Sheet

Abstract

To provide a seat that can reduce a work load in partial replacement.SOLUTION: A seat includes: a seat cushion; and a seat frame for supporting the seat cushion. The seat cushion includes a replacement part capable of being attached to and detached from the seat frame. The replacement part includes: a hook projecting toward the seat frame; and a part to be engaged provided in a position offset in a seat longitudinal direction relative to the hook. The seat frame includes: a rod extending in a seat width direction and which the hook can engage; and a lock mechanism capable of displacing into a lock state of regulating detachment of the part to be engaged from the seat frame by engaging the part to be engaged and a lock release state of allowing detachment of the part to be engaged from the seat frame.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This disclosure relates to a seat.

Background Art

[0002] In a general seat on which a user sits, a seat cushion and a seat back are fixed to a seat frame. As the seat cushion and the seat back, for example, those in which a cover and a cushion material are integrated are known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a seat shared by an unspecified number of users, when dirt or damage occurs, it is necessary to perform cleaning or replacement. Even in a seat in which a cover and a cushion material are integrated as described above, since disassembly and assembly work are required for attachment and detachment from the seat frame, the work load for cleaning and replacement is large.

[0005] One aspect of this disclosure aims to provide a seat capable of reducing the load of partial replacement work.

Means for Solving the Problems

[0006] One aspect of the present disclosure is a seat (1) including a seat cushion (2), a seat back (3), and a seat frame (4) that supports the seat cushion (2) and the seat back (3). At least one of the seat cushion (2) and the seat back (3) has an exchange part (21, 31) detachable from the seat frame (4). The exchange part (21, 31) has hooks (23A, 23B, 33) protruding toward the seat frame (4) and engaged parts (25A, 25B, 35A, 35B) provided at positions shifted in the front-rear direction or the vertical direction of the seat with respect to the hooks (23A, 23B, 33).

[0007] The seat frame (4) extends in the seat width direction and has rods (54, 66) with which the hooks (23A, 23B, 33) can be engaged, and a locking mechanism (56, 68) displaceable between a locked state that restricts detachment of the engaged parts (25A, 25B, 35A, 35B) from the seat frame (4) by engaging with the engaged parts (25A, 25B, 35A, 35B) and an unlocked state that allows detachment of the engaged parts (25A, 25B, 35A, 35B) from the seat frame (4).

[0008] According to such a configuration, by switching the locking mechanism (56, 68) to the unlocked state, the exchange part (21, 31) can be detached from the seat frame (4). Further, when the exchange part (21, 31) is attached, the engaged parts (25A, 25B, 35A, 35B) can be guided to the locking mechanism (56, 68) by swinging the exchange part (21, 31) about the rods (54, 66) with the hooks (23A, 23B, 33) engaged with the rods (54, 66). Therefore, the load of the replacement work of a part of the seat (1) can be reduced.

[0009] In one aspect of the present disclosure, the engaged portions (25A, 25B, 35A, 35B) may have tip portions (251, 351) formed of a wire bent in a U shape. The locking mechanisms (56, 68) may have insertion portions (561A, 561B, 681A, 681B) configured to be displaced between a first position inserted inside the tip portions (251, 351) and a second position away from the inside of the tip portions (251, 351). According to such a configuration, the locking mechanisms (56, 68) can be made relatively simple in configuration. Therefore, the cost of the seat (1) can be reduced.

[0010] In one aspect of the present disclosure, the locking mechanisms (56, 68) may include a release lever (563, 683) and a link mechanism (564, 684) configured to displace the insertion portions (561A, 561B, 681A, 681B) from the first position to the second position by sliding the release lever (563, 683). According to such a configuration, the unlocking operation on the locking mechanisms (56, 68) when the replacement portions (21, 31) are detached becomes easy. Therefore, the reduction of the load of the replacement work of the replacement portions (21, 31) is promoted.

[0011] In one aspect of the present disclosure, the replacement portions (21, 31) may have a seat-side connector (36) electrically connected to an electronic device housed in the replacement portions (21, 31). The seat frame (4) may have a frame-side connector (69) detachable from the seat-side connector (36). The seat-side connector (36) may be connected to the frame-side connector (69) in a state where the engaged portions (25A, 25B, 35A, 35B) are engaged with the locking mechanisms (56, 68). According to such a configuration, when an electronic device is mounted on the replacement portions (21, 31), the electrical connection of the electronic device can be made without separately performing connection work such as a wire harness.

[0012] It should be noted that the reference numerals in the above parentheses are examples showing the correspondence with the specific configurations and the like described in the embodiments to be described later, and the present disclosure is not limited to the specific configurations and the like indicated by the reference numerals in the above parentheses.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First Embodiment] [1-1. Configuration] The seat 1 shown in Figure 1 includes a seat cushion 2, a seat back 3, and a seat frame 4.

[0015] The seat 1 is, for example, a seat used in vehicles such as automobiles, railway vehicles, ships, and airplanes. Further, the seat 1 may be a seat arranged in facilities such as movie theaters and theaters.

[0016] The seat cushion 2 is a part for supporting the buttocks etc. of the seated person. The seat back 3 is a part for supporting the back of the seated person. The seat frame 4 has a cushion frame 5, a back frame 6, a first leg 7A, and a second leg 7B.

[0017] The cushion frame 5 supports the seat cushion 2. The back frame 6 supports the seat back 3. The first leg 7A and the second leg 7B connect the cushion frame 5 and the back frame 6 and are attached to the floor surface.

[0018] <Cushion frame> As shown in FIGS. 2A and 2B, the cushion frame 5 has a first side frame 51, a second side frame 52, a front frame 53, a first rod 54, a second rod 55, and a cushion locking mechanism 56.

[0019] The first side frame 51 and the second side frame 52 are each panel-shaped members that extend in the front-rear direction of the seat and are arranged apart from each other in the seat width direction. The first side frame 51 is arranged on the right side of the second side frame 52.

[0020] The front frame 53 is arranged across the front end portions of the first side frame 51 and the second side frame 52. The front frame 53 has an internal space for accommodating the cushion locking mechanism 56.

[0021] The first rod 54 connects the rear end portion of the first side frame 51 and the rear end portion of the second side frame 52 in the sheet width direction. The second rod 55 connects the first side frame 51 and the second side frame 52 in the sheet width direction in front of the sheet compared to the first rod 54. The first rod 54 and the second rod 55 extend in the sheet width direction.

[0022] The cushion locking mechanism 56 is a device that locks the attachment and detachment of the cushion replacement portion 21 of the seat cushion 2. The cushion locking mechanism 56 is housed in the front frame 53. The configuration of the cushion locking mechanism 56 will be described later.

[0023] <Seat cushion> The seat cushion 2 shown in FIG. 1 has a cushion replacement portion 21 that is detachable from the cushion frame 5.

[0024] As shown in FIG. 3A, the cushion replacement portion 21 has a main body 22, a first hook 23A, a second hook 23B, a first contact portion 24A, a second contact portion 24B, a first engaged portion 25A, and a second engaged portion 25B.

[0025] The main body 22 is a portion that constitutes the seating surface of the seat cushion 2. The main body 22 has, for example, a pan formed of resin, a cushion material formed of, for example, urethane disposed within the pan, and a cover that covers the cushion material.

[0026] The first hook 23A and the second hook 23B each project from the lower surface of the main body 22 toward the cushion frame 5. Specifically, the first hook 23A and the second hook 23B are formed in a C shape having a groove that opens toward the rear of the sheet.

[0027] The first hook 23A and the second hook 23B are arranged apart from each other in the sheet width direction. The first hook 23A is arranged on the left side of the second hook 23B. Also, the first hook 23A and the second hook 23B are arranged near the rear end portion of the main body 22.

[0028] The first contact portion 24A and the second contact portion 24B are recessed portions that are curved so as to be recessed upward toward the sheet. The first contact portion 24A is disposed in front of the sheet of the first hook 23A on the lower surface of the main body 22. The second contact portion 24B is disposed in front of the sheet of the second hook 23B on the lower surface of the main body 22.

[0029] As shown in FIG. 3B, the first hook 23A and the second hook 23B can be engaged with the first rod 54 from the front of the sheet. Further, the first contact portion 24A and the second contact portion 24B come into contact with the second rod 55 from above.

[0030] When the cushion replacement portion 21 is attached to the cushion frame 5, the first hook 23A and the second hook 23B are supported by the first rod 54, and the first contact portion 24A and the second contact portion 24B are supported by the second rod 55.

[0031] The first engaged portion 25A and the second engaged portion 25B are provided at positions shifted in the front-rear direction of the sheet (specifically, in front of the sheet) with respect to the first hook 23A and the second hook 23B. The first engaged portion 25A and the second engaged portion 25B are engaged with the cushion locking mechanism 56 to fix the cushion replacement portion 21 to the cushion frame 5.

[0032] The first engaged portion 25A and the second engaged portion 25B are arranged side by side in the sheet width direction. The first engaged portion 25A is arranged on the left side of the second engaged portion 25B. The first engaged portion 25A and the second engaged portion 25B protrude from the lower surface of the main body 22. The first engaged portion 25A and the second engaged portion 25B are arranged in front of the sheet more than the first contact portion 24A and the second contact portion 24B.

[0033] As shown in FIG. 4, the first engaged portion 25A and the second engaged portion 25B each have a tip portion 251 formed of a wire curved in a U shape. The tip portion 251 has an extending portion in which two wires extend parallel to each other and in the vertical direction, and a lower end portion (i.e., the bottom of the U shape) in which the two wires constituting the extending portion are connected in the sheet width direction. In FIG. 4, portions other than the first engaged portion 25A and the second engaged portion 25B of the cushion replacement portion 21 are not shown.

[0034] <Cushion locking mechanism> The cushion locking mechanism 56 is displaceable between a locked state in which the first engaged portion 25A and the second engaged portion 25B are engaged to restrict the detachment of the first engaged portion 25A and the second engaged portion 25B from the cushion frame 5, and an unlocked state in which the detachment of the first engaged portion 25A and the second engaged portion 25B from the cushion frame 5 is permitted.

[0035] The cushion locking mechanism 56 includes a left insertion portion 561A, a right insertion portion 561B, a left restricting portion 562A, a right restricting portion 562B, a release lever 563, and a link mechanism 564.

[0036] The left insertion portion 561A is configured to be displaceable between a first position inserted inside the tip portion 251 of the first engaged portion 25A and a second position away from the inside of the tip portion 251 of the first engaged portion 25A.

[0037] The right insertion portion 561B is configured to be displaceable between a first position inserted inside the tip portion 251 of the second engaged portion 25B and a second position away from the inside of the tip portion 251 of the second engaged portion 25B.

[0038] When the left insertion portion 561A and the right insertion portion 561B are each in the first position, they penetrate the U-shaped hollow portion of the tip portion 251 in the sheet front-rear direction. When the left insertion portion 561A and the right insertion portion 561B are each in the second position, they are located behind the sheet and on the right side relative to the first position.

[0039] The left insertion part 561A and the right insertion part 561B are biased from the second position toward the first position by an elastic body (not shown). Therefore, in the locked state, the positions of the left insertion part 561A and the right insertion part 561B are held by the biasing force.

[0040] The left restricting part 562A is disposed in front of the seat of the left insertion part 561A. The left restricting part 562A is fixed to the cushion frame 5 and restricts the forward movement of the tip part 251 into which the left insertion part 561A is inserted in front of the seat.

[0041] Further, the left restricting part 562A holds the left insertion part 561A so as to be swingable. The left restricting part 562A constitutes a clip that holds the tip part 251 of the first engaged part 25A together with the left insertion part 561A.

[0042] The right restricting part 562B is disposed in front of the seat of the right insertion part 561B. The right restricting part 562B is fixed to the cushion frame 5 and restricts the forward movement of the tip part 251 into which the right insertion part 561B is inserted in front of the seat.

[0043] Further, the right restricting part 562B holds the right insertion part 561B so as to be swingable. The right restricting part 562B constitutes a clip that holds the tip part 251 of the second engaged part 25B together with the right insertion part 561B.

[0044] The release lever 563 is a member for switching the cushion locking mechanism 56 from the locked state to the unlocked state when the cushion replacement part 21 is detached. The release lever 563 is configured to slide in the seat width direction.

[0045] The link mechanism 564 is configured to displace the left insertion part 561A and the right insertion part 561B from the first position to the second position by the sliding of the release lever 563. The link mechanism 564 is connected to the release lever 563, the left insertion part 561A, and the right insertion part 561B. The link mechanism 564 displaces the left insertion part 561A and the right insertion part 561B simultaneously.

[0046] Hereinafter, with reference to FIG. 5, the configurations of the left insertion portion 561A and the left regulating portion 562A will be described in detail. The same applies to the right insertion portion 561B and the right regulating portion 562B.

[0047] FIG. 5 shows the left insertion portion 561A and the left regulating portion 562A when the cushion locking mechanism 56 is in the locked state. In the locked state, the left insertion portion 561A passes through the tip portion 251 and is present at the first position close to the left regulating portion 562A, restricting the upward movement of the tip portion 251. That is, in the locked state, the mouth of the clip is closed.

[0048] In the locked state, when the release lever 563 is slid, the left insertion portion 561A swings rearward of the seat about the rotation axis P. The rotation axis P of the left insertion portion 561A is provided on the right side of the tip portion 251 and is parallel to the vertical direction. By the swinging, the left insertion portion 561A is displaced to the second position behind and to the right of the seat from the first position and moves away from the tip portion 251. As a result, the cushion locking mechanism 56 is displaced to the unlocked state.

[0049] In this state, by lifting the front portion of the cushion replacement portion 21 upward, the first engaged portion 25A is detached from the cushion locking mechanism 56. After the detachment of the first engaged portion 25A, when the input to the release lever 563 is released, the left insertion portion 561A returns to the first position by the biasing force of the elastic body described above. The same applies to the second engaged portion 25B and the right insertion portion 561B.

[0050] After the detachment of the first engaged portion 25A and the second engaged portion 25B, the cushion replacement portion 21 can be removed from the cushion frame 5 by lifting it upward while swinging the cushion replacement portion 21 around the first rod 54.

[0051] When attaching the cushion replacement portion 21 to the cushion frame 5, first, with the front portion of the cushion replacement portion 21 lifted higher than the rear portion, the first hook 23A and the second hook 23B are engaged with the first rod 54 from behind the seat.

[0052] From this state, by swinging the front part of the cushion replacement part 21 downward around the first rod 54, the tip parts 251 of the first engaged part 25A and the second engaged part 25B are pressed against the left insertion part 561A or the right insertion part 561B at the first position from above.

[0053] As shown in FIG. 5, the left insertion part 561A is provided with a guide part 565 at the insertion end part. The guide part 565 has an outer surface inclined with respect to the insertion direction (that is, downward) of the tip part 251.

[0054] Specifically, the guide part 565 has an inclined surface for guiding the tip part 251 inserted from above toward the front of the seat. When the end part of the tip part 251 is pressed against the guide part 565 of the left insertion part 561A at the first position, the left insertion part 561A is pushed from the first position toward the second position.

[0055] As a result, the mouth of the clip is opened, and the end part of the tip part 251 moves downward beyond the left insertion part 561A. When the end part of the tip part 251 moves downward beyond the left insertion part 561A, the force pushing the left insertion part 561A disappears, so the left insertion part 561A returns to the first position by the biasing force. As a result, the cushion locking mechanism 56 is in a locked state. The same applies to the right insertion part 561B.

[0056] <Back frame> As shown in FIGS. 6A and 6B, the back frame 6 includes a first side frame 61, a second side frame 62, an upper panel 63, a lower panel 64, a middle frame 65, a rod 66, a shell 67, a back locking mechanism 68, and a frame side connector 69.

[0057] The first side frame 61 and the second side frame 62 are each panel-shaped members that extend in the vertical direction and are arranged apart from each other in the seat width direction. The first side frame 61 is arranged on the right side of the second side frame 62.

[0058] The upper panel 63 is disposed across the upper ends of the first side frame 61 and the second side frame 62. The lower panel 64 is disposed across the lower ends of the first side frame 61 and the second side frame 62. A back locking mechanism 68 and a frame-side connector 69 are attached to the lower panel 64.

[0059] The middle frame 65 connects the first side frame 61 and the second side frame 62 in the sheet width direction below the upper panel 63 and above the lower panel 64. The rod 66 is provided in front of the sheet of the upper panel 63. The rod 66 extends in the sheet width direction.

[0060] The shell 67 is a panel attached in front of the sheet of the first side frame 61, the second side frame 62, the upper panel 63, the lower panel 64, and the middle frame 65. The shell 67 has a shape capable of accommodating the back replacement part 31 of the seat back 3.

[0061] The shell 67 has a first recess 671A and a second recess 671B provided side by side in the sheet width direction. Also, the rod 66, the back locking mechanism 68, and the frame-side connector 69 are exposed from an opening provided in the shell 67.

[0062] The back locking mechanism 68 is a device that locks the attachment and detachment of the back replacement part 31 of the seat back 3. The back locking mechanism 68 is attached to the lower panel 64 and the shell 67. The configuration of the back locking mechanism 68 will be described later.

[0063] The frame-side connector 69 is a member detachable from the seat-side connector 36 of the back replacement part 31. A wire harness (not shown) is connected to the frame-side connector 69. The frame-side connector 69 supplies power to and transmits signals to the back replacement part 31.

[0064] <Seat back> The seat back 3 shown in Fig. 1 has a back replacement part 31 that is detachable from the back frame 6.

[0065] As shown in Fig. 7, the back replacement part 31 has a main body 32, a hook 33, a first contact part 34A, a second contact part 34B, a first engaged part 35A, a second engaged part 35B, and a seat-side connector 36.

[0066] The main body 32 is a part that constitutes the backrest surface of the seat back 3. The main body 32 has, for example, a pan formed of resin, a cushioning material formed of, for example, urethane disposed within the pan, and a cover that covers the cushioning material.

[0067] The hook 33 protrudes from the rear surface of the main body 32 toward the back frame 6. Specifically, the hook 33 is formed in a C shape having a groove that opens downward. The hook 33 is disposed near the upper end of the main body 32.

[0068] The first contact part 34A and the second contact part 34B are parts that protrude toward the rear of the seat. The first contact part 34A and the second contact part 34B are disposed below the hook 33 on the rear surface of the main body 32. The first contact part 34A is disposed on the left side of the second contact part 34B.

[0069] As shown in Fig. 8, the hook 33 can be engaged with the rod 66 from above. Also, the first contact part 34A and the second contact part 34B are inserted into the first recess 671A or the second recess 671B (see Fig. 6A) of the shell 67 from the front of the seat. In a state where the back replacement part 31 is attached to the back frame 6, the hook 33 is supported by the rod 66 and the first contact part 34A and the second contact part 34B are supported by the shell 67.

[0070] The first engaged portion 35A and the second engaged portion 35B shown in FIG. 7 are provided at positions shifted in the vertical direction (specifically, downward) with respect to the hook 33. The first engaged portion 35A and the second engaged portion 35B fix the back exchange portion 31 to the back frame 6 by engaging with the back locking mechanism 68.

[0071] The first engaged portion 35A and the second engaged portion 35B are arranged side by side in the sheet width direction. The first engaged portion 35A is arranged on the left side of the second engaged portion 35B. The first engaged portion 35A and the second engaged portion 35B protrude from the lower surface of the main body 32. The first engaged portion 35A and the second engaged portion 35B are arranged below the first contact portion 34A and the second contact portion 34B.

[0072] As shown in FIG. 9, the first engaged portion 35A and the second engaged portion 35B each have a tip portion 351 formed of a wire curved in a U shape. The first engaged portion 35A and the second engaged portion 35B of the back exchange portion 31 have the same configuration as the first engaged portion 25A and the second engaged portion 25B of the cushion exchange portion 21, except that the protruding directions are different.

[0073] The seat side connector 36 shown in FIG. 7 is electrically connected to an electronic device (not shown) housed in the back exchange portion 31 by a wire harness. The seat side connector 36 is connected to the frame side connector 69 in a state where the first engaged portion 35A and the second engaged portion 35B are engaged with the back locking mechanism 68. Examples of the electronic device housed in the back exchange portion 31 include a vibrator that gives vibration to the seat back 3 and a sensor that detects the state of the seat back 3.

[0074] <Back locking mechanism> The back locking mechanism 68 is displaceable between a locked state that restricts the detachment of the first engaged portion 35A and the second engaged portion 35B from the back frame 6 by engaging with the first engaged portion 35A and the second engaged portion 35B, and an unlocked state that allows the detachment of the first engaged portion 35A and the second engaged portion 35B from the back frame 6.

[0075] As shown in FIG. 9, the back lock mechanism 68 includes a left insertion portion 681A, a right insertion portion 681B, a left restricting portion 682A, a right restricting portion 682B, a release lever 683, and a link mechanism 684.

[0076] The back lock mechanism 68 has the same configuration as the cushion lock mechanism 56 of the cushion frame 5, except that the swinging directions of the left insertion portion 681A and the right insertion portion 681B are different. In the back lock mechanism 68, the insertion direction of the tip portion 351 is the rear of the seat. Also, the swinging direction (i.e., the displacement direction at the time of unlocking) of the left insertion portion 681A and the right insertion portion 681B from the first position to the second position is downward.

[0077] In the locked state, when the release lever 683 is slid, the left insertion portion 681A and the right insertion portion 681B are displaced from the first position to the second position and move away from the tip portion 351. As a result, the back lock mechanism 68 is displaced to the unlocked state.

[0078] In this state, by moving the lower part of the back exchange portion 31 forward of the seat, the first engaged portion 35A and the second engaged portion 35B are disengaged from the back lock mechanism 68. At this time, the seat-side connector 36 connected to the frame-side connector 69 is also disengaged.

[0079] After the first engaged portion 35A and the second engaged portion 35B are disengaged, the back exchange portion 31 can be removed from the back frame 6 by lifting it upward while swinging the back exchange portion 31 around the rod 66.

[0080] When attaching the back exchange portion 31 to the back frame 6, first, with the upper part of the back exchange portion 31 shifted rearward of the seat from the lower part, the hook 33 is engaged with the rod 66 from above.

[0081] From this state, by swinging the lower part of the back replacement part 31 around the rod 66 backward of the seat, the tip parts 351 of the first engaged part 35A and the second engaged part 35B respectively move while hitting the left insertion part 681A or the right insertion part 681B in the first position from the front of the seat.

[0082] As a result, the first engaged part 35A and the second engaged part 35B are engaged with the back lock mechanism 68, and the back lock mechanism 68 is in a locked state. Also at this time, the seat-side connector 36 is connected to the frame-side connector 69.

[0083] [1-2. Effect] According to the embodiment described in detail above, the following effects can be obtained. (1a) By switching the cushion lock mechanism 56 or the back lock mechanism 68 to the unlocked state, the cushion replacement part 21 or the back replacement part 31 can be made detachable from the seat frame 4.

[0084] Also, when mounting the cushion replacement part 21 or the back replacement part 31, with the hooks 23A, 23B, 33 engaged with the rods 54, 66, by swinging the cushion replacement part 21 or the back replacement part 31 around the rods 54, 66 as axes, the engaged parts 25A, 25B, 35A, 35B can be guided to the cushion lock mechanism 56 or the back lock mechanism 68. Therefore, the load of the replacement work of a part of the seat 1 can be reduced.

[0085] (1b) By replacing the old cushion replacement part 21 or the back replacement part 31, the seat frame 4 can be reused. As a result, the replacement cost of the seat 1 is reduced. Furthermore, for the seat frame 4 of the same shape, seat cushions 2 or seat backs 3 with different specifications such as design, material, and function can be combined. Therefore, it becomes easy to change the grade of the seat 1.

[0086] (1c) The cushion lock mechanism 56 and the backrest lock mechanism 68 can be configured in a relatively simple structure by the insertion parts 561A, 561B, 681A, and 681A inserted into the tip parts 251 and 351. Therefore, the cost of the seat 1 can be reduced.

[0087] (1d) By the release levers 563 and 683 and the link mechanisms 564 and 684, the unlocking operation for the cushion lock mechanism 56 or the backrest lock mechanism 68 when the cushion replacement part 21 or the backrest replacement part 31 is detached becomes easy. Therefore, the reduction of the load of the replacement work of the cushion replacement part 21 or the backrest replacement part 31 is promoted.

[0088] (1e) By the detaching and attaching mechanism between the seat-side connector 36 and the frame-side connector 69, when an electronic device is mounted on the cushion replacement part 21 or the backrest replacement part 31, the electrical connection of the electronic device can be performed without separately performing the connection work of a wire harness or the like.

[0089] [2. Other Embodiments] As described above, the embodiments of the present disclosure have been described. Needless to say, the present disclosure is not limited to the above embodiments and can take various forms.

[0090] (2a) In the seat of the above embodiment, it is not necessarily required that both the seat cushion and the seat back have a replacement part. That is, only one of the seat cushion and the seat back may have a replacement part.

[0091] (2b) In the seat of the above embodiment, the relative positions of the hook and the engaged part of each of the cushion replacement part and the backrest replacement part are examples. For example, in the cushion replacement part, the hook may be provided at the front part and the engaged part may be provided at the rear part. Also, in the backrest replacement part, the hook may be provided at the lower part and the engaged part may be provided at the upper part.

[0092] (2c) In the seat of the above-described embodiment, the cushion replacement part and the backrest replacement part may each have one or three or more engaged parts. That is, the locking mechanisms of the cushion frame and the backrest frame may each have one or three or more insertion parts.

[0093] (2d) The functions of one component in the above-described embodiment may be distributed among a plurality of components, or the functions of a plurality of components may be integrated into one component. Also, a part of the configuration of the above-described embodiment may be omitted. Further, at least a part of the configuration of the above-described embodiment may be added to, replaced with, etc. the configuration of other above-described embodiments. Note that all aspects included in the technical idea specified from the language described in the claims are embodiments of the present disclosure.

Explanation of Reference Numerals

[0094] 1... Seat, 2... Seat cushion, 3... Seat backrest, 4... Seat frame, 5... Cushion frame, 6... Backrest frame, 21... Cushion replacement part, 23A, 23B... Hooks, 25A, 25B... Engaged parts, 31... Backrest replacement part, 33... Hooks, 35A, 35B... Engaged parts, 36... Seat-side connector, 54, 55... Rods, 56... Lock mechanism for cushion, 66... Rod, 68... Lock mechanism for backrest, 69... Frame-side connector, 251... Tip part, 351... Tip part, 561A... Left insertion part, 561B... Right insertion part, 562A... Left regulating part, 562B... Right regulating part, 563... Release lever, 564... Link mechanism, 565... Guide part, 681A... Left insertion part, 681B... Right insertion part, 682A... Left regulating part, 682B... Right regulating part, 683... Release lever, 684... Link mechanism.

Claims

1. A seat cushion, a seat back, a seat frame that supports the seat cushion and the seat back, comprising: at least one of the seat cushion and the seat back has a replaceable part that is detachable from the seat frame, the replaceable part has a hook protruding toward the seat frame, and a engaged part provided at a position displaced in the front - rear direction or the up - down direction of the seat with respect to the hook, and has a tip portion composed of a wire curved in a U - shape, having: the seat frame has a rod extending in the seat width direction and engageable with the hook, and a locking mechanism displaceable between a locked state that restricts detachment of the engaged part from the seat frame by engaging with the engaged part and an unlocked state that allows detachment of the engaged part from the seat frame, having: an insertion part configured to be displaced between a first position inserted inside the U - shaped tip portion and a second position away from the inside of the tip portion, a restricting part that swingably holds the insertion part and suppresses movement of the tip portion together with the insertion part, having: the insertion part and the restricting part constitute a clip, and the clip is configured such that when the insertion part is in the first position, the mouth of the clip is closed. A seat.

2. The seat according to claim 1, wherein the locking mechanism has a release lever, and a link mechanism configured to displace the insertion part from the first position to the second position by sliding of the release lever. A seat.

3. The seat according to claim 1 or claim 2, wherein the replaceable part has a seat - side connector electrically connected to an electronic device housed in the replaceable part, the seat frame has a frame - side connector detachable from the seat - side connector, and the seat - side connector is connected to the frame - side connector in a state where the engaged part is engaged with the locking mechanism. A seat. ​

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