JP7104329B2 - Sensor placement structure on the seat and vehicle seat - Google Patents

Description

The present invention relates to a structure for arranging a sensor on a seat and a vehicle seat .

A sensor such as a position sensor that detects whether or not the occupant is seated on the seat may be arranged on the seat (see Patent Document 1).
Such a sensor detects that the occupant is seated in the seat, for example, in the seatbelt reminder technology that issues a warning when the occupant is seated in the seat but is not wearing the seatbelt. Used to do.

Japanese Unexamined Patent Publication No. 2014-400911

By the way, conventionally, when such a sensor is arranged on a seat, it may be arranged between the cushion pad and the skin of the seat cushion of the seat, for example, as described in Patent Document 1.
However, when the sensor is placed between the cushion pad and the epidermis, that is, just below the epidermis, something hits the buttocks and thighs of the occupant seated on the seat through the epidermis of the seat. May be felt and the seating feeling may deteriorate.

The present invention has been made in view of the above circumstances, and provides a structure for arranging the sensor on the seat and a seat for a vehicle, which can improve the seating feeling of the occupant when the sensor is arranged on the seat. The purpose is.

In order to solve the above problems, the invention according to claim 1 comprises a seat cushion frame, a cushion pad arranged on the seat cushion frame, and a plate-shaped member provided under the cushion pad. It is a structure of arranging the sensor on the seat provided with
The plate-shaped member is attached to the seat cushion frame, and the plate-shaped member is attached to the seat cushion frame.
A recess is provided in a flat region corresponding to the upper surface of the plate-shaped member, and the sensor is arranged in the recess.
The plate-shaped member is provided with an opening continuously in the recess, and a harness for electrically connecting the sensor and an external device is inserted through the opening.
The opening is an opening through which a duct for supplying air to the ventilation path formed in the cushion pad can be passed.
It is characterized by that.
The invention according to claim 2 is the structure for arranging the sensor on the sheet according to claim 1.
The sensor is placed in the recess while being fixed to the mounting bracket.
The mounting bracket is characterized in that it is mounted in the recess in a state of being engaged with an engaging portion provided in the recess.

The invention according to claim 3 is the structure for arranging the sensor on the sheet according to claim 2.
The plate-shaped member is provided with an opening.
The mounting bracket has a bent portion that bends at the opening, and further has a bracket-side engaging portion that protrudes from the end of the bent portion and engages with the lower surface side of the plate-shaped member. It is characterized by.

The invention according to claim 4 is the structure for arranging the sensor on the sheet according to claim 2 or 3.
The mounting bracket is mounted in the recess by engaging the bracket-side engaging portion with the lower surface side of the plate-shaped member and engaging with the claw portion projecting from the upper surface of the recess. It is characterized by being.

The invention according to claim 5 is the structure for arranging the sensor on the sheet according to any one of claims 2 to 4.
The upper surface of the recess is provided with ribs that support the left and right portions of the mounting bracket.

The invention according to claim 6 is the structure for arranging the sensor on the sheet according to any one of claims 2 to 5.
The mounting bracket has a guide portion of a harness that electrically connects the sensor and an external device, and the guide portion is inclined downward.

The invention according to claim 7 is the structure for arranging the sensor on the sheet according to any one of claims 2 to 6.
The mounting bracket is characterized by having a notch in the outer peripheral portion.

The invention according to claim 8 is the structure for arranging the sensor on the sheet according to claim 7 .
The notch is characterized in that it is formed at a position corresponding to a raised portion of a wire inserted into the plate-shaped member.

The invention according to claim 9 is the structure for arranging the sensor on the sheet according to any one of claims 2 to 8.
A claw portion formed in a claw shape as the engaging portion is projected on the upper surface of the recess.
It is characterized by that.

The invention according to claim 10 is the structure for arranging the sensor on the sheet according to claim 9.
A second engaging portion is provided on the upper surface of the recess adjacent to the claw portion.
It is characterized by that.

The invention according to claim 11 is the structure for arranging the sensor on the sheet according to claim 10 .
A plurality of the openings are provided in the plate-shaped member, and the harness is inserted into the opening through which the duct is not inserted.

The invention according to claim 12 is the structure for arranging the sensor on the sheet according to any one of claims 1 to 11 .
The recess in which the sensor is arranged is provided at a position other than the position directly below the hollow portion formed in the cushion pad.

The invention according to claim 13
A vehicle seat comprising the structure for arranging the sensor on the seat according to any one of claims 1 to 12 .

According to the invention of claim 1, the plate-shaped member is provided with an opening continuously in the recess, and a harness for electrically connecting the sensor and the external device is inserted through the opening. Therefore, the harness can be easily handled as compared with the case where there is a distance between the recess and the opening. Further, if there is a distance between the recess and the opening, the harness will be sandwiched between the plate-shaped member and the cushion pad, and the harness and the plate-shaped member or the cushion pad will rub against each other, damaging the harness. However, if the recess and the opening are continuous, such rubbing is less likely to occur, and damage or disconnection of the harness is less likely to occur.
Further, since the opening is an opening through which a duct for supplying air can pass through the ventilation path formed in the cushion pad, it is already formed without providing a new opening in the plate-shaped member. An opening for a duct can be used, and a harness can be inserted through the opening.
According to the second aspect of the invention, in the structure of arranging the sensor on the seat including the cushion pad and the plate-shaped member provided on the lower side of the cushion pad, a recess is provided on the upper surface of the plate-shaped member. Because the sensor is placed in the recess, unlike the conventional case where the sensor is placed between the cushion pad and the skin, it is between the buttocks and thighs of the occupant and the sensor. Since the cushion pad is inserted in the seat, it is difficult to feel that the sensor is hitting the buttocks and thighs of the occupant seated on the seat, and the seating feeling of the occupant is improved as compared with the conventional case. ..
Further, if the sensor is simply arranged on the upper surface of the plate-shaped member, the cushion pad rises by the amount of the sensor, which may give a feeling of strangeness to the occupant and deteriorate the seating feeling. However, the invention according to claim 1. Since the sensor is arranged in the recess provided on the upper surface of the plate-shaped member, it is possible to improve the seating feeling without giving the above-mentioned discomfort.

Further, since the sensor is arranged in the recess while being fixed to the mounting bracket, it is sufficient to fix the sensor to the mounting bracket and then attach the mounting bracket to the recess, which facilitates the placement of the sensor in the recess. .. In addition, when the occupant sits on the seat and the load of the occupant is applied to the sensor via the cushion pad, the mounting bracket absorbs a part of the load, so that the occupant reaches the sensor as compared with the case where the sensor is directly mounted in the recess. The effect of the load is reduced.

Further, since the mounting bracket is mounted in the recess in a state of being engaged with the engaging portion provided in the recess, the mounting bracket can be easily mounted in the recess, and the engaging portion facilitates the positioning of the mounting bracket for mounting. The bracket is less likely to shift in the front-back direction or the left-right direction.

According to the invention of claim 3 , the plate-shaped member is provided with an opening, the mounting bracket has a bent portion that bends at the opening, and a plate that protrudes from the end of the bent portion. Since it has a bracket-side engaging portion that engages with the lower surface side of the shaped member, the bent portion makes it easier to accurately position the mounting bracket mainly in the left-right direction, and the mounting bracket is displaced in the left-right direction. It becomes difficult and the rigidity of the mounting bracket itself can be improved. In addition, since the mounting bracket is provided with a bracket-side engaging portion, the bracket-side engaging portion makes it easier to accurately position the mounting bracket in the vertical direction, and the mounting bracket is less likely to be displaced in the vertical direction. Become.

According to the invention of claim 4 , the mounting bracket is recessed by engaging the bracket-side engaging portion with the lower surface side of the plate-shaped member and engaging with the claw portion projecting from the upper surface of the recess. Since it is mounted inside, it becomes easier to position the mounting bracket more accurately, and the mounting bracket is less likely to be displaced in the front-rear direction, the vertical direction, or the like.

According to the invention of claim 5 , since ribs for supporting both ends of the mounting bracket are provided on the upper surface of the recess, the main body of the mounting bracket slightly floats from the recess in the portions other than the ribs. When the load of the occupant is applied to the sensor, the mounting bracket can easily absorb a part of the load. Further, since the rigidity of the recess itself can be improved by providing the rib, the recess is less likely to be broken.

According to the invention of claim 6 , the mounting bracket has a guide portion of the harness that electrically connects the sensor and the external device, and the guide portion is inclined downward, so that the harness guides the harness. Since the harness is guided by the part and gently inclined downward and supported by the guide part from below, the harness supported by the guide part is less likely to vibrate with respect to the sensor even if the seat vibrates. This makes it difficult for the harness to be damaged or broken.

According to the invention of claim 7 , since the mounting bracket has a notch on the outer peripheral portion, a load is applied to the sensor and the mounting bracket, and a force that causes deformation of the mounting bracket is applied. Even if it is applied, the notch absorbs the deformation of the mounting bracket, so that when the force is not applied to the mounting bracket, the deformation generated in the mounting bracket can easily be restored, and the deformation of the mounting bracket is less likely to remain.

According to the invention of claim 8 , since the notch is formed at a position corresponding to the raised portion of the wire inserted into the plate-shaped member, the mounting bracket and the raised portion of the wire may interfere with each other. It is possible to suppress the damage to the mounting bracket, the plate-shaped member, and the like.

According to the invention of claim 9, since the claw portion formed in a claw shape as an engaging portion is projected on the upper surface of the concave portion, the mounting bracket can be accurately positioned mainly in the front-rear direction. In addition to being easily broken, by confirming that the claws protrude upward from the engaging holes of the mounting bracket when mounting the mounting bracket in the recess, the mounting bracket and the claws are properly engaged with each other. It makes it easier to check that the mounting bracket is in place and that the mounting bracket is properly positioned in the recess.

According to the invention of claim 10, since the upper surface of the recess is provided with the second engaging portion adjacent to the claw portion, the claw portion and the second engaging portion are provided when the mounting bracket is attached to the recess. The peripheral portion of the engaging hole of the mounting bracket is sandwiched between the engaging portion of 2 and the mounting bracket is more accurately positioned in the front-rear direction, and the mounting bracket is less likely to be displaced in the front-rear direction. ..

According to the invention of claim 11 , since a plurality of openings are provided in the plate-shaped member and the harness is inserted into the opening through which the duct is not inserted, the harness and the duct interfere with each other. However, since the harness and the duct do not rub against each other, damage or disconnection of the harness is less likely to occur.

According to the invention of claim 12 , since the recess in which the sensor is arranged is provided at a position other than the position directly below the hollow portion formed in the cushion pad, the cushion is cushioned when the occupant sits on the seat. Since the load applied to the pad is not absorbed by the hollow part formed in the cushion pad and is applied straight to the sensor, the pressure applied to the sensor increases accurately, and the sensor indicates that the occupant is seated on the seat. It becomes easier to detect.

It is a perspective view which shows the sheet. It is a perspective view which shows the ventilation path and the like formed in the cushion pad of a seat cushion. It is a perspective view which shows the sensor and the like arranged in the recess of a seat cushion frame and a pan frame (plate-shaped member). It is a perspective view which shows the sensor and the mounting bracket. It is an enlarged view which shows the concave part and the like formed in the pan frame (plate-like member). It is a perspective view which shows the state which attached the mounting bracket to the recess. FIG. 5 is a perspective view showing a state of FIG. 8 as viewed from the back surface side of the pan frame (plate-shaped member). It is a perspective view which shows the state which attached the mounting bracket which attached the sensor etc. to the recess. It is a figure which shows the state which the bracket side engaging part formed in the bent part of a mounting bracket is engaged with the lower surface side of a pan frame (plate-like member). It is sectional drawing which shows the state which the sensor arranged in the recess of a pan frame (plate-like member) comes into contact with the lower surface of a cushion pad. It is sectional drawing which shows the state which shows the state which the sensor is arranged at the position just below the hollow part formed in the cushion pad. It is a perspective view which shows an example of the seat cushion frame provided with a wire. It is a figure which shows the modification of the plate-like member or the like provided so that the wire may be inserted.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. do not have.

The seat 10 shown in FIG. 1 is provided on a vehicle such as an automobile, and is seated by an occupant such as a driver. As shown in FIG. 1, the seat 10 is provided on the seat cushion 11 that supports the buttocks and thighs of the occupant, the seat back 14 whose lower end is supported by the seat cushion 11 and serves as a backrest, and the seat back 14. A headrest 16 for supporting the head of the occupant is provided. In addition, an auxiliary support portion such as a necklace, an armrest, a footrest, or an ottoman may be provided.

As shown in FIG. 2, the seat cushion 11 includes a seat cushion frame 17 (see FIG. 3 described later) as a skeleton, a cushion pad 12 provided on the seat cushion frame 17, and a seat cushion frame 17 and a cushion pad 12. It is mainly composed of a skin 13 (not shown in FIG. 2; see FIG. 1), which covers the surface of the seat and constitutes the surface of the sheet.

In the present embodiment, the seat cushion 11 is provided with a ventilation passage 30 for air (hot air or cold air) between the cushion pad 12 and the skin 13, but the ventilation passage 30 and the like are not necessarily provided. May be good.
Specifically, as shown in FIG. 2, the cushion pad 12 is provided with a vent passage recess 30A forming a part of the vent passage 30. Further, a recess (not shown) forming the remaining portion of the ventilation path 30 is provided at a position of the cover member 12A corresponding to the recess 30A for the ventilation path, and a predetermined portion of the cushion pad 12 of the cover member 12A. The ventilation path 30 is formed by fitting it into the air passage 30.

Further, a plurality of punching holes are formed in the cover member 12A, and these punching holes are used as air outlets 30C of the ventilation passage 30. The cushion pad 12 including the cover member 12A is covered with a breathable skin 13 at least in a portion corresponding to the air outlet 30C.
Then, the air sent from the blower (not shown) is sent into the ventilation passage 30 through the through hole 30B, and the air flowing through the ventilation passage 30 is blown out toward the occupant from the ventilation port 30C of the ventilation passage 30. It has become so.

The seat cushion 11 of the present embodiment is provided with a seat cushion frame 17 under the cushion pad 12. As shown in FIG. 3, the seat cushion frame 17 is a connecting member 17B that connects a pair of left and right side frames 17A and a front end portion and a rear end portion of each side frame 17A (the connecting member 17B on the front end portion side is a pan frame). It is mainly composed of a pan frame 18 erected between each side frame 17A and each connecting member 17B.
In the present embodiment, the case where the pan frame 18 functions as a plate-shaped member provided under the cushion pad 12 will be described, but the case where the plate-shaped member is configured as a form other than the pan frame 18 will be described. , Will be described later with a modified example.

A recess 20 is provided on the upper surface of the pan frame 18 (plate-shaped member), and the sensor 1 is arranged in the recess 20. The sensor 1 can be, for example, a position sensor capable of detecting whether or not the occupant is seated on the seat 10.
Although it is possible to mount the sensor 1 directly in the recess 20, in the present embodiment, the sensor 1 is fixed to the mounting bracket 2, and the mounting bracket 2 to which the sensor 1 is fixed is arranged in the recess 20. ing.

When the sensor 1 is directly attached to the recess 20 of the pan frame 18, it is necessary to screw the sensor 1 arranged in the recess 20, but the attachment is not always easy. However, as described above, if the sensor 1 is fixed to the mounting bracket 2 and the sensor 1 is configured to be mounted in the recess 20, the sensor 1 can be easily fixed to the mounting bracket 2 and the mounting bracket 2 can be fixed. Since it is easy to attach the sensor 1 to the recess 20, it becomes easy to arrange the sensor 1 in the recess 20.

Further, in the state where the seat 10 is assembled, the cushion pad 12 is arranged on the upper side of the sensor 1. Then, when the occupant sits on the seat 10, the load of the occupant is applied to the sensor 1 via the cushion pad 12. At that time, if the sensor 1 is directly attached to the recess 20 of the pan frame 18, the total load thereof may be applied to the sensor 1 and the sensor 1 may be adversely affected. If the sensor 1 is attached to the recess 20 via the mounting bracket 2, the mounting bracket 2 absorbs a part of the load of the occupant when the load is applied to the sensor 1, so that the sensor 1 is directly attached to the recess 20 as compared with the case where the sensor 1 is directly attached to the recess 20. , The influence of the load of the occupant on the sensor 1 is reduced.

Hereinafter, the configurations of the recess 20 and the mounting bracket 2 will be described in detail. FIG. 4 is a perspective view showing the sensor 1 and the mounting bracket 2, and FIG. 5 is an enlarged view showing a recess 20 and the like formed in the pan frame 18 (plate-shaped member).
The flat plate-shaped main body 2a of the mounting bracket 2 is provided with a locking hole 2b in which the locking portion 1a of the sensor 1 is locked, and the screw portion 1b of the sensor 1 (not shown in FIG. 4 will be described later). Holes 2c into which (see FIG. 7) are inserted are provided. Then, the locking portion 1a of the sensor 1 is inserted into the locking hole 2b of the mounting bracket 2 to lock the sensor 1, and the screw portion 1b inserted into the hole 2c of the mounting bracket 2 in that state is placed on the back side of the mounting bracket 2 ( That is, the sensor 1 can be easily attached to the attachment bracket 2 by screwing from the lower side).

A harness 1A for electrically connecting the sensor 1 and an external device (not shown. A power supply device, a signal processing device from the sensor 1, etc.) is connected to the sensor 1, and the mounting bracket 2 is connected to the harness 1A. It has a guide portion 2d of. Since the guide portion 2d is gently inclined downward with respect to the main body portion 2a of the mounting bracket 2, the harness 1A is guided by the guide portion 2d and is gently inclined downward.
If the guide portion 2d is not formed on the mounting bracket 2, the harness 1A will hang downward due to its own weight at the portion connected to the sensor 1, but in that state, when the vehicle vibrates and the seat 10 vibrates, the harness Since 1A vibrates relatively large with respect to the sensor 1, the harness 1A is likely to be damaged or broken. On the other hand, by supporting the harness 1A in a state of being gently inclined downward by the guide portion 2d of the mounting bracket 2 as described above, the harness 1A supported by the guide portion 2d is the sensor 1 even if the seat 10 vibrates. Since it is relatively difficult to vibrate with respect to the harness 1A, it is difficult for the harness 1A to be damaged or broken.

Further, the main body 2a of the mounting bracket 2 is formed with a notch 2e on the outer peripheral portion.
By providing the notch 2e on the outer peripheral portion of the mounting bracket 2 in this way, a load is applied to the sensor 1 and the mounting bracket 2 as described above, and the main body 2a of the mounting bracket 2 is deformed. Even when a force is applied, the notch 2e absorbs the deformation of the main body 2a of the mounting bracket 2. Therefore, when no force is applied to the mounting bracket 2, the deformation generated in the main body 2a of the mounting bracket 2 is likely to be restored, and the deformation is less likely to remain in the mounting bracket 2.

On the other hand, the recess 20 of the pan frame 18 is provided with an engaging portion for engaging with the mounting bracket 2 and mounting the mounting bracket 2 in the recess 20.
Specifically, as shown in FIG. 5, a claw portion 20a formed in a claw shape is projected as an engaging portion on the upper surface of the recess 20. Further, the main body 2a of the mounting bracket 2 is provided with an engaging hole 2f that engages with the claw portion 20a, and when the mounting bracket 2 to which the sensor 1 is mounted is mounted in the recess 20, FIG. As shown, the claw portion 20a of the recess 20 and the engagement hole 2f of the mounting bracket 2 are engaged with each other. In FIG. 6, the sensor 1 and the harness 1A are not shown so that the engagement between the claw portion 20a and the engagement hole 2f can be understood.

As described above, in the present embodiment, the same applies to the second engaging portion 20b and the like described later, but the engaging portion (claw portion 20a) provided with the mounting bracket 2 (engaging hole 2f) in the recess 20. Since the mounting bracket 2 can be attached to the recess 20 by engaging with, the mounting bracket 2 can be easily attached to the recess 20.
Further, the mounting bracket 2 is attached to the recess 20 in a state where the claw portion 20a of the recess 20 and the engaging hole 2f of the mounting bracket 2 are engaged, so that the claw portion 20a mainly positions the mounting bracket 2 in the front-rear direction. Will be easier to do accurately. Further, the claw portion 20a can also contribute to the positioning of the mounting bracket 2 in the left-right direction. Further, when the mounting bracket 2 is attached to the recess 20, it is confirmed that the claw portion 20a protrudes upward from the engaging hole 2f of the mounting bracket 2, so that the engaging hole 2f of the mounting bracket 2 and the claw It is easy to confirm that the portion 20a is properly engaged and that the mounting bracket 2 is arranged at an appropriate position in the recess 20.

In addition, in FIGS. 3 to 5, the case where the sensor 1 is arranged in the recess 20 in the state where the harness 1A extends to the left side of the sensor 1 is shown, but the state where the harness 1A extends to the right side of the sensor 1. In some cases, the sensor 1 may be arranged in the recess 20. In the present embodiment, as shown in FIG. 5, the claw portion 20a is provided only on the rear side of the recess 20, but in this way, the direction of the harness 1A, that is, the direction of the guide portion 2d is both leftward and rightward. The engagement hole 2f of the mounting bracket 2 is provided not only on the rear side but also on the front side in the state shown in FIG.

Further, as shown in FIG. 5, a second engaging portion 20b is provided on the upper surface of the recess 20 adjacent to the claw portion 20a. Then, when the mounting bracket 2 is mounted in the recess 20, as shown in FIG. 6, the peripheral portion α of the engaging hole 2f of the mounting bracket 2 is sandwiched between the claw portion 20a and the second engaging portion 20b.
In this way, when the mounting bracket 2 to which the sensor 1 is mounted is mounted in the recess 20 of the pan frame 18, the claw portion 20a of the recess 20 and the second engaging portion 20b form an engaging hole 2f of the mounting bracket 2. By sandwiching the peripheral edge portion α, the mounting bracket 2 can be more accurately positioned in the front-rear direction. Then, the mounting bracket 2 is less likely to be displaced in the front-rear direction.

Further, in the present embodiment, as shown in FIG. 5, the left and right ends of the recess 20 are formed so as to be slightly higher than the upper surface of the recess 20, and these portions are the mounting bracket 2 (see FIG. 6). ), Both ends (left and right portions in the present embodiment) of the main body 2a are supported by ribs 20c from below.
When the rib 20c is provided in this way, the main body 2a of the mounting bracket 2 is slightly lifted from the recess 20 in the portion other than the rib 20c. Therefore, as described above, when the load of the occupant is applied to the sensor 1. In addition, the mounting bracket 2 easily absorbs a part of the load. Further, since the rigidity of the recess 20 itself can be improved by providing the rib 20c as compared with the case where the rib 20c is not provided, the load of the occupant is applied when the occupant sits on the seat 1, and the pan frame 18 is released. The recess 20 is less likely to be destroyed when it is deformed so as to become.

In addition, for example, it is also possible to improve the rigidity of the recess 20 by forming ribs on the lower surface side of the recess 20.
Further, the recess 20 is formed with a relief portion 20d as an opening, and when the mounting bracket 2 is mounted in the recess 20, as shown in FIG. 7, the sensor 1 projects downward from the lower surface of the mounting bracket 2. Each relief portion 20d is formed so that the locking portion 1a, the screw portion 1b, and the like are located within the relief portion 20d. In the present embodiment, when the mounting bracket 2 is mounted in the recess 20, the locking portion 1a, the screw portion 1b, and the like of the sensor 1 protruding downward from the lower surface of the mounting bracket 2 are recessed 20. It is designed to avoid interfering with.

In the present embodiment, a structure for engaging with the recess 20 of the pan frame 18 is also provided on the mounting bracket 2 side. Specifically, as shown in FIG. 4, the mounting bracket 2 has bent portions 2g bent downward at the left and right ends of the main body portion 2a, respectively. In the state shown in FIG. 4, the bent portion 2g on the left side of the mounting bracket 2 is divided into two in the front and rear because the guide portion 2d is provided between them, but the bent portion 2g on the right side is It is formed in the shape of a single flat plate (see FIG. 7 and FIG. 9 described later).
Then, when the mounting bracket 2 is mounted on the recess 20, these bent portions 2g sandwich the rib 20c (see FIG. 5) of the recess 20 from the left and right. In this way, the bent portion 2g makes it easier to accurately position the mounting bracket 2 in the left-right direction, and makes it difficult for the mounting bracket 2 to be displaced in the left-right direction. Further, the rigidity of the mounting bracket 2 itself can be improved by providing the mounting bracket 2 with a bent portion 2g and bending the mounting bracket 2.

Further, the bent portion 2g of the mounting bracket 2 is provided with a bracket-side engaging portion 2h so as to project forward from the front end portion and rearward from the rear end portion of the bent portion 2g.
Then, as shown in FIG. 9, when the mounting bracket 2 is mounted in the recess 20 of the pan frame 18, the bracket-side engaging portion 2h of the mounting bracket 2 is on the lower surface side of the pan frame 18 (see β in FIG. 9 in the drawing. R indicates a rib provided on the lower surface of the pan frame 18). With this configuration, the bracket-side engaging portion 2h makes it easier to accurately position the mounting bracket 2 in the vertical direction, and makes it difficult for the mounting bracket 2 to be displaced in the vertical direction.

In the present embodiment, by attaching the mounting bracket 2 to which the sensor 1 is attached to the recess 20 of the pan frame 18 as described above, the sensor 1 is attached to the pan frame 18 via the mounting bracket 2 as shown in FIG. It can be accurately and surely attached to the recess 20 of the above.

By the way, as shown in FIGS. 3 and 5, when the pan frame 18 is provided with the opening 18A, the harness 1A is placed under the seat 10 by inserting the harness 1A through the opening 18A. Can be guided.
It is also possible to newly form an opening 18A for inserting the harness 1A in the pan frame 18. Further, although the description will be described below with reference to FIGS. 3 and 5, the present invention is not limited to the case where two openings 18A are provided as shown in FIG. 3 and the like, and there is only one opening 18A. However, three or more may be provided.
Further, the openings 18A do not have to be provided on the left and right sides of the recess 20 as shown in FIG. 3, and may be provided on the front and back of the recess 20. Further, the opening 18A may be a notch (that is, a shape notched inward from the end of the pan frame 18) or the like, and is not limited to a hole as shown in FIG. 3 or the like. Further, the opening 18A does not have to be an opening for the duct 19 described below.

In the seat 10 of the present embodiment, as shown in FIG. 2, a ventilation path 30 is provided between the cushion pad 12 of the seat cushion 11 and the skin 13, and a blower provided under the pan frame 18 is provided. The air sent from (not shown) is sent into the ventilation passage 30 through the through hole 30B, and the air flowing through the ventilation passage 30 is blown out from the ventilation port 30C of the ventilation passage 30 toward the occupants. There is. An opening 18A is provided as a through hole through which a duct 19 (see FIG. 1) for supplying the through hole 30B from the blower can be passed.
Therefore, by using this opening 18A as an opening through which the harness 1A of the sensor 1 is inserted, the already formed opening 18A for the duct can be provided without newly providing the opening 18A in the pan frame 18. It can be used, and the harness 1A can be inserted through the opening 18A.

Further, although the blower is provided on the lower side of the pan frame 18, since it is usually provided on either the left or right side of the seat 10, the position where the duct 19 penetrates the pan frame 18 is also adjusted to the position of the blower from the center. It can be left-sided or right-sided. Therefore, in the sheet 10 of the present embodiment, as shown in FIGS. 3 and 5, the opening 18A through which the duct 19 can pass is located on the left side of the center of the pan frame 18 so that any of these cases can be dealt with. There are two places, one on the right and one on the right.
In the present embodiment, the portion between the two openings 18A is a recess, and the recess 20 of the pan frame 18 described above is formed in this portion.

In the present embodiment, the opening 18A is continuously provided in the recess 20 of the pan frame 18 in this way. That is, the sensor 1 and the mounting bracket 2 are attached to the portion between the plurality of openings 18A provided close to each other (the portion between the plurality of openings 18A that bridges the front and rear portions of the pan frame 18). The recess 20 to be arranged is provided.
Generally, when a plurality of openings 18A are provided in close proximity to each other, the portion between them becomes less rigid and easily deformed. However, as described above, in the present embodiment, the recess formed in the portion is formed. Since the rigidity of the recess 20 itself is improved by providing the rib 20c in the 20, such deformation is less likely to occur.

Further, since the harness 1A of the sensor 1 attached to the recess 20 of the pan frame 18 via the mounting bracket 2 is inserted through the opening 18A continuously provided in the recess 20, the recess 20 and the opening The harness 1A can be easily handled as compared with the case where there is a distance from the 18A. Further, when there is a distance between the recess 20 and the opening 18A, the harness 1A is sandwiched between the pan frame 18 and the cushion pad 12 (see FIG. 2 and FIG. 10 to be described later), and the harness 1A and the harness 1A are sandwiched. There is a possibility that the harness 1A may be damaged or broken due to rubbing against the pan frame 18 and the cushion pad 12, but if the recess 20 and the opening 18A are continuous as in the present embodiment, the above Such rubbing is less likely to occur, and damage or disconnection of the harness 1A is less likely to occur.

Further, as shown in FIG. 3, the duct 19 is in a state of being inserted into any one of the plurality of openings 18A. Therefore, if the harness 1A is configured to be inserted through the opening 18A through which the duct 19 is not inserted, the harness 1A and the duct 19 do not interfere with each other, and the harness 1A and the duct 19 do not rub against each other. Damage or disconnection of 1A is less likely to occur.
The harness 1A may be configured to be inserted through the opening 18A through which the duct 19 is inserted.

In the present embodiment, as shown in FIG. 10, the duct 19 is passed through the opening 18A of the pan frame 18 and inserted into the through hole 30B formed in the cushion pad 12 from below, but the duct 19 The cushion pad 12 is not lifted by the insertion of the sensor 1 into the through hole 30B, so that the upper surface of the sensor 1 is kept in contact with the lower surface of the cushion pad 12.
Further, when the occupant sits on the seat 10, a load is applied to the cushion pad 12 from above, the cushion pad 12 is compressed, and the pressure applied from the cushion pad 12 to the sensor 1 increases. Therefore, the sensor 1 can reliably detect when the occupant is seated on the seat 10.

In addition, in FIG. 10, the case where the upper surface of the pan frame 18 and the upper surface of the sensor 1 are flush with each other and the cushion pad 12 having a flat bottom is placed on the upper surface of the pan frame 18 is shown. Can be arranged so as to be located above the upper surface of the pan frame 18, and a recess may be provided at a position corresponding to the sensor 1 of the cushion pad 12.

Further, as shown in FIG. 11, if the recess 20 of the pan frame 18 is provided at a position directly below the hollow portion such as the ventilation passage 30 formed in the cushion pad 12, when the occupant sits on the seat 10. , The portion of the cushion pad 12 on the upper side of the hollow portion bends downward to absorb the load, and the load is less likely to be transmitted to the lower portion of the hollow portion, so that the pressure applied to the sensor 1 is less likely to increase. It may be difficult for the sensor 1 to detect that the occupant is seated on the seat 10.
Therefore, it is desirable that the recess 20 in which the sensor 1 is arranged is provided at a position other than the position directly below the hollow portion such as the air passage 30 formed in the cushion pad 12. With this configuration, the load applied to the cushion pad 12 when the occupant sits on the seat 10 is applied straight to the sensor 1. Therefore, the pressure applied to the sensor 1 is accurately increased, and it becomes easy for the sensor 1 to detect that the occupant is seated on the seat 10.

As described above, according to the arrangement structure of the sensor 1 on the seat 10 according to the present embodiment, the sensor 1 is provided on the upper surface of the plate-shaped member (pan frame 18) provided on the lower side of the cushion pad 12. It is arranged in the recess 20 (see FIG. 10).
In the conventional structure of arranging the sensor on the seat, as described above, since the sensor 1 is arranged between the cushion pad 12 and the skin 13 (that is, just below the skin), the buttocks and the large size of the occupant seated on the seat 10 It was felt that something was hitting the thigh through the skin 13 of the seat 10, and the seating feeling was sometimes deteriorated.

However, in the arrangement structure of the sensor 1 on the seat 10 according to the present embodiment, since the cushion pad 12 is interposed between the buttocks and thighs of the occupant and the sensor 1 as described above, the occupant seated on the seat 10 It becomes difficult to feel that the sensor 1 hits the buttocks and thighs of the occupant, and the seating feeling of the occupant is improved as compared with the conventional case.

Further, if the sensor 1 is simply arranged on the upper surface of the plate-shaped member (pan frame 18), the cushion pad 12 rises by the amount of the sensor 1, giving the occupant a sense of discomfort, and the seating feeling may deteriorate. In the structure for arranging the sensor 1 on the sheet 10 according to the present embodiment, as described above, the recess 20 is provided on the upper surface of the plate-shaped member (pan frame 18), and the sensor 1 is arranged therein. It is possible to improve the sitting feeling without giving a feeling of strangeness.

[Modification example]
In the above embodiment, the case where the pan frame 18 provided under the cushion pad 12 is used as the plate-shaped member has been described. However, the structure of the seat cushion frame 17 on the lower side of the cushion pad 12 (not shown in FIG. 12) is composed of, for example, a pan frame 18 and a wire 17C (also referred to as an S spring) as shown in FIG. Alternatively, there are cases where the pan frame 18 is not provided and only the wire 17C is used.
In such a case, the wire 17C can be configured to have a plate-shaped member.

At that time, for example, as shown in FIG. 13, a plate-shaped member 25 can be provided in the portion of the wire 17C so as to insert the wire 17C. Then, similarly to the above embodiment, the recess 26 is provided on the upper surface of the plate-shaped member 25, and the sensor 1 can be arranged in the recess 26 in a state of being fixed to the mounting bracket 2. Is.
Although the description of the engaging portion (see FIGS. 4 and 5) for mounting the mounting bracket 2 in the recess 26 is omitted in FIG. 13, the mounting bracket 2 can be properly mounted in the recess 26. Engagement portions and the like are appropriately formed on the recess 26 side and the mounting bracket 2 side. Although the description of the harness 1A and the like of the sensor 1 is also omitted, it is possible to provide the guide portion 2d (see FIG. 4 and the like) and the like on the mounting bracket 2 in this case as well. In addition, the configuration of the recess 20 and the mounting bracket 2 according to the above embodiment can be appropriately applied to the recess 26 and the mounting bracket 2 in this modification.

In the modified example shown in FIG. 13, since the wire 17C is inserted into the plate-shaped member 25, the portion where the wire 17C is inserted is raised more than the other portion in the recess 26 of the plate-shaped member 25. (See the dashed line in the figure). Therefore, the notch 2e (see FIG. 4) of the mounting bracket 2 in the above embodiment can be formed at a position corresponding to the raised portion of the wire 17C inserted into the plate-shaped member 25 as shown in FIG. Is.
With this configuration, in addition to the effects described in the above embodiment, the mounting bracket 2 has a notch 2e in the raised portion of the wire 17C, so that the mounting bracket 2 and the raised portion of the wire 17C interfere with each other. This can be suppressed, and damage to the mounting bracket 2, the plate-shaped member 25, and the like can be suppressed.

Needless to say, the present invention is not limited to the above-described embodiments and modifications, and can be appropriately modified as long as the gist of the present invention is not deviated.

1 Sensor 1A Harness 2 Mounting bracket 2d Guide part 2e Notch 2g Bending part 2h Bracket side engaging part 10 Seat (vehicle seat)
12 Cushion pad
17 Seat cushion frame
17C wire 18 pan frame (plate-shaped member)
18A Opening 19 Duct 20 Recess 20a Claw (engaging part)
20b Second engaging part (engaging part)
20c Rib 25 Plate-shaped member 26 Recess 30 Ventilation path (hollow part)
β Lower surface side of plate-shaped member

Claims (13)

A structure in which a sensor is arranged on a seat including a seat cushion frame, a cushion pad arranged on the seat cushion frame, and a plate-shaped member provided under the cushion pad.
The plate-shaped member is attached to the seat cushion frame, and the plate-shaped member is attached to the seat cushion frame.
A recess is provided in a flat region corresponding to the upper surface of the plate-shaped member, and the sensor is arranged in the recess.Ori
The plate-shaped member is provided with an opening continuously in the recess, and a harness for electrically connecting the sensor and an external device is inserted through the opening.
The opening is an opening through which a duct for supplying air to the ventilation path formed in the cushion pad can be passed.
The structure of the sensor placement on the seat is characterized by this. The sensor is placed in the recess while being fixed to the mounting bracket.
The structure for arranging a sensor on a seat according to claim 1, wherein the mounting bracket is mounted in the recess in a state of being engaged with an engaging portion provided in the recess. The plate-shaped member is provided with an opening.
The mounting bracket has a bent portion that bends at the opening, and further has a bracket-side engaging portion that protrudes from the end of the bent portion and engages with the lower surface side of the plate-shaped member. 2. The structure for arranging the sensor on the sheet according to claim 2. The mounting bracket is mounted in the recess by engaging the bracket-side engaging portion with the lower surface side of the plate-shaped member and engaging with the claw portion projecting from the upper surface of the recess. The structure for arranging the sensor on the sheet according to claim 2 or 3, wherein the sensor is arranged. The arrangement of the sensor on the seat according to any one of claims 2 to 4, wherein ribs for supporting the left and right portions of the mounting bracket are provided on the upper surface of the recess. structure. The mounting bracket has a guide portion of a harness that electrically connects the sensor and an external device, and the guide portion is inclined downward, according to claims 2 to 5. Arrangement structure of the sensor on the sheet according to any one item. The structure for arranging a sensor on a sheet according to any one of claims 2 to 6, wherein the mounting bracket has a notch in an outer peripheral portion. The structure for arranging a sensor on a sheet according to claim 7, wherein the notch is formed at a position corresponding to a raised portion of a wire inserted into the plate-shaped member. The sensor for a sheet according to any one of claims 2 to 8 , wherein a claw portion formed in a claw shape as the engaging portion is projected on the upper surface of the recess. Arrangement structure of. The structure for arranging a sensor on a sheet according to claim 9 , wherein a second engaging portion is provided adjacent to the claw portion on the upper surface of the recess. The sensor for a sheet according to claim 10, wherein a plurality of the openings are provided in the plate-shaped member, and the harness is inserted through the opening through which the duct is not inserted. Arrangement structure. The recess according to any one of claims 1 to 11, wherein the recess in which the sensor is arranged is provided at a position other than a position directly below the hollow portion formed in the cushion pad. Sensor placement structure on the seat. A vehicle seat comprising the structure for arranging the sensor on the seat according to any one of claims 1 to 12 .

Images