JP5549197B2 - Seating detection device - Google Patents

Description

  The present invention relates to a seating detection device.

As a type of seating detection device, one shown in Patent Document 1 is known. As shown in FIGS. 2 and 5 of Patent Document 1, in the seating detection device, the pressure sensitive switch 3 (detection unit of the load detection device) is formed in a film shape, and the seating surface of the seat cushion 5 5a
It is a size that covers almost the whole area. The pressure sensitive switch 3 is connected to the pad 51 and the skin 53 of the seating surface 5a.
Between the two.

In the seating detection device described in Patent Document 1, since the shape of the detection unit depends on the design of the seat, the detection unit has a different shape for each seat (for each vehicle type), and thus the detection unit cannot be shared. There was a problem.

On the other hand, as shown in Patent Document 2, the seating detection device is connected to the cushion member 14.
What was provided in the lower surface of this is known. As shown in FIGS. 3 and 4 of Patent Document 2, in the seating detection device, the detection body 13 (the detection portion of the load detection device) is formed in a bag shape,
The seat cushion 1 has a size that covers a wide range, from at least one third of the seating surface of the seat cushion 1 to the entire area. The detection body 13 is provided between the frame 12 and the cushion member 14.

JP 09-315199 A JP 2005-257296 A

According to the seating detection device described in Patent Document 2, since the shape of the detection unit can be determined without depending on the design of the seat, the common use of the detection unit of the load detection device can be achieved. However, there is also a demand for reliably supporting the detection body 13 on the frame 12, and further improvement is necessary to dispose the load detection device under the cushion member.

The present invention was made to solve the above-described problems, and in the seating detection device,
An object is to appropriately and surely dispose the load detection device under the cushion member while sharing the load detection device.

In order to solve the above-described problem, the structural feature of the invention according to claim 1 is that one or more detection units that are disposed below the cushion member of the cushion portion of the vehicle seat and detect load information, and the detection A load detection device having an output section that outputs detected load information connected to the section, one or more mounting sections that are mounted on the support member that supports the cushion member, and the support member via the mounting section. And a holder having at least a pressure receiving portion that is disposed below the detection portion and receives pressure from the cushion member via at least the detection portion, and the load detection device includes the detection portion and the output portion. It has a conducting part to be connected, and is composed of a sheet-like membrane switch. The holder is constructed separately from the load detection device and connected to the output part of the load detection device. The kuta has a detachable fixing part, and the fixing part is provided in a part different from the surface receiving the pressure of the pressure receiving part, and the load detection device is installed in the holder with the conductive part elastically deformed. It is that.

A structural feature of the invention according to claim 2 is that, in claim 1, the holder is an integral structure in which the pressure receiving portion and the attachment portion are integrally formed.
Further, the structural feature of the invention according to claim 3 is that, in claim 1 or claim 2, a spacer formed in a plate shape with an elastic material is interposed between the detection portion and the pressure receiving portion. It is.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the holder includes a connecting portion that connects the pressure receiving portion and the fixing portion, and the connecting portion is elastically deformable. It is that it has a bent part.

A structural feature of the invention according to claim 5 is that, in any one of claims 1 to 4 , the attachment portion is detachably attached to the support member.

In the invention according to claim 1 configured as described above, the holder is attached to a support member that supports the cushion member by one or more attachment portions. Further, the pressure receiving portion of the holder supported by the support member via the mounting portion is disposed below the detection portion of the load detection device and receives pressure from the cushion member via at least the detection portion. According to this, when an occupant sits on the cushion portion of the vehicle seat, the load is transmitted downward through the cushion member and is received by the holder supported by the support member. At this time, the detection portion of the load detection device is supported by the pressure receiving portion of the holder that is positioned relative to the support member, and is pressed between the pressure receiving portion and the cushion member to which the load is applied. Therefore, it is possible to reliably and accurately detect information (load information) related to the load transmitted to the detection unit. Therefore, the load detection device can be properly and reliably disposed under the cushion member. Furthermore, since the shape of the detection unit can be determined without depending on the design of the sheet, the common detection unit of the load detection device can be achieved.
Furthermore, the load detection device is composed of a sheet-like membrane switch. Thereby, the load detection apparatus which consists of a membrane switch can be supported by the support member which supports a cushion member via a holder appropriately and reliably. Further, the holder is configured separately from the load detection device, and has a fixing portion to which a connector connected to the output portion of the load detection device can be attached and detached. Thereby, since the output part of a load detection apparatus can be fixed to a holder reliably, assembly property can be improved. In addition to this, the shape and number of detection portions of the load detection device can be easily changed, and specifications such as sensitivity of the seating detection device can be easily changed.

In the invention according to claim 2 configured as described above, in claim 1, the holder is an integral structure in which the pressure receiving portion and the attachment portion are integrally formed. Thereby, the number of parts can be reduced and the cost can be reduced. Moreover, it becomes possible to attach to various types of seats only by changing the shape of the holder, which is an integral structure, without changing the shape of the load detection device.
In the invention which concerns on Claim 3 comprised as mentioned above, the spacer formed in the plate shape with the elastic material is interposed between the detection part and the pressure receiving part in Claim 1 or Claim 2. . Thereby, since the detection part is pinched | interposed between the cushion member and the spacer, the sensitivity of the detection part can be adjusted by changing the material and shape of the spacer.

In the invention according to Claim 4 configured as described above, in any one of Claims 1 to 3 , the holder includes a connecting portion that connects the pressure receiving portion and the fixing portion, and the connecting portion is elastically deformed. Possible bends. As a result, when attaching the output part of the membrane switch to the fixed part, the bent part is bent so that the pressure receiving part does not get in the way, and after the bending, the bent part is released and the detection part of the membrane switch is moved to the pressure receiving part. Abut. Therefore, the membrane switch can be easily and reliably attached to the holder.

In the invention according to claim 5 configured as described above, in any one of claims 1 to 4 , the attachment portion is detachably attached to the support member. Thereby, the assembly | attachment property at the time of assembling | attaching a seating detection apparatus to a support member can be improved.

1 is a perspective view showing an overall configuration of a vehicle seat to which a seating detection device according to the present invention is applied. (A) is an enlarged sectional view of a portion including the seat detection device for a vehicle seat shown in FIG. 1, (b) is an enlarged sectional view around the detection unit in an off state, and (c) is It is an expanded sectional view around a detection part of an ON state. It is a perspective view which shows the seating detection apparatus attached to the vehicle seat shown in FIG. It is a perspective view which shows the seating detection apparatus shown in FIG. It is a perspective view which shows the load detection apparatus shown in FIG. 3, FIG. (A) is the perspective view which looked at the holder shown in FIG. 3, FIG. 4 from diagonally upward, (b) is the perspective view which looked at the holder shown in FIG. 3, FIG. 4 from diagonally downward. It is a figure which shows the assembly process of a seating detection apparatus, (a) shows the holder single body of an expansion | extension state, (b) shows the holder single body bent, (c) is a load detection apparatus in the holder of a bending state (D) shows the seating detection device in the extended state. When a load is added, it is a figure used for description which a load propagates through a cushion member.

Hereinafter, an embodiment in which a seating detection device according to the present invention is applied to a vehicle seat will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the vehicle seat 10, FIG. 2 is an enlarged cross-sectional view of a portion including the seating detection device 30, and FIG. 3 shows the seating detection device 30 attached to the vehicle seat. FIG. 4 is a perspective view showing the seating detection device 30.

The vehicle seat 10 includes first and second seat track mechanisms 11 and 12, first and second lower arms 13 and 14, a back frame 16, a front cushion frame 17, and an S spring 18.
The connecting shaft 19 and the cushion member 21 are provided.

The first seat track mechanism 11 is disposed on the outer side of the seat, and includes a first lower rail 11a provided on the floor side, and a first upper rail 11b slidably engaged with the first lower rail 11a. Become. Similarly, the second seat track mechanism 12 is disposed on the inner side of the seat, and a second lower rail 12a provided on the floor side, and a second upper rail that slidably engages with the second lower rail 12a. 12b.

On the 1st and 2nd upper rails 11b and 12b, the 1st and 2nd lower arms 13 and 14 as a side frame are provided through the lift mechanism using a parallel link.
The operation handle 15 of the lift mechanism shifts the locked state in which the raising and lowering of the first and second lower arms 13 and 14 is prohibited to the unlocked state in which the raising and lowering of the first and second lower arms 13 and 14 is permitted. Is.

A back frame 16 is tiltably attached between the rear portions of the first and second lower arms 13 and 14. The operation handle 16a of the reclining device that adjusts the tilt angle of the back frame 16 is for shifting the locked state in which the tilt of the back frame 16 is prohibited to the unlocked state in which the tilt of the back frame 16 is permitted. .

A front cushion frame 17 that swings around a pin 17a by a front tilt mechanism is provided at the front of the first and second lower arms 13 and 14 arranged side by side on the floor side. The operation handle 17b of the front tilt mechanism provided via the brake mechanism is configured to swing the front cushion frame 17 in the vertical direction around the pin 17a by rotating.

A plurality of S springs 18 are hooked between the connecting shaft 19 and the front cushion frame 17 for transmitting the movement of the lift mechanism on the first seat track mechanism 11 side to the lift mechanism on the second seat track mechanism 12 side. It has been stopped. The S spring 18 is a support member that supports the cushion member 21 from below.

As shown in FIGS. 1 and 2, a seating detection device 30 is provided below the cushion member 21.
Is attached to and supported by the S spring 18. The surface of the cushion member 21 is covered with a skin 22 such as leather, fiber, or moquette.

As shown in FIGS. 3 and 4, the seating detection device 30 includes a load detection device 40 and a holder 50.
As shown mainly in FIG. 5, the load detection device 40 includes a membrane switch 41 and a connector 42 formed in a film shape (sheet shape). The membrane switch 41 includes a detection unit 41a and an output unit 41b. The detection part 41a is arrange | positioned under the cushion member 21 of the cushion part 20 of the vehicle seat 10, and detects load information.

As shown in FIG. 2B, the detection unit 41a includes an upper film 41a1 and a lower film 41.
a2 and a separation holding portion 41a3. The upper film 41a1 has an upper surface (outer surface).
Is in contact with the lower surface of the cushion member 21, and a contact point 41a4 is provided at the center of the inner surface. The lower film 41a2 has a lower surface (outer surface) in contact with the upper surface of the spacer 60 and a contact 41 in the center of the inner surface.
a5 is provided. The separation holding part 41a3 is interposed between the upper film 41a1 and the lower film 41a2 along the outer peripheral edge. The hardness of the separation holding portion 41a3 is set to a value larger than the hardness of the cushion member 21 and the spacer 60. These members are formed of an elastic material. The contacts 41a4 and 41a5 are arranged to face each other with a space.

In the detection unit 41a configured as described above, when a load is applied to the cushion member 21,
When the hardness of the cushion member 21 and the spacer 60 is equal, as shown in FIG.
The upper film 41a1 bends downward due to the load from the cushion member 21, and the lower film 41a2 bends upward due to the reaction force from the spacer 60, so that the contact 41a4 and the contact 41a5 come into contact with each other. Thereby, since the detection part 41a turns on, load information can be detected.
At this time, the amount of bending of the upper and lower films 41a1 and 41a2 is the same. Further, since the load is concentrated on the upper film 41a1, the sensitivity is lowered.

When the hardness of the cushion member 21 is greater than the hardness of the spacer 60, the amount of bending of the lower film 41a2 is larger than the amount of bending of the upper film 41a1. When the hardness of the cushion member 21 is smaller than the hardness of the spacer 60, the amount of bending of the lower film 41a2 is smaller than the amount of bending of the upper film 41a1.

As described above, in this embodiment, the load information is not an absolute load value, but indicates a state that is smaller than a predetermined load, that is, an off state, while a large load is applied. That state, that is, the ON state is shown. It is preferable that one or more detectors 41a are formed. In the present embodiment, only one detection unit 41a is formed.

The output part 41b is connected to the detection part 41a via a flexible conduction part 41c. The output part 41b outputs the load information detected by the detection part 41a. That is, an output electrode is formed on the output portion 41b. The connector 42 is connected to the output unit 41b. In this embodiment, the output unit 41b and the connector 42 are “output unit” described in the claims.
Is configured. The connector 42 may not be provided. In this case, the output unit 41b
The “output unit” described in the claims is configured only from the above. The connector 42 is
It attaches to the fixing | fixed part 52c mentioned later so that attachment or detachment is possible. That is, the connector 42 is provided with a fixing portion engaging portion 42a that is detachably engaged with the fixing portion 52c.

As shown in FIGS. 3, 4, and 6, the holder 50 has the load detection device 40 as a support member S.
It is a plate-like member that is supported by the spring 18 and formed in a square shape. The holder 50 is
First and second plate members 51 and 52 arranged in parallel to face each other, and first and second connection members 53 and 54 for connecting the first and second plate members 51 and 52 are provided.

The first plate-like member 51 is a member formed in an elongated plate shape, and both ends thereof are mounted on the upper portions of the two opposing portions 18a1 and 18a2 of the S spring 18a. Part 18
a1 is a front portion, and a portion 18a2 is a rear portion.

At one end (front end) of the first plate-like member 51, a first locking portion 51a that is detachably locked to the front portion 18a1 of the S spring 18a is formed. The 1st latching | locking part 51a has a downward opening, and the internal diameter is formed in the slightly smaller diameter than the S spring 18a. Since the 1st latching | locking part 51a is externally fitted by S spring 18a, it is radial direction (front-back direction of a vehicle) with respect to S spring 18a.
However, relative movement is possible in the axial direction of the S spring 18a (the left-right direction of the vehicle).

The other end (rear end) of the first plate member 51 is formed with a first engagement portion 51b that is detachably engaged with the rear portion 18a2 of the S spring 18a. The first engaging portion 51b has a front-facing opening (
It is formed in the shape of a long and narrow groove having a horizontal opening), and its inner diameter is S spring 18.
The diameter is slightly larger than or substantially the same as a. The first engaging portion 51b can move relative to the S spring 18a in the radial direction (the longitudinal direction of the vehicle), and the axial direction of the S spring 18a (
Relative movement in the left and right direction of the vehicle is possible.
In addition, the 1st latching | locking part 51a and the 1st engaging part 51b support S the cushion member 21.
It is an attachment part attached to the spring 18 (18a).

According to the first plate-like member 51 configured as described above, when the occupant is seated, the S spring 18a.
Even if the front portion 18a1 and the rear portion 18a2 expand, the expansion is not hindered, and the first plate-like member 51 can be reliably supported on the S spring 18a.

The first plate member 51 is formed with a pressure receiving portion 51c. The pressure receiving portion 51c is the first
The cushion member is supported by the S spring 18 (18a, 18b) via the locking portion 51a and the first engagement portion 51b and is disposed below the detection portion 41a of the load detection device 40 and at least via the detection portion 41a. The pressure from 21 is received. The pressure receiving portion 51 c is formed in a concave shape between both ends of the first plate-like member 51.

The pressure receiving portion 51c is provided with a spacer 60. The spacer 60 is bonded to the upper surface of the pressure receiving portion 51c with an adhesive, a double-sided tape, or the like. The spacer 60 is to be interposed between the detection unit 41a and the pressure receiving unit 51c of the load detection device 40. Spacer 6
Reference numeral 0 denotes a thin plate-like member formed of an elastic material such as a cushion material, a rubber material, or a cloth material (such as an unknown cloth material or felt). In the present embodiment, the spacer 60 is formed in a rectangular shape, is accommodated in the recess, and is wider than the detection unit 41a.

In addition, the sensitivity of the detection part 41a can be changed by changing the shape of the spacer 60 by providing a protrusion or a recess, or by changing the hardness by changing the material. If the protrusion is provided on the spacer 60, the sensitivity of the detection unit 41a is increased, and conversely if the recess is provided, the sensitivity is decreased. When the sensitivity is changed by changing the hardness, the sensitivity depends on a relative hardness difference between the cushion member 21 and the spacer 60. Specifically, the sensitivity increases as the relative hardness difference increases, and the sensitivity tends to decrease as the hardness difference decreases. Specifically, cushion member 2
By setting the relative hardness difference between 1 and the spacer 60, the load or the reaction force tends to concentrate on the portion corresponding to the detection unit 41a in the member having the lower hardness, so that the amount of bending at the portion increases. The contact 41a4 and the contact 41a5 are easy to contact. Therefore, the cushion member 2
The higher the relative hardness difference between 1 and the spacer 60, the higher the sensitivity of the detection unit 41a. However, even if the hardness difference is large, the sensitivity decreases when the spacer hardness is remarkably high or when the spacer hardness is remarkably low (for example, when the hardness is not different from the holder 50 (when remarkably high).
Or a case where a recess is provided in the region corresponding to the film portion of the detection portion 41a in the spacer 60 (when it is extremely low).

The second plate member 52 is a member formed in an elongated plate shape, and is set to the same length as the first plate member 51. Both ends of the second plate-like member 52 are mounted on the upper portions of the two opposing portions 18b1 and 18b2 of the S spring 18b (which is an S spring adjacent to the S spring 18a). The part 18b1 is a front part, and the part 18b2 is a rear part.

At one end (front end) of the second plate-like member 52, a second locking portion 52a is formed that is detachably locked to the front portion 18b1 of the S spring 18b. The second locking portion 52a is a first locking portion 51a.
It is formed in the same way. The other end (rear end) of the second plate-like member 52 is formed with a second engagement portion 52b that is detachably engaged with the rear portion 18b2 of the S spring 18b. Second engaging portion 52
b is formed similarly to the 1st engaging part 51b. In addition, the 2nd latching | locking part 52a and the 2nd engaging part 52b are attachment parts attached to S spring 18 (18b) which supports the cushion member 21. As shown in FIG.

According to the second plate-like member 52 configured as described above, when the occupant is seated, the S spring 18b.
Even if the front portion 18b1 and the rear portion 18b2 expand, the expansion is not hindered, and the second plate-like member 52 can be reliably supported on the S spring 18b.

The second plate-like member 52 is formed with a fixing portion 52c to which the connector 42 to which the output portion 41b of the load detection device 40 is connected is fixed. The fixing portion 52 is a second plate-like member 52.
Is formed on the lower surface thereof. The fixing portion 52 is configured such that a fixing portion engaging portion 42a of the connector 42 is detachably attached. In addition, you may make it comprise so that the fixing | fixed part 52 may not be provided.

The first connecting member 53 is a plate-like member that connects the front end of the first plate-like member 51 and the front end of the second plate-like member 52. The first connecting member 53 includes a bent portion 53a that can be elastically deformed. The second connecting member 54 is a plate-like member that connects the rear end portion of the first plate-like member 51 and the rear end portion of the second plate-like member 52. The second connecting member 54 includes a bent portion 54a that can be elastically deformed. The bent portions 53a and 54a are in a bent state (see FIG. 7B) and an extended state (see FIG. 7A).
It is preferable to be configured so as to be positioned and fixed to.

Next, the assembly of the seating detection device 30 configured as described above will be described with reference to FIG. First, the holder 50 in which the spacer 60 is attached to the upper surface of the pressure receiving portion 51c is prepared. At this time, the holder 50 is positioned in the extended state (see FIG. 7A).

Next, the holder 50 is bent at the bent portions 53a and 54a and positioned in a bent state (FIG. 7).
(See (b)). As a result, the pressure receiving portion 51c that has been positioned substantially linearly on the fixed portion 52c can be displaced, so that the load detecting device 51c can be easily moved without being obstructed when the next load detecting device 40 is attached. Can be attached to.

Then, by engaging the fixing portion 52 a of the load detection device 40 with the fixing portion 52 c of the holder 50 in the bent state, the connector 42 of the load detection device 40 is connected to the fixing portion 5 of the holder 50.
Fix to 2c. Therefore, the load detection device 40 is fixed to the holder 50.

Then, the holder 50 to which the load detection device 40 is fixed is deformed from the bent state to the extended state and positioned in the extended state (see FIG. 7D). At this time, the detection unit 4 of the load detection device 40.
1 a is positioned on the upper surface of the spacer 60.

Furthermore, the assembly | attachment to the S spring 18 of the seating detection apparatus 30 assembled in this way is demonstrated. First, the first and second engaging portions 51b and 52b are moved to the S springs 18a and 18b (18a2
, 18b2). At this time, although the first and second engaging portions 51b and 52b are engaged with the S springs 18a and 18b, the holder 50 can be rotated about the S springs 18a and 18b as long as it does not come off. The S springs 18a and 18b can be slid as guide pins.

Next, the holder 50 is rotated or slid to lock the first and second locking portions 51a and 52a with the S springs 18a and 18b (18a1 and 18b1).

Further, load propagation in the cushion member 21 will be described with reference to FIG. When the object A is placed on the seating surface 20a of the cushion portion 20 and a load is applied, the load spreads from the contact range S1 where the object A contacts and propagates almost directly below the cushion member 21 (FIG. 8). To propagate within the range indicated by the broken line). At this time, the load propagates to the lower surface of the cushion member 21 in a range S2 wider than the contact range S1. Within this propagation range S2, the detection unit 4 of the load detection device 40
If 1a is installed, a load can be detected. In the present embodiment, a membrane switch 41 is used as the load detection device 40. In this case, it can be detected that a load is applied only when a load equal to or higher than the load (the predetermined load) that turns on the membrane switch 41 is applied. As described above, even when the detection unit 41a is provided on the lower surface of the cushion member 21, it is possible to reliably detect a load state when a load is applied to the seating surface.

Further, when a local load is applied, it propagates only to the surface layer portion and does not propagate to the lower surface of the cushion member 21. For this reason, it can suppress detecting erroneously the load added by the corner | angular part of a load.

As is clear from the above description, in the seating detection device according to the present embodiment, the holder 50 includes one or more attachment portions (first and second locking portions 51a and 52a, first and second engagements). It is attached to the support member (S spring 18) which supports the cushion member 21 by the parts 51b and 52b). Further, the pressure receiving portion 51c of the holder 50 supported by the support member (S spring 18) via the attachment portions (first and second locking portions 51a, 52a, first and second engaging portions 51b, 52b) The pressure sensor is disposed below the detection portion 41a of the load detection device 40 and receives pressure from the cushion member 21 through at least the detection portion 41a. According to this, when an occupant sits on the cushion portion 20 of the vehicle seat 10, the load is transmitted downward through the cushion member 21 and is received by the holder 50 supported by the support member (S spring 18). It becomes. At this time, the detection portion 41a of the load detection device 40 is supported by the pressure receiving portion 51c of the holder 50 that is positioned relative to the support member (S spring 18), and a load is applied to the pressure receiving portion 51c. Since it is pressed between the cushion member 21 and the cushion member 21, the information (load information) relating to the load transmitted to the detection unit 41a can be detected reliably and accurately. Therefore, the load detection device 40 can be appropriately and reliably disposed under the cushion member 21. Furthermore, since the shape of the detection part 41a can be determined without depending on the design of the sheet, the load detection device 40
The common detection unit 41a can be achieved.

Furthermore, since the detection part 41a of the load detection apparatus 40 can be arrange | positioned in the lower surface of the cushion member 21 away from the seating surface of the cushion part 20, it improves riding comfort, without causing the foreign material feeling at the time of sitting. Can do.

Furthermore, since the arrangement | positioning restrictions of the detection part 41a of the load detection apparatus 40 are not received, the freedom degree of the design of a sheet | seat can be improved. Further, it is possible to suppress the influence of the skin material, the skin tension, the heater and the air conditioning, and to exhibit a stable detection performance.

Further, when the detection unit is provided on the seat seating surface, it is necessary to dispose the seating surface in a relatively wide range in the detection range, which leads to an increase in the size of the seating detection device and an increase in cost.
However, in this embodiment, since the propagation range S2 of the load propagating to the lower surface of the cushion member 21, that is, the detectable range is widened, the detectable range is widened as compared with the case where it is provided on the seating surface. Can be reduced, and as a result, downsizing of the device,
Cost can be reduced.

The holder 50 includes a pressure receiving portion 51c and an attachment portion (first and second locking portions 51a, 52a,
The first and second engaging portions 51b and 52b) are an integral structure integrally formed. Thereby, the number of parts can be reduced and the cost can be reduced. Moreover, it becomes possible to attach to various types of seats only by changing the shape of the holder 50 that is an integral structure without changing the shape of the load detection device 40.

The holder 50 further includes a fixing portion 52c to which the connector 42 (or the output portion 41b) of the load detection device 40 is fixed. Thereby, since the connector 42 (or output part 41b) of the load detection apparatus 40 can be reliably fixed to the holder 50, assembly property can be improved.

Moreover, the connector 42 (or output part 41b) of the load detection apparatus 40 is detachably fixed to the fixing part 52c. Thereby, the shape and number of the detection parts 41a of the load detection device 40 can be easily changed, and specifications such as the sensitivity of the seating detection device 30 can be easily changed.

Moreover, the output part 41b is attached with a detachable connector 42 to the fixing part 52c.
Thereby, the assembly property of the seating detection apparatus 30 can be improved.

The load detection device 40 includes a sheet-like membrane switch 41. As a result, the load detection device 40 including the membrane switch 41 can be properly and reliably supported by the support member (S spring 18) that supports the cushion member 21 via the holder 50.

The holder 50 includes a connecting portion (first and second) that connects the pressure receiving portion 51c and the fixing portion 52c.
The connecting portions 53, 54) are provided, and the connecting portions (first and second connecting members 53, 54) are provided with bent portions 53a, 54a that can be elastically deformed. Thereby, when attaching the output part 41b of the membrane switch 41 to the fixing | fixed part 52c, the bending parts 53a and 54a are bent and the pressure receiving part 5 is bent.
1c does not get in the way, and after the attachment, the bent portions 53a and 54a are released from bending, and the detection portion 41a of the membrane switch 41 is brought into contact with the pressure receiving portion 51c. Therefore, the membrane switch 41 can be easily and reliably attached to the holder 50.

Further, the mounting portions (first and second locking portions 51a and 52a, first and second engaging portions 51b,
52b) is detachably attached to the support member (S spring 18). Thereby, the assembly | attachment property at the time of assembling | attaching the seating detection apparatus 30 to a support member (S spring 18) can be improved.

In the above-described embodiment, a membrane switch is used as the load detection device 40. However, a stroke sensor may be used, and a detection unit using a piezoelectric element (such as a piezoelectric element) is provided. You may make it use the load detection apparatus which has a detection circuit which processes the detection signal from a detection part, and outputs it as an output value.

In the case of a stroke sensor, the entire stroke sensor body may be placed on the pressure receiving portion 51c, and the wire harness connector connected to the body may be fixed to the fixing portion 52c. Also in the case of a load detection device having a piezoelectric element, the pressure receiving portion 51c together with the main body in which the piezoelectric element and the detection circuit are integrated.
What is necessary is just to fix the connector of the wire harness connected to the main body to the fixing | fixed part 52c.

Instead of the connector 42 of the load detection device 40, a transmitter (transceiver) may be provided. Information detected by the detection unit 41a is transmitted to the control device via the transmitter. This transmitter can be attached to and detached from the holder 50 in the same manner as the connector 42.

Moreover, in each embodiment mentioned above, the holder 50 is the 1st plate-shaped member 51, and the pressure receiving part 51c.
The second plate-like member 52 is provided with the fixing portion 52c. However, the first plate-like member 51 is provided with the pressure receiving portion 51c and the fixing portion 52c, and the second plate-like member 52, the first and second couplings are provided. The members 53 and 54 may be deleted. In this case, the fixing part 52c may be provided on the lower surface of the pressure receiving part 51c.

Moreover, in each embodiment mentioned above, the 1st and 2nd connection member 53 from the holder 50,
54 may be deleted. Further, one of the first and second connecting members 53 and 54 may be deleted (for example, the shape is substantially U-shaped), and one of the first and second connecting members 53 and 54 is deleted and the other is the first. You may make it offset to the center vicinity site | part of the 1 plate-like member 51 and the 2nd plate-like member 52 (For example, as a shape, it is substantially H-shaped.). That is, the holder 50
The shape is not limited to a substantially square shape.

Furthermore, in each embodiment mentioned above, you may make it delete the attachment part provided in the 1st plate-shaped member 51. FIG.

Moreover, in each embodiment mentioned above, although S spring 18 was used as a support member,
A cushion pan may be used. In this case, the mounting portion is constituted by an engagement pin (or engagement hole), and an engagement hole (or engagement pin) that engages with the engagement pin (or engagement hole) is formed in the cushion pan. do it. An opening for the connector 42 of the load detection device 40 is preferably provided. This is for connecting a wire harness to the connector 42.

DESCRIPTION OF SYMBOLS 10 ... Vehicle seat, 11, 12 ... 1st and 2nd seat track mechanism, 13, 14 ...
1st and 2nd lower arm, 16 ... back frame, 17 ... front cushion frame, 1
DESCRIPTION OF SYMBOLS 8 ... S spring (support member), 20 ... Cushion part, 21 ... Cushion member, 30 ... Seating detection apparatus, 40 ... Load detection apparatus, 41 ... Membrane switch, 41a ... Detection part, 41b ... Output part, 42 ... Connector, DESCRIPTION OF SYMBOLS 50 ... Holder, 51, 52 ... 1st and 2nd plate-shaped member, 51a ... 1st latching | locking part (attachment part), 51b ... 1st engagement part (attachment part), 51c ... Pressure receiving part, 52a ... 2nd Locking portion (attachment portion), 52b ... second engagement portion (attachment portion), 52c ... fixing portion, 53,54 ... first and second connecting members, 53a, 54a ... bending portion, 60 ... spacer.

Claims (5)

Load detection having one or more detection units that are arranged below a cushion member of a cushion part of a vehicle seat and that detects load information, and an output unit that is connected to the detection unit and outputs the detected load information Equipment,
One or more attachment portions attached to a support member that supports the cushion member, and the cushion is supported by the support member via the attachment portion and disposed below the detection portion, and at least via the detection portion. A holder having at least a pressure receiving portion that receives pressure from the member ,
The load detection device has a conduction part that connects the detection part and the output part,
And it consists of a sheet-like membrane switch,
The holder is configured separately from the load detection device, and has a fixing portion to which a connector connected to the output portion of the load detection device is detachable,
The fixing portion is provided in a portion different from the surface receiving the pressure of the pressure receiving portion,
The seating detection device , wherein the load detection device is installed on the holder in a state where the conducting portion is elastically deformed .   2. The seating detection device according to claim 1, wherein the holder is an integral structure in which the pressure receiving portion and the attachment portion are integrally formed.   The seating detection device according to claim 1, wherein a spacer formed in a plate shape with an elastic material is interposed between the detection unit and the pressure receiving unit. The holder according to any one of claims 1 to 3 , wherein the holder includes a connecting portion that connects the pressure receiving portion and the fixing portion, and the connecting portion includes a bent portion that is elastically deformable. A seating detection device. 5. The seating detection device according to claim 1 , wherein the attachment portion is detachably attached to the support member. 6.

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