Chair set and display stand

Abstract

To provide a new technology for attaching a display part for displaying prescribed information to a chair.SOLUTION: A chair set includes a chair having a support part, and a pedestal for display. The pedestal for display is composed of at least one component and is provided with a display part for displaying prescribed information. The support part has a through hole penetrating from a contact surface to a non-contact surface. The pedestal for display is arranged inside the through hole such that an end part on the side of the contact surface of the pedestal for display is located on the same surface as the contact surface or enters an inner side in the thickness direction of the support part with respect to the contact surface. The pedestal for display has a maintenance mechanism for suppressing movement of the pedestal for display in the through hole and maintains an attachment state in an attachment state in which the pedestal for display is arranged inside the through hole.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a chair set and a display base. [Background technology]

[0002] Chairs used in a venue such as a multipurpose hall may need to be assigned predetermined information such as seat numbers depending on the purpose of the venue. Patent Document 1 discloses a seat number plate base for attaching a plate showing a seat number to a chair. This seat number plate base is fixed to the surface of the backrest at the lower end of the chair back, adjacent to the seat body, with screws or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-33504 Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the seat number plate base is attached to the surface of the chair, it protrudes from the surface of the chair, which can cause the seat number plate base to get in the way when a person sits on the chair.

[0005] An object of one aspect of the present disclosure is to provide a new technique for attaching a display unit that displays predetermined information to a chair. [Means for solving the problem]

[0006] One aspect of the present disclosure is a chair set comprising a chair and a display base. The chair has a support portion that supports a user. The display base is composed of at least one component and has a display portion that displays predetermined information. The support portion has a through-hole. When the surface that comes into contact with the user when the user is seated is defined as the contact surface, the through-hole penetrates from the contact surface to a non-contact surface behind the contact surface. The display base is disposed within the through-hole so that the end of the display base on the contact surface side is located on the same plane as the contact surface or is recessed inward in the thickness direction of the support portion relative to the contact surface. The display base has a maintenance mechanism. When the display base is disposed within the through-hole in an attached state, the maintenance mechanism suppresses movement of the display base within the through-hole, thereby maintaining the attached state.

[0007] In this configuration, the display base is disposed inside the through-hole so that the end of the display base on the contact surface side is located on the same plane as the contact surface or is recessed inward in the thickness direction of the support portion relative to the contact surface. This prevents the display base from protruding from the contact surface of the support portion, making it less likely to get in the way of a user sitting down. Furthermore, the display base has a retention mechanism, which prevents the display base from falling out of the through-hole after being attached to the through-hole. Furthermore, because the display base is disposed inside the through-hole of the support portion of the chair, it is possible to attach the display unit to the chair using, for example, handhold holes, which are through-holes provided in the chair for the user to rest their hands on.

[0008] In one aspect of the present disclosure, the maintenance mechanism has a locking portion. The locking portion is formed so as to expand in a direction perpendicular to the thickness direction of the support portion. The locking portion abuts against a predetermined portion of the support portion in the attached state. The locking portion also prevents the support portion from moving in at least one direction in the thickness direction within the through hole. With this configuration, when the display base is placed in the through hole, the locking portion catches on a predetermined portion of the support portion. This makes it possible to prevent the display base from falling out of at least one side of the support portion in the thickness direction within the through hole after the display base is attached to the through hole.

[0009] In one aspect of the present disclosure, the locking portion may be provided at an end portion located on the non-contact surface side and may have an abutment portion that abuts against a portion of the non-contact surface surrounding the through-hole. In this configuration, when the display base is attached to the chair from the non-contact surface side of the support portion, the abutment portion abuts against the portion of the non-contact surface surrounding the through-hole. Therefore, the attachment position of the display base relative to the through-hole can be determined so that the display base does not penetrate the through-hole beyond a predetermined position.

[0010] In one aspect of the present disclosure, the display base may be configured with two components: a first component disposed on the non-contact surface side of the through hole, and a second component disposed on the contact surface side. The first component may have an abutting portion. The second component may have a determining portion as a locking portion provided at an end portion located on the contact surface side, which determines the mounting position of the second component relative to the through hole. With this configuration, when the first component is mounted from the non-contact surface side and the second component is mounted from the contact surface side, the display base can be mounted by sandwiching the through hole between the first component and the second component.

[0011] In one aspect of the present disclosure, the display base may further include a fastening member that fastens the first component and the second component together. With this configuration, the first component and the second component are fastened together by the fastening member, so that the display base can be more firmly fixed to the through-hole.

[0012] In one aspect of the present disclosure, the chair may have at least one of a convex portion and a concave portion on the inner surface forming the through hole. The maintaining mechanism may be a fitting portion that fits with at least one of the convex portion and the concave portion. With this configuration, the fitting portion fits with at least one of the convex portion and the concave portion provided on the inner surface forming the through hole, making it easier to maintain the display base attached to the through hole. As a result, it is possible to prevent the display base from falling out of the through hole. Furthermore, the fitting portion can determine the attachment position of the display base relative to the through hole.

[0013] One aspect of the present disclosure is a display base composed of at least one component and equipped with a display unit that displays predetermined information. When the surface of a support unit in a chair that supports a user that comes into contact with the user when the user is seated is defined as a contact surface, the display base is used so that the end of the display base on the contact surface side is positioned flush with the contact surface or is positioned inside a through-hole in the support unit that penetrates from the contact surface to a non-contact surface behind the contact surface, so that the end is positioned on the same plane as the contact surface or is located inside the support unit in the thickness direction of the contact surface. The display base has a retention mechanism. When the display base is attached and positioned inside the through-hole, the retention mechanism suppresses movement of the display base within the through-hole, maintaining the attached state.

[0014] According to this configuration, the display base is attached to the through-hole so that the end of the display base on the contact surface side is located on the same plane as the contact surface or is recessed inward in the thickness direction of the support part relative to the contact surface. This makes it possible to provide a display base that does not protrude from the contact surface, i.e., does not get in the way when the user sits down. Furthermore, since the display base has a retention mechanism, it is possible to provide a display base that is less likely to fall out of the through-hole. Furthermore, since the display base is attached to the through-hole of the support part of the chair, it can be attached using, for example, handhold holes, which are through-holes provided in the chair for the user to rest their hands on. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a bench-type chair set as seen from the front side. [Figure 2] FIG. 1 is a perspective view showing a bench-type chair set as seen from the rear side. [Figure 3] FIG. 1 is an exploded perspective view of a display base attached to a chair. [Figure 4] FIG. 1 is a front view of a display base attached to a chair. [Figure 5] FIG. 5 is a cross-sectional view of FIG. 4 . [Figure 6] 6 is a cross-sectional view taken along the line VI-VI in FIG. 4. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 4. [Figure 8] This is a perspective view showing a small chair type chair set seen from the front side. [Figure 9] FIG. 1 is a perspective view showing a bench-type chair set in which a display base is attached to the chair seat. [Figure 10] FIG. 10 is a cross-sectional view schematically showing a modified example of the display base. [Figure 11] FIG. 10 is a cross-sectional view schematically showing a display base having a fitting portion. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. Configuration] [1-1. Overall structure] The chair set 100 shown in Figures 1 and 2 includes a chair 1 and a display base 2. In this chair set 100, the display base 2 is attached to the chair 1, so that predetermined information such as a seat number can be assigned to the chair 1. In this embodiment, the chair 1 is a fixed bench type chair such as those used in stadiums, etc. In the following explanation, the up-down direction, the front-back direction, and the left-right direction are expressed based on a user seated normally in the chair 1.

[0017] [1-2. Chair] The chair 1 has three support parts 10 and a leg body 20. The support section 10 is a section that supports the user. The support section 10 has a seat body 11 and a backrest 12.

[0018] In this embodiment, the support part 10 has an L-shape and is configured by integrally connecting a seat body 11 and a backrest 12. The seat body 11 is roughly rectangular and is configured to be able to support the buttocks of a seated user. The backrest 12 is roughly rectangular and is configured to be able to support the back of a seated user.

[0019] The support portion 10 has a contact surface 101 and a non-contact surface 102 . The contact surface 101 is the surface of the support part 10 that comes into contact with the user when the user is seated, i.e., the upper surface of the seat body 11 and the front surface of the backrest 12. The non-contact surface 102 is the surface of the support part 10 on the reverse side of the contact surface 101, i.e., the lower surface of the seat body 11 and the rear surface of the backrest 12.

[0020] As shown in Fig. 3, the support part 10 has a through-hole 13 that penetrates from the contact surface 101 to the non-contact surface 102 and has a length in the left-right direction. Specifically, as shown in Fig. 4, the through-hole 13 is formed in a horizontally elongated, approximately trapezoidal shape with the upper base longer than the lower base when the backrest 12 is viewed from the front side. In this embodiment, the through-hole 13 is provided near the upper end of the backrest 12. The through-hole 13 can also function as a hand hole in the chair 1 into which fingers or the like can be inserted.

[0021] As shown in FIGS. 2 and 5 to 7, in this embodiment, the backrest 12 has a frame portion 130 that protrudes rearward around the through-hole 13 on the non-contact surface 102 side. The frame portion 130 is formed in a generally trapezoidal shape along the outer periphery of the through-hole 13. This frame portion 130 extends the length of the through-hole 13 in the front-to-rear direction, so that the length of the through-hole 13 in the front-to-rear direction is greater than the thickness of the backrest 12. An upper side surface 131 and a lower side surface 132 on the inner surface that forms the through-hole 13 are parallel to each other. Furthermore, the upper side surface 131 and the lower side surface 132 are inclined with respect to the contact surface 101 of the backrest 12 so that the further away they are from the contact surface 101, the lower they are located.

[0022] In this embodiment, the upper end portion 121 of the backrest 12 is bent rearward. By bending the upper end portion 121 rearward in this manner, a first groove 122 is formed above the through-hole 13 on the non-contact surface 102 side of the backrest 12, specifically between the frame portion 130 and the upper end portion 121.

[0023] 1 and 2, the leg 20 is provided below the seat 11 and supports the support part 10 from below. The leg 20 has a right leg 201, a left leg 202, and a connecting part 203.

[0024] The right leg 201 is disposed below the rightmost support section 10 of the three support sections 10 arranged side by side in the left-right direction. The left leg 202 is disposed below the leftmost support section 10 of the three support sections 10 arranged side by side in the left-right direction. The connecting section 203 is a member having a length in the left-right direction, and connects and fixes the three support sections 10 arranged side by side in the left-right direction. The connecting section 203 is disposed between the seat body 11 of each of the three support sections 10 and the right leg 201 and the left leg 202. In other words, the three support sections 10 are supported by the right leg 201 and the left leg 202 via the connecting section 203 while being fixed side by side in the left-right direction.

[0025] [1-3.Display pedestal] As shown in Fig. 3 and Fig. 5 to Fig. 7, the display base 2 is attached to the backrest 12 of the support part 10 by being placed inside the through-hole 13. The display base 2 includes a first part 21, a second part 22, a display part 23, and a fastening member 24. For the sake of convenience, the display part 23 and the fastening member 24 are not shown in Fig. 5 to Fig. 7.

[0026] The first component 21 is disposed on the non-contact surface 102 side of the support portion 10, that is, on the rear side, of the through-hole 13. The first component 21 is a member that closes the through-hole 13 from the rear side. The first component 21 has a lid portion 210, a horizontal plate 211, and three vertical plates 212. The lid portion 210 is formed in a horizontally elongated, generally trapezoidal shape when viewed from the front. The horizontal plate 211 is a plate-like member extending vertically and in the left-right direction from the surface of the lid portion 210 on the contact surface 101 side, i.e., the front surface of the lid portion 210. The horizontal plate 211 is disposed near the center of the lid portion 210 in the up-down direction. The three vertical plates 212 are plate-like members extending vertically and in the up-down direction from the front surface of the lid portion 210. The three vertical plates 212 are disposed parallel to each other and aligned in the left-right direction at intervals. Each of the three vertical plates 212 has a second groove 213. When the first component 21 is attached to the through hole 13, a portion of the frame portion 130 located above the through hole 13 is inserted into the second groove 213. Of the three vertical plates 212, the two vertical plates 212 arranged on both the left and right sides have protruding portions 214 that protrude forward in a generally cylindrical shape below the respective second grooves 213. A hole 215, which is a through hole, is formed in the center of each of these protruding portions 214. In other words, the two holes 215 are provided in the first component 21 side by side with a gap between them in the left-right direction.

[0027] The first component 21 is attached to the through hole 13 in such a direction that the upper base of the generally trapezoidal shape is longer than the lower base when viewed from the front. At this time, the horizontal plate 211, the protruding portion 214, and the lower portions of the second grooves 213 of each of the three vertical plates 212 are positioned inside the through hole 13. The portions of the frame 130 located above the through hole 13 are inserted into the second grooves 213. The upper portions of the second grooves 213 of each of the three vertical plates 212 are inserted into the first grooves 122 formed above the frame 130. The upper portions of the second grooves 213 of each of the three vertical plates 212 of the first component 21 function as abutment portions 216 that abut against the non-contact surface 102 surrounding the through hole 13. In this embodiment, the attachment position of the first component 21 with respect to the through hole 13 is determined by the abutment portions 216.

[0028] The second component 22 is disposed on the contact surface 101 side of the support part 10, i.e., the front side, of the through hole 13. The second component 22 is formed in a horizontally elongated, generally trapezoidal shape when viewed from the front. The second component 22 is a member that closes the through hole 13 from the front side.

[0029] The second component 22 has a bottom 221 and sidewalls 222. The bottom 221 is a flat, plate-like portion. The sidewalls 222 are provided on the periphery of the bottom 221 and extend from the bottom 221 toward the contact surface 101, i.e., toward the front. In other words, the second component 22 has a recessed central portion so that the display unit 23, which will be described later, can be housed inside the sidewalls 222.

[0030] The inner surface of the side wall portion 222 extends perpendicularly to the bottom portion 221. The outer surface of the side wall portion 222 extends obliquely so as to widen outward relative to the bottom portion 221. Therefore, the front end portion of the side wall portion 222 has a shape that widens outward. In other words, the front end portion of the side wall portion 222 has a shape that widens in directions (left-right and up-down directions) perpendicular to the thickness direction (front-back direction) of the support portion 10. The second component 22 has, in the bottom portion 221, two holes 224 that are through holes spaced apart in the left-right direction.

[0031] The second part 22 is attached to the through hole 13 in an orientation such that the upper base of the generally trapezoidal shape is longer than the lower base when viewed from the front. At this time, the bottom 221 and the side wall 222 are disposed inside the through hole 13. The front end of the side wall 222 abuts against the inner surface of the through hole 13 on the contact surface 101 side. The front end of the side wall 222 of the second part 22 functions as a defining portion 223 that defines the attachment position of the second part 22 with respect to the through hole 13. In this embodiment, the second part 22 is disposed inside the through hole 13 so that the defining portion 223 is located on the same plane as the contact surface 101 of the backrest 12. The defining portion 223 is the portion of the second part 22 that is located closest to the contact surface 101.

[0032] In addition, in an attached state in which the first component 21 and the second component 22 are disposed inside the through-hole 13, the bottom 221 abuts against the horizontal plate 211 and the three vertical plates 212. A space is formed in the portion of the second component 22 that is not in contact with the first component 21.

[0033] The display unit 23 is a plate-like member formed in a horizontally elongated, approximately trapezoidal shape when viewed from the front. The display unit 23 is arranged on the surface of the bottom 221 of the second component 22 facing the contact surface 101, with the upper base of the approximately trapezoidal shape longer than the lower base when viewed from the front. In this embodiment, the display unit 23 is a seat number plate that displays the seat number as the predetermined information. The display unit 23 has two holes 231 that are through-holes spaced apart in the left-right direction. When the display unit 23, the second component 22, and the first component 21 are stacked and arranged in the through-hole 13, the two holes 231 of the display unit 23 overlap with the two holes 224 of the second component 22 and the two holes 215 of the first component 21.

[0034] The fastening members 24 are inserted so as to pass through the two holes 231 in the display unit 23, the two holes 224 in the second component 22, and the two holes 215 in the first component 21 from the front side, thereby fixing the display unit 23, the second component 22, and the first component 21 in an overlapping state within the through-hole 13. Rivets, screws, etc. are used as the fastening members 24. By fixing the display unit 23, the second component 22, and the first component 21 in the through-hole 13 in this way with the fastening members 24, movement of the display base 2 within the through-hole 13 is suppressed, and the display base 2 is maintained in an attached state disposed within the through-hole 13.

[0035] [2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (2a) In this embodiment, the defining portion 223 of the second part 22 abuts against the inner surface of the through-hole 13 on the contact surface 101 side so as to be located flush with the contact surface 101 of the backrest 12, and the bottom 221 and side wall 222 of the second part 22 are disposed inside the through-hole 13. As a result, the second part 22 does not protrude from the contact surface 101 of the backrest 12 and is therefore less likely to get in the way of a user when seated. Furthermore, because the display unit 23, the second part 22, and the first part 21 are fixed in the through-hole 13 by the fastening members 24, it is possible to prevent the display base 2 from falling out of the through-hole 13 after the display base 2 is attached to the through-hole 13. Furthermore, because the display base 2 is disposed inside the through-hole 13 of the support part 10 of the chair 1, it is possible to attach a display unit that displays predetermined information, such as a seat number, to the chair using, for example, handhold holes, which are through-holes provided in the chair for the user to place their hands on.

[0036] (2b) In the present embodiment, when the first component 21 is attached to the chair 1 from the non-contact surface 102 side of the support unit 10, the abutting portion 216 is inserted into the first groove 122 formed between the frame portion 130 and the upper end portion 121 of the backrest 12. This causes the abutting portion 216 to abut against the portion of the non-contact surface 102 surrounding the through-hole 13. Furthermore, when the second component 22 is attached to the chair 1 from the contact surface 101 side of the support unit 10, the defining portion 223 abuts against the inner surface of the through-hole 13 on the contact surface 101 side. This allows the attachment positions of the first component 21 and the second component 22 with respect to the through-hole 13 to be defined so that the first component 21 and the second component 22 do not pass through the through-hole 13 beyond a predetermined position.

[0037] (2c) In this embodiment, the display base 2 includes the fastening member 24. As a result, the first component 21, the second component 22, and the display unit 23 are fastened together by the fastening member 24, and therefore the display base 2 can be firmly fixed to the through-hole 13.

[0038] In this embodiment, the abutting portion 216 of the first component 21, the defining portion 223 of the second component 22, and the fastening member 24 correspond to an example of a maintaining mechanism. The abutting portion 216 and the defining portion 223 correspond to an example of a locking portion. The defining portion 223 corresponds to an end portion of the display base 3 on the contact surface 101 side. The inner surface of the through-hole 13 on the contact surface 101 side and the portion of the non-contact surface 102 surrounding the through-hole 13 correspond to an example of a predetermined portion of the support portion 10.

[0039] 3. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0040] (3a) In the above embodiment, the chair set 100 is illustrated as an example in which the display base 2 is attached to a bench-type chair 1 having three support parts 10, but the configuration of the chair set is not limited to this. For example, as shown in Fig. 8, the chair set 100a may be configured as a small chair-type chair 1a formed of a tubular metal pipe and having a right leg 201a and a left leg 202a that support the support parts 10 from the lower right and lower left, and in which the display base 2 is attached to the small chair 1a.

[0041] (3b) In the above embodiment, the display base 2 is attached to the through-hole 13 provided in the support part 10 near the upper end of the backrest 12, but the position at which the display base 2 is attached to the chair 1 is not limited to this. For example, the display base 2 may be attached to the lower side of the backrest 12, for example, near the boundary between the backrest 12 and the seat body 11. Furthermore, for example, the display base 2 may be attached to the seat body 11. Specifically, as in the chair set 100b shown in FIG. 9, the display base 2 may be attached to a through-hole provided in the support part 10b near the front end of the seat body 11b.

[0042] (3c) In the above embodiment, the display base 2 is illustrated as having a configuration including the first component 21, the second component 22, the display unit 23, and the fastening member 24, but the configuration of the display base is not limited to this. For example, the display base may have a configuration without the fastening member 24. For example, the first component and the second component may be attached with an adhesive or the like at the contacting portion. Furthermore, the first component and the second component may be directly fixed using a mechanism such as press fitting or engagement with a hook portion.

[0043] 10, the display base 2c may include a main body 21c and a display unit 23c. The main body 21c is made of resin. The main body 21c has an abutment portion 216c and an insertion portion 217. The insertion portion 217 is provided at the end of the main body 21c located on the contact surface 101 side, i.e., the front side, and is disposed inside a through-hole 13c provided in the support portion 10c. The abutment portion 216c is provided at the end of the main body 21c located on the non-contact surface 102 side, i.e., the rear side, and has a shape that widens at least partially outward from the periphery of the insertion portion 217. The abutment portion 216c abuts against the portion of the non-contact surface 102 surrounding the through-hole 13c. In the example shown in FIG. 10, the abutment portion 216c is formed so that its vertical length is greater than that of the insertion portion 217. Furthermore, the vertical length of the insertion portion 217 is slightly larger than the vertical length of the through hole 13c. For example, the cross-sectional shape of the insertion portion 217 is substantially the same as the cross-sectional shape of the through hole 13c, but is slightly larger than the cross-sectional shape of the through hole 13c. Because the main body 21c is made of resin, it is easily deformed when force is applied. Therefore, when the insertion portion 217 of the main body 21c is inserted into the through hole 13c by applying force, the insertion portion 217 is deformed to fit into the through hole 13c, thereby enabling insertion. When the insertion portion 217 is disposed inside the through hole 13c, the main body 21c is firmly fixed in the through hole 13c due to the frictional force generated between the inner surface 131c forming the through hole 13c and the abutment surface 218 of the insertion portion 217 abutting against the through hole 13c. Therefore, after the main body 21c is attached to the through hole 13c, it is possible to prevent the main body 21c from falling out of the through hole 13c. In the example shown in Fig. 10, the configuration of the inner surface 131c that forms the through hole 13c and the abutment surface 218 of the insertion portion 217 that generate the frictional force corresponds to an example of the maintaining mechanism.

[0044] 11, the display base 2d may include a main body 21d and a display unit 23d. The main body 21d is made of resin. The main body 21d has an abutment portion 216d and an insertion portion 217d. The abutment portion 216d has a shape similar to the abutment portion 216c described above. The insertion portion 217d is provided on the contact surface 101 side of the main body 21d, i.e., on the front end, and is disposed inside a through-hole 13d provided in the support portion 10d. In the example shown in FIG. 11, two recesses 133 are formed on an inner surface 131d that forms the through-hole 13d, facing each other in the vertical direction. A contact surface 218d of the insertion portion 217d that abuts against the through-hole 13d is formed with protrusions 219 that face each other in the vertical direction. The protrusion 219 is formed to fit into the recess 133 of the inner surface 131d that defines the through hole 13d when the insertion portion 217d is disposed inside the through hole 13d in an attached state. The cross-sectional shape of the insertion portion 217d excluding the protrusion 219 is substantially the same as the cross-sectional shape of the through hole 13d. Because the main body 21d is made of resin, it is prone to deformation when force is applied. Therefore, even if the main body 21d has the protrusion 219, when force is applied to insert the insertion portion 217d of the main body 21d into the through hole 13d, the protrusion 219 is slightly crushed, and the insertion portion 217d is deformed to fit into the through hole 13d, enabling the insertion. In an attached state in which the insertion portion 217d is disposed inside the through hole 13d, the recess 133 of the inner surface 131d forming the through hole 13d fits into the protrusion 219 of the abutment surface 218d of the insertion portion 217d, thereby firmly fixing the main body portion 21d in the through hole 13d. This prevents the main body portion 21d from falling out of the through hole 13d after the main body portion 21d is attached to the through hole 13d. In the example shown in FIG. 11 , the protrusion 219 corresponds to an example of an engaging portion, and the recess 133 of the inner surface 131d forming the through hole 13d and the protrusion 219 of the abutment surface 218d of the insertion portion 217d correspond to an example of a retaining mechanism.

[0045] The inner surface forming the through hole may have a convex portion instead of a concave portion, or both a concave portion and a convex portion. In this case, the contact surface of the insertion part may have a concave portion instead of a convex portion, or both a convex portion and a concave portion, as long as it is configured to be able to fit with the concave portion or convex portion formed on the inner surface forming the through hole. Furthermore, the positions and number of convex portions and concave portions provided on the contact surface of the inner surface forming the through hole and the insertion part are not limited to the above-mentioned configuration. For example, the convex portions and concave portions may be provided opposite each other in the left-right direction on the contact surface of the inner surface forming the through hole and the insertion part, or may be provided side by side in the left-right direction or up-down direction. For example, one or three or more convex portions and concave portions may be provided on the contact surface of the inner surface forming the through hole and the insertion part.

[0046] (3d) In the above embodiment, the display units 23, 23c, 23d are illustrated as being separate from the first part 21 and the second part 22 or the main body parts 21c, 21d in the display bases 2, 2c, 2d. However, for example, the display units may be integral with the second part or the main body part.

[0047] (3e) In the above embodiment, a configuration in which the display units 23, 23c, and 23d are arranged on the front side of the display bases 2, 2c, and 2d is illustrated, but the positions at which the display units are arranged are not limited to this. For example, the display units may be arranged on the rear side of the display base, or on both the front and rear sides of the display base. In other words, the display units may be arranged on the rear side of the first component, or on both the front side of the second component and the rear side of the first component. Furthermore, the display units may be arranged on the rear side of the main body, or on both the front and rear sides of the main body.

[0048] (3f) In the above embodiment, the second part 22 is disposed inside the through hole 13 so that the defining portion 223 is located on the same plane as the contact surface 101 of the backrest 12, but the second part 22 may be disposed inside the through hole 13 so that the defining portion 223 is located further inside the through hole 13 than the contact surface 101. Even in such a configuration, the second part 22 does not protrude from the contact surface 101 of the backrest 12, and therefore is less likely to get in the way when the user is seated.

[0049] (3g) In the above embodiment, the first component 21 and the main body portions 21c and 21d have the contact portions 216, 216c, and 216d that contact the portions surrounding the through hole 13c on the non-contact surface 102. However, for example, the first component and the main body portion may have a defining portion that contacts the inner surface of the through hole 13 on the non-contact surface 102 side.

[0050] (3h) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Furthermore, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified by the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0051] 1, 1a... chair, 2, 2c, 2d... display base, 10, 10b, 10c, 10d... support part, 11, 11b... seat body, 12... backrest, 13, 13c, 13d... through hole, 20... leg body, 21... first part, 21c, 21d... main body part, 22... second part, 23, 23c, 23d... display part, 24... fastening member, 100, 100a, 100b... chair set, 101... contact surface, 102... non-contact surface, 121... upper side end part, 122... first groove, 130... frame part, 13 1...Upper side surface, 131c, 131d...Inner surface, 132...Lower side surface, 133...Concave part, 201,201a...Right leg body, 202,202a...Left leg body, 203...Connecting part, 210...Lid part, 211...Horizontal plate, 212...Vertical plate, 213...Second Groove, 214...protrusion, 215,224,231...hole, 216,216c,216d...contact part, 217,217d...insertion part, 218,218d...contact surface, 219...convex part, 221...bottom part, 222...side wall part, 223...defining part.

Claims

1. A chair having a support portion for supporting a user; A display base including at least one component and a display unit for displaying predetermined information; Equipped with When a surface of the support portion that contacts the user when the user sits down is defined as a contact surface, the support portion has a through hole that penetrates from the contact surface to a non-contact surface on the rear side of the contact surface, The display base is the end of the display base on the contact surface side is located on the same plane as the contact surface, or is disposed inside the through hole so as to be located inside the support part in a thickness direction relative to the contact surface; a retention mechanism that suppresses movement of the display base within the through hole and maintains the mounting state when the display base is disposed inside the through hole, the retaining mechanism has a locking portion that is formed so as to extend in a direction perpendicular to a thickness direction of the support portion, and that abuts against a predetermined portion of the support portion in the attached state and suppresses movement of the support portion in at least one direction in the thickness direction within the through hole, the display base has, as the engaging portion, a contact portion provided at an end portion located on the non-contact surface side, which is a part of the non-contact surface in which the through hole is formed, and which contacts a portion of the non-contact surface around the through hole; the display base is configured with two components, a first component arranged on the non-contact surface side and a second component arranged on the contact surface side in the through hole, The first component has the abutment portion, The second part has a determining portion as the engaging portion, which is provided at the end portion located on the side of the contact surface and determines the mounting position of the second part relative to the through hole, and the outer circumferential portion of the determining portion abuts against a predetermined portion of the support part.

2. 2. A chair set according to claim 1, The display base further comprises a fastening member for fastening the first part and the second part to the chair set.

3. A display base including a display unit that displays predetermined information and is configured by at least one component, The display stand is: When a surface of a support part of a chair supporting a user that comes into contact with the user when the user is seated is defined as a contact surface, the end of the display base on the contact surface side is positioned on the same plane as the contact surface, or is used so as to be positioned inside a through hole of the support part that penetrates from the contact surface to a non-contact surface on the back side of the contact surface so as to be inward in the thickness direction of the support part relative to the contact surface, a retention mechanism that suppresses movement of the display base within the through hole and maintains the mounting state when the display base is disposed inside the through hole, the retaining mechanism has a locking portion that is formed so as to extend in a direction perpendicular to a thickness direction of the support portion, and that abuts against a predetermined portion of the support portion in the attached state and suppresses movement of the support portion in at least one direction in the thickness direction within the through hole, the display base has, as the locking portion, a contact portion provided at an end portion located on the non-contact surface side, which is a part of the non-contact surface in which the through hole is formed, and which contacts a portion of the non-contact surface around the through hole; the display base is configured with two components, a first component arranged on the non-contact surface side and a second component arranged on the contact surface side in the through hole, The first component has the abutment portion, The second part has a determining portion as the engaging portion, which is provided at an end portion located on the contact surface side and determines the mounting position of the second part relative to the through hole, and the outer circumferential portion of the determining portion abuts a predetermined portion of the support part.

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