JP7254221B2 - display device - Google Patents

Description

The present invention relates to a display device having a metal member and a rear cabinet attached to the rear side of the metal member.

In display devices such as flat-panel televisions, it is common to fix the rear cabinet to a chassis (a metal frame on which circuit boards and other electronic components are mounted) with screws. That is, screws are fastened from the rear side of the display device, and the rear cabinet is fixed to the chassis with these screws.

In recent years, flat-panel televisions have become larger, and along with this, cabinets, which are exterior features, have also become larger. Therefore, when fixing the rear cabinet to a chassis or the like with screws, a large number of screws are used due to the problem of strength and the problem of warping of the cabinet due to thermal expansion. However, in the conventional structure in which screws are fastened from the back side of the display device, many screws are exposed on the back side of the device, which impairs the appearance of the device.

On the other hand, Patent Literature 1 discloses a structure for fixing the rear cabinet without using screws. That is, the display device disclosed in Patent Document 1 has a configuration in which the rear cabinet is fixed by inserting a band plate-shaped edge plate provided on the peripheral frame portion of the rear cabinet into the peripheral frame portion of the front cabinet.

JP 2011-109506 A

However, the conventional configuration disclosed in Patent Document 1 does not consider deformation due to thermal expansion of members. Not a compatible configuration.

For example, if the cabinet fixing method in Patent Document 1 is applied to the case of fixing a rear cabinet (usually a resin member) to a chassis (usually a metal member), the cabinet may be warped or the members may be damaged. There is also a possibility that damage may occur. This is because the rear cabinet and the chassis, which are made of different materials, have a large difference in deformation due to thermal expansion (which may be 4 to 5 mm in a large display device).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device that can reduce the number of screws exposed to the rear surface of the device when the rear cabinet is fixed to a metal member and that can cope with thermal expansion. With the goal.

In order to solve the above problems, the present invention provides a display device having a metal member and a rear cabinet which is a resin member attached to the rear side of the metal member, wherein one of the metal member and the rear cabinet An engaging member having two engaging arms facing each other is attached to the first member which is is provided with an engaging protrusion that engages so as to be sandwiched between the two engaging arms of the engaging member so as to be slidable in the first direction with respect to the first member. and the engaging protrusion engaged with the engaging arm of the engaging member slides on the engaging arm in a second direction perpendicular to the first direction. characterized by being possible.

According to the above configuration, the rear cabinet can be attached to the metal member and fixed by engaging the engagement protrusion of the second member with the engagement arm of the first member. can. In this fixing method, compared to the conventional rear cabinet fixing method in which screws are fastened from the back side of the display device, the number of screws exposed on the back side of the device can be greatly reduced, and the appearance of the device can be improved.

Further, since the engaging member is slidable in the first direction with respect to the first member, deformation due to thermal expansion in the first direction is absorbed by the sliding movement of the engaging member with respect to the first member. can. Further, since the engaging protrusion is slidable in the second direction with respect to the engaging arm, deformation due to thermal expansion in the second direction causes the engaging protrusion to slide relative to the engaging member. can be absorbed by That is, deformation due to thermal expansion can be absorbed by sliding movement of the members in both the first and second directions perpendicular to each other, and warping of the rear cabinet due to thermal expansion can be prevented.

Further, in the above display device, at least one of the two engaging arms has a shape having a convex portion that bulges toward the opposing other engaging arm side, and the engaging projection portion is the convex portion. It can be configured to have a shape having a concave portion that fits into.

Further, in the above display device, the engaging member has a first elongated hole along the first direction, and the boss provided on the first member passes through the first elongated hole. It may be configured to be attached to the first member by a screw that is passed through the boss.

According to the above configuration, even though the engaging member is attached to the first member with the screw, the engaging member is not completely fixed by tightening the screw, and the engaging member can be easily attached to the first member. It can be slidable.

Further, in the above display device, the engaging member has a second elongated hole along the first direction, and the guide projection provided on the first member is inserted into the second elongated hole. can be configured to be attached to the first member.

According to the above configuration, by inserting the guide projection provided on the first member into the second elongated hole of the engaging member, the engaging member is configured such that the boss inserted into the first elongated hole and the second Rotation is restricted by guide projections inserted into the long holes. This enables the engaging member to slide smoothly with respect to the first member.

Further, in the above display device, the first member may be the metal member, and the second member may be the rear cabinet.

According to the above configuration, by providing the engaging projection on the side of the rear cabinet, which is a resin member, the engaging projection can be integrally resin-molded with the rear cabinet.

Further, in the above display device, the first direction may be a direction along the short side of the rear cabinet.

According to the above configuration, the first direction in which the sliding range is limited to the length in the longitudinal direction of the first long hole is aligned with the short side direction of the rear cabinet in which the difference in the amount of deformation due to thermal expansion is smaller. Therefore, it is possible to prevent the engaging member from becoming larger than necessary.

In the display device of the present invention, when the rear cabinet is attached and fixed to the metal member, the engagement protrusion on the second member (for example, the rear cabinet) side is attached to the engagement arm portion on the first member (for example, the metal member) side. By engaging the two, it is possible to greatly reduce the number of screws exposed on the rear surface of the device, thereby improving the appearance of the device. Further, since the engaging member is slidable in the first direction with respect to the first member, and the engaging protrusion is slidable in the second direction with respect to the engaging arm, the first direction perpendicular to each other is obtained. Deformation due to thermal expansion can be absorbed by the sliding movement of the members in both the direction and the second direction, and the rear cabinet can be prevented from being warped due to thermal expansion.

FIG. 2 is an exploded perspective view of the chassis and the rear cabinet extracted from the display device according to the first embodiment and viewed from the chassis side; FIG. FIG. 2 is a perspective view of the chassis of FIG. 1 as seen from the rear side; (a) is the perspective view which looked at the hook member from the upper surface side, (b) is the perspective view which looked at the hook member from the lower surface side. FIG. 4 is a diagram showing a mounting structure of the hook member to the chassis, where (a) is a top view and (b) is a cross-sectional view taken along line AA of (a). It is the perspective view which looked at the back cabinet of FIG. 1 from the front side. It is a perspective view which shows an engaging protrusion part. FIG. 10 is a side view showing an engagement state between one hook member and one engagement projection when the rear cabinet is attached and fixed to the chassis in the display device according to Embodiment 1; FIG. 11 is a side view showing an engagement state between one hook member and one engagement projection when the rear cabinet is attached and fixed to the chassis in the display device according to Embodiment 3;

[Embodiment 1]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The display device according to the present embodiment includes the chassis 100 and the rear cabinet 200 shown in FIG. FIG. 1 is an exploded perspective view showing the chassis 100 and the rear cabinet 200 extracted from the display device, and shows the state viewed from the chassis 100 side (the state viewed from the front side of the display device).

FIG. 2 is a perspective view of the chassis 100 viewed from the rear side. A plurality of hook members (engagement members) 110 are attached to the rear surface of the chassis 100 (the surface facing the rear cabinet 200). In Embodiment 1, the chassis 100 corresponds to the first member (the member to which the engaging member is attached) described in the claims. The hook member 110 can be attached to any position on the rear surface of the chassis 100 with a screw 120 (see FIG. 4), but the attachment position and the number of attachments of the hook member 110 are particularly limited in the present invention. isn't it.

A specific configuration of the hook member 110 will be described with reference to FIG. 3A is a perspective view of the hook member 110 viewed from above, and FIG. 3B is a perspective view of the hook member 110 viewed from below. For convenience of explanation, the surface where the hook member 110 contacts the chassis 100 is referred to as the lower surface.

The hook member 110 generally has a base portion 111 and an engaging arm portion 112, as shown in FIG. The base portion 111 is a substantially rectangular plate-like member, and the lower surface of the base portion 111 faces the chassis 100 when the hook member 110 is attached to the chassis 100 . The engaging arms 112 are erected so as to protrude vertically from the upper surface of the base portion 111, and the two engaging arms 112 of the hook member 110 are arranged side by side so as to face each other. Also, the arrangement direction of the two opposing engaging arm portions 112 coincides with the longitudinal direction of the base portion 111 .

Each of the engaging arm portions 112 has a shape having a mountain-shaped convex portion 112A that bulges toward the opposing engaging arm portion 112 side. That is, the interval between the two opposing engaging arms 112 becomes narrower at the top of the projection 112A, and widens again toward the tip of the engaging arm 112 from the top.

The base portion 111 is formed with one long mounting hole (first long hole) 113 and two long guide holes (second long holes) 114 . The attachment long hole 113 is provided for attaching the hook member 110 to the chassis 100 . Further, the mounting long hole 113 is provided between the two engaging arm portions 112 and is formed so as to match the base portion 111 in the longitudinal direction. The long guide hole 114 serves as a guide when the hook member 110 slides with respect to the chassis 100, and is provided to prevent the hook member 110 from shaking. Further, the long guiding holes 114 are provided on the outside of each of the two engaging arms 112 and are formed so as to be aligned with the base portion 111 in the longitudinal direction. Furthermore, it is desirable that the mounting long hole 113 and the two guide long holes 114 have the same length in the longitudinal direction.

Furthermore, a plurality of (six in FIG. 3) small protrusions 115 may be formed on the lower surface of the base portion 111 . These small protrusions 115 are intended to reduce the contact area between the hook member 110 and the chassis 100 and facilitate the sliding of the hook member 110 with respect to the chassis 100 .

4A and 4B are diagrams showing a mounting structure of the hook member 110 to the chassis 100, where (a) is a top view and (b) is a sectional view taken along the line AA of (a). A boss 122 is provided at the mounting position of the hook member 110 on the chassis 100. The boss 122 is inserted into the mounting long hole 113 of the hook member 110 and the screw 120 is fastened from above. Also, it is desirable to insert a washer 121 between the screw 120 and the boss 122 . The height of the boss 122 is set slightly larger than the thickness of the base portion 111 of the hook member 110 . As a result, even when the screws 120 are tightened, the hook member 110 is not completely fixed. slidably mounted;

A guide projection 101 is also formed on the chassis 100 in the vicinity of the boss 122 at the mounting position of the hook member 110 on the chassis 100 . The guide protrusion 101 is inserted into the guide elongated hole 114 of the hook member 110 . That is, the rotation of the hook member 110 is restricted by the boss 122 inserted into the mounting long hole 113 and the guide projection 101 inserted into the guide long hole 114, so that the hook member 110 does not shake with respect to the chassis 100. Sliding movement becomes possible.

In the configuration shown in FIG. 4, the chassis 100 has one guide protrusion 101, whereas the hook member 110 has two guide elongated holes 114. As shown in FIG. In this way, the hook member 110 becomes point symmetrical when viewed from the top by forming the two long guide holes 114, and when the hook member 110 is attached to the chassis 100, it is rotated 180 degrees when viewed from the top. Since it is possible to attach the hook member 110 in any direction, the attachment workability of the hook member 110 is improved.

Next, FIG. 5 is a perspective view of the rear cabinet 200 viewed from the front side. A plurality of engaging protrusions 210 are attached to the front surface of the rear cabinet 200 (the surface facing the chassis 100). In Embodiment 1, the rear cabinet 200 corresponds to the second member (the member provided with the engaging protrusion) described in the claims. The engaging protrusions 210 are provided in the same number as the hook members 110 on the chassis 100 , and their formation positions also face the mounting positions of the hook members 110 on the chassis 100 . Also, the engaging protrusions 210 can be resin-molded integrally with the rear cabinet 200 .

FIG. 6 is a perspective view showing one engaging protrusion 210. FIG. The engaging protrusion 210 is composed of a base portion 211 and a head portion 212 and has a recessed portion 213 near the boundary between the base portion 211 and the head portion 212 . The concave portion 213 is a portion that fits into the convex portion 112A of the hook member 110 . The base 211 is formed to stand up from the rear cabinet 200, but the height of all the engaging protrusions 210 need not be the same. That is, since the surface of the rear cabinet 200 on which the engaging protrusions 210 are formed is not necessarily a constant plane, the distance between the opposing surfaces of the rear cabinet 200 and the chassis 100 is the position where the engaging protrusions 210 are formed. Varies depending on That is, the height of the base portion 211 is set according to the distance between the opposing surfaces of the rear cabinet 200 and the chassis 100 at the positions where the respective engaging protrusions 210 are formed.

FIG. 7 is a side view showing an engagement state between one hook member 110 and one engagement protrusion 210 when attaching and fixing the rear cabinet 200 to the chassis 100. FIG. In the engagement between the hook member 110 and the engaging projection 210, the engaging projection 210 is sandwiched between the two engaging arm portions 112 of the hook member 110, and at this time, the engaging projection 210 is held at two positions. The concave portions 213 engage with the convex portions 112A of the engaging arms 112, respectively. The engaged state shown in FIG. 7 can be easily obtained by pressing the head 212 of the engaging projection 210 against the tips of the two engaging arms 112 .

As described above, in the display device according to the present embodiment, the hook members 110 attached to the chassis 100 are engaged with the engaging protrusions 210 provided on the rear cabinet 200 , whereby the rear cabinet 200 is attached to the chassis 100 . can be attached to the rear cabinet 200 to fix it. In this fixing method, compared to the conventional rear cabinet fixing method in which screws are fastened from the back side of the display device, the number of screws exposed on the back side of the device can be greatly reduced, and the appearance of the device can be improved.

Furthermore, the method of fixing the rear cabinet 200 according to the first embodiment can cope with the difference in the amount of deformation due to thermal expansion between the chassis 100 and the rear cabinet 200 . This point will be explained as follows.

First, the hook member 110 attached to the chassis 100 is not completely fixed to the chassis 100 as described above, but is slidable in the longitudinal direction of the hook member 110 . That is, if the longitudinal direction of the hook member 110 is the first direction (the A1 direction in FIG. 7), deformation due to thermal expansion in the first direction is absorbed by the hook member 110 sliding relative to the chassis 100. can.

On the other hand, with respect to the second direction (B1 direction in FIG. 7) perpendicular to the first direction, the engaging projection 210 engaged with the engaging arm 112 of the hook member 110 It becomes slidable against. That is, deformation due to thermal expansion in the second direction can be absorbed by sliding movement of the engaging protrusion 210 with respect to the hook member 110 .

As described above, the fixing method of the rear cabinet 200 according to the present embodiment can absorb deformation due to thermal expansion by sliding movement of members in both the first direction and the second direction perpendicular to each other. It is possible to prevent the rear cabinet 200 from being warped due to expansion.

Further, the fixing method of the rear cabinet 200 according to the first embodiment can greatly reduce the number of screws exposed on the rear surface of the device (the number of screws used for fixing the rear cabinet 200 can be reduced). It is not limited to completely eliminating screws exposed on the back surface. That is, it is not necessary to fix the rear cabinet 200 only by engaging the hook members 110 and the engaging protrusions 210, and screws (fastened from the rear side of the display device) may be used as an auxiliary. It should be noted that this fixing method using screws cannot cope with the difference in the amount of deformation due to thermal expansion. It is desirable to use it in a place where it can be screwed against the This is because the difference in thermal expansion coefficient between the rear cabinet 200 and the front cabinet can be reduced by using resin members.

As for the mounting direction of the hook member 110 to the chassis 100 , it is desirable that the first direction (sliding direction of the hook member 110 with respect to the chassis 100 ) is along the short side of the rear cabinet 200 . This is for the following reasons.

First, the sliding range in the first direction is limited to the longitudinal length of the attachment slot 113. If this range is increased, the hook member 110 can be attached within the limited installation range. decrease in number. Therefore, it is not preferable to increase the sliding range in the first direction more than necessary. On the other hand, the sliding range in the second direction can be easily increased by, for example, increasing the width of the engaging protrusion 210 in the second direction. For this reason, the long side direction of the rear cabinet 200, in which the difference in the amount of deformation due to thermal expansion is greater, is aligned with the second direction, and the short side direction of the rear cabinet 200, in which the difference in the amount of deformation due to thermal expansion is smaller, is aligned with the first direction. It can be said that it is preferable to match the In other words, by aligning the first direction in which the sliding range is limited to the longitudinal length of the mounting long hole 113 with the short side direction of the rear cabinet 200 in which the difference in the amount of deformation due to thermal expansion is smaller, It is possible to prevent the hook member 110 from becoming unnecessarily large in the longitudinal direction.

[Embodiment 2]
In Embodiment 1, the chassis 100 is used as the first member to which the hook member 110 is attached, and the rear cabinet 200 is used as the second member provided with the engaging protrusion 210 . However, the present invention is not limited to this, and it is also possible to use the rear cabinet 200 as the first member to which the hook member 110 is attached and the chassis 100 as the second member to which the engaging protrusion 210 is provided. .

However, in order to provide the engaging protrusion 210 integrally with the second member, the engaging protrusion 210 is provided on the side of the rear cabinet 200, which is a resin member, and the engaging protrusion 210 is integrally formed with the rear cabinet 200. It is preferable to set it as the structure to shape|mold.

[Embodiment 3]
In the first embodiment, the two engaging arm portions 112 of the hook member 110 are each provided with a convex portion 112A, and the engaging projection portion 210 is also provided with two recessed portions 213 corresponding thereto. . However, the present invention is not limited to this, and as shown in FIG. A configuration may be adopted in which the recess 213 is provided only at one location.

The embodiments disclosed this time are exemplifications in all respects and are not grounds for restrictive interpretation. Therefore, the technical scope of the present invention is not to be interpreted only by the above-described embodiments, but is defined based on the claims. In addition, all changes within the meaning and range of equivalents to the scope of claims are included.

100 chassis 101 guide projection 110 hook member (engagement member)
111 Base portion 112 Engaging arm portion 112A Convex portion 113 Mounting long hole (first long hole)
114 guide long hole (second long hole)
115 Small protrusion 120 Screw 121 Washer 122 Boss 200 Rear cabinet 210 Engagement protrusion 211 Base 212 Head 213 Recess

Claims (6)

A display device having a metal member and a rear cabinet that is a resin member attached to the back side of the metal member,
An engaging member having two engaging arms facing each other is attached to the first member, which is one of the metal member and the rear cabinet,
The second member, which is the other of the metal member and the rear cabinet, is provided with an engaging projection that engages so as to be sandwiched between the two engaging arms of the engaging member,
The engaging member is attached so as to be slidable in a first direction with respect to the first member,
The engaging protrusion engaged with the engaging arm of the engaging member is slidable with respect to the engaging arm in a second direction orthogonal to the first direction. display device. A display device according to claim 1, comprising:
At least one of the two engaging arms has a shape having a bulging convex portion on the side of the other opposing engaging arm,
A display device, wherein the engaging protrusion has a shape having a concave portion that fits into the convex portion. 3. A display device according to claim 1 or 2,
The engaging member has a first elongated hole extending in the first direction, and a boss provided on the first member passes through the first elongated hole. A display device attached to the first member. A display device according to claim 3, wherein
The engaging member has a second elongated hole extending in the first direction, and a guide protrusion provided on the first member is inserted into the second elongated hole to be attached to the first member. A display device, characterized in that: A display device according to any one of claims 1 to 4,
A display device, wherein the first member is the metal member, and the second member is the rear cabinet. A display device according to any one of claims 1 to 5,
The display device, wherein the first direction is along the short side of the rear cabinet.

Images