play that is the gaps 11a to 11d is provided.

  This assembling play is for forming a gap for preventing interference between the outer peripheral portion of the liquid crystal cell 1 and the protrusions 12a to 12d when the liquid crystal cell 1 is assembled into the resin spacer 2.

  In addition, pressed projections 14a, 14b, 14c, and 14d that are small protrusion-like ribs are provided at predetermined positions between the free ends and the base ends of the elastic arm portions 20a, 20b, 20c, and 20d. To do. The pressed protrusions 14a, 14b, 14c, and 14d are configured to protrude a predetermined distance from the outer surface of the frame of the resin spacer 2 toward the outside. Each of the pressed convex portions 14a, 14b, 14c, and 14d is provided with a tapered surface 15a in which a portion facing the upper bezel 3 is formed as an inclined surface that is inclined from the proximal end side toward the distal end side. The tapered surface 15a is elastically deformed so that the edge of the upper bezel 3 slides on the tapered surface 15a and the pressed convex portions 14a, 14b, 14c, and 14d are pushed into the inside of the resin spacer 2. It is for guiding.

  At the same time, the ridge line portions of the pressed convex portions 14a, 14b, 14c, and 14d are formed in a large cross-sectional arc shape so as to round the corners.

  In addition, you may arrange | position the to-be-pressed convex parts 14a-14d provided in the elastic arm parts 20a-20d in the position vicinity on the opposite side to the projection parts 12a-12d.

  In the resin spacer 2 as the holding member, the inner side surface portion facing the inside of the opening of each side facing each side where the pressing urging portion is arranged is brought into contact with the side side portion of the liquid crystal cell 1 in a plane. It is configured as a guide side for positioning and holding.

  Next, an assembly process of the liquid crystal unit main body U using the resin spacer 2 provided with the pressing urging portion will be described.

  In assembling the liquid crystal unit main body U, the liquid crystal cell 1 temporarily attached to the resin spacer 2 and the light guide 5 shown in FIG. The light guide 5 is formed by integrating a flexible substrate 10 in which a plurality of reflective LEDs 6, diffusion sheets 7, lens sheets 8 and 9, and a plurality of mounting type LEDs are arranged.

  As shown in FIG. 5, in the vertical side portion of the lower bezel 4 to which the resin spacer 2 is assembled, the pressed protrusions 14 a and 14 b having small protrusions protrude through the openings 22. Further, since there is no narrow side plate that bends and rises from the lower bezel 4 at the bottom side, which is the lateral side of the lower bezel 4, the small protruding base-like pressed convex portions 14c and 14d of the resin spacer 2 respectively The bezel 4 protrudes outward from the bottom side, which is the lateral side.

  As shown in FIGS. 1 and 5, in the state where the resin spacer 2 is incorporated in the lower bezel 4, the liquid crystal cell 1 is contained in the frame of the resin spacer 2, but is not fixed by the pressing biasing portion. It is in the retention state. That is, in this temporary holding state, the elastic arm portions 20a, 20b, 20c, and 20d that are the pressing urging portions of the resin spacer 2 are in a natural state that is not elastically deformed, and the protrusions 12a to 12d are liquid crystal. It is in a state of being separated from the cell 1. Therefore, in this temporary holding state, the liquid crystal cell 1 is set in a state where it is placed with play that is slightly movable within the frame of the resin spacer 2.

  Further, in the work process of incorporating the liquid crystal cell 1 into the resin spacer 2, the liquid crystal cell 1 is inserted into the space in the frame of the resin spacer 2 where play is set. That is, the liquid crystal cell 1 is inserted with a gap between the outer periphery of the liquid crystal cell 1 and each of the protrusions 12a to 12d. Therefore, it can suppress that protrusion part 12a-12d hooks and breaks the burr | flash of the glass substrate which comprises the liquid crystal cell 1, or lacks a glass end surface or scrapes off a glass piece by rubbing a glass end surface.

  Next, a process of completing the liquid crystal unit main body U by assembling the upper bezel 3 into the state in which the liquid crystal cell 1 is incorporated into the lower bezel 4 via the resin spacer 2 and the light guide 5 is incorporated. .

  In the process of assembling the upper bezel 3, as shown in FIG. 10, the upper bezel 3 is fitted and integrated with the lower bezel 4 in which the liquid crystal cell 1 is incorporated via the resin spacer 2. In this step, the liquid crystal cell 1 is positioned and fixed by the pressing biasing portion of the resin spacer 2 in accordance with the operation of fitting the upper bezel 3 together.

  That is, in this operation, the tip inner side surface portion of the narrow side end portion 30 raised from the outer periphery of the upper bezel 3 at a right angle is pressed convex portions 14a, 14b, 14c, It slides on each tapered surface 15a of 14d.

  Then, as shown in FIGS. 7 and 8, the pressed convex portions 14 a, 14 b, 14 c, and 14 d of the pressing urging portion are pushed toward the inside of the frame of the resin spacer 2. As a result, the elastic arm portions 20a, 20b, 20c, and 20d of the pressing urging portion are elastically deformed from the base end portion, and the protruding portions 12a, 12b, 12c, and 12d elastically press the outer peripheral end portion of the liquid crystal cell 1. To do.

  Accordingly, the liquid crystal cell 1 placed in the frame of the rectangular frame-shaped resin spacer 2 is urged by the protrusions 12a and 12b of the pressing urging portion disposed on the vertical side surface portion of the resin spacer 2 to face each other. It is press-contacted to the side surface, and is positioned and held. At the same time, the liquid crystal cell 1 placed in the frame of the resin spacer 2 is biased by the protrusions 12c and 12d of the pressing biasing portion disposed on the lateral side portion of the resin spacer 2 and faces the lateral side portion. Is held in position by being pressed against each other. In other words, the liquid crystal cell 1 is simultaneously pressed against the vertical and horizontal sides of the rectangular frame-shaped resin spacer 2 and is positioned and held.

  In the pressing urging portion that operates in this way, the protrusions 12a to 12d are disposed by placing the pressed convex portions 14a, 14b, 14c, and 14d closer to the base end portion that is the rotation center of the elastic arm portions 20a to 20d. The amount of movement can be increased. Further, the movement amount of the protrusions 12a to 12d is also related to the protrusion height of the pressed protrusions 14a to 14d. Therefore, the amount of movement of the protrusions 12a to 12d of the pressing biasing portion is a required amount depending on the positions of the pressed convex portions 14a to 14d in the elastic arm portions 20a to 20d and the protruding heights of the pressed convex portions 14a to 14d. Can be adjusted.

  Further, in this pressing urging portion, the urging force when the projecting portions 12a to 12d press the liquid crystal cell 1 is sufficient to cause the liquid crystal cell 1 to be aligned and held, and the glass substrate of the liquid crystal cell 1 Set to a range that will not cause damage.

  In this pressing urging portion, the urging force when the projections 12a to 12d press the liquid crystal cell 1 is appropriately set according to the cross-sectional area and material of the elastic arm portions 20a to 20d, the arrangement of the pressed convex portions 14a to 14d, and the like. To do. As shown in FIG. 9, for example, when the liquid crystal cell 1 having a glass substrate close to the maximum allowable size enters the resin spacer 2, the elastic urging portion 20 a is elastically deformed in the pressing urging portion. Absorbs increased stress. Therefore, it can suppress that the projection parts 12a-12d give a strong stress to the glass substrate edge part of the liquid crystal cell 1, and induce a crack. Moreover, in this press biasing part, it can avoid that a display defect arises with the stress when the protrusion parts 12a-12d press-contact with the liquid crystal cell 1. FIG.

  Further, in this pressing biasing portion, the reaction force when the projections 12a to 12d press the liquid crystal cell 1 and the reaction force when elastically deforming the elastic arm portions 20a to 20d are increased via the pressed convex portions 14a to 14d. It acts on the narrow side end 30 of the bezel 3. At this time, in this press urging portion, the elastic arm portions 20a to 20d are elastically deformed to prevent excessive stress from acting. Therefore, in this pressing urging portion, it is possible to prevent the pressed convex portions 14a to 14d from pushing the narrow side end 30 of the upper bezel 3 and bulging outward, so that the narrow side end 30 swells and surrounds the LCD. Interference with parts can be suppressed.

  Moreover, in this press urging portion, by setting a large amount of movement of the protrusions 12a to 12d, for example, when there is a recess due to a chip at the end of the glass substrate of the liquid crystal cell 1, the protrusions 12a to 12d are recessed. Can reach the bottom of the door and press properly. Furthermore, even if the entire glass substrate is formed to be small, the protrusions 12a to 12d can be moved greatly and pressed appropriately. Therefore, in the resin spacer 2 provided with the pressing urging portion, it is possible to prevent the positioning accuracy from being affected by the recess or size of the glass substrate of the liquid crystal cell 1.

  In the above-described embodiment, the configuration in which the liquid crystal cell 1 is positioned by the protrusions 12a to 12d of the four pressing urging units in total has been described. However, the positioning is performed by using four or less pressing urging units. You may comprise as follows.

  The present invention is not limited to the above-described embodiment, and it is needless to say that other various configurations can be adopted without departing from the gist of the present invention.

It is a principal part enlarged view which takes out and shows the principal part in the liquid crystal unit concerning embodiment of the display unit of this invention. It is a disassembled perspective view of the liquid crystal unit concerning embodiment of this invention. It is a perspective view of an electronic still camera provided with a liquid crystal unit concerning an embodiment of the invention. It is a perspective view which takes out and shows the liquid crystal unit concerning embodiment of this invention. It is a front view which takes out and shows the resin spacer concerning embodiment of this invention. It is a front view which shows the positional relationship of the resin spacer and liquid crystal cell concerning embodiment of this invention. It is an enlarged front view which shows the press urging | biasing part part of the vertical side in the state which temporarily suspended the liquid crystal cell in the lower bezel concerning embodiment of this invention. It is an enlarged front view which shows the press urging | biasing part part of the base in the state which temporarily suspended the liquid crystal cell in the lower bezel concerning embodiment of this invention. It is an enlarged front view which shows the press biasing part part of the vertical side in the state which fitted the upper bezel to the lower bezel concerning embodiment of this invention. It is an expansion disassembled perspective view which shows the press urging | biasing part part of the vertical side in the state when fitting an upper bezel to the lower bezel concerning embodiment of this invention.

Explanation of symbols

1 Liquid crystal cell 1
2 Resin spacer 3 Upper bezel 4 Lower bezel 5 Light guide 6 Reflective sheet 7 Diffusion sheet 8 Lens sheet 1
9 Lens sheet 2

Claims (3)

An image display member configured using a glass substrate;
A holding member formed in a frame shape for holding the image display member;
A lower bezel configured in a casing shape so as to surround the holding member from the outside;
An upper bezel incorporated outside the lower bezel so as to sandwich the holding member between the lower bezel and the display unit,
The holding member is
A guide side part that positions and holds the image display member in contact with a side part of the image display member;
A resilient arm formed on the cantilever to a portion of the prior SL guide side portion and opposite sides,
From the elastic arm portion, and a protruding portion that protrudes to pair toward the image display member,
A pressed protrusion protruding from the elastic arm in a direction opposite to the direction in which the protrusion protrudes,
In a state before the upper bezel is assembled to the lower bezel, a gap is provided between the protrusion and the image display member, and the pressed convex portion is formed on a side portion of the lower bezel. It is in a state protruding from the opening,
By Komu set the on bezel to the lower bezel,
The upper bezel pushes the pressed convex portion protruding from the opening formed on the side portion of the lower bezel, and elastically deforms the elastic arm portion while elastically deforming the protrusion on the image display member. pressing, the display unit, characterized in that for retaining the image display member in a pre-Symbol pressed against elastically to the guide sides. The display unit according to claim 1 , wherein the pressed convex portion is disposed on a proximal end side of the elastic arm portion with respect to the protruding portion . Wherein the pressed protrusions, according to claim 1 or 2, characterized in that a tapered surface formed on the inclined surface to diagonally toward the tip end side portion facing the upper bezel from the base end side Display unit.

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