JP7409957B2 - child seat - Google Patents

Description

The present invention relates to a child seat.

BACKGROUND ART Conventionally, in child seats in which a base member and a seat main body are rotatably provided, a back surface locking mechanism has been known that locks a base member and a back surface of a seat main body. Examples of such child seats include JP-A No. 2000-108739 (Patent Document 1) and JP-A No. 2003-291698 (Patent Document 2).

Patent Document 1 discloses that a lock pin is provided in the upright portion of the base to be inserted into a hole provided on the back surface of the seating portion. It is disclosed that a lock handle is used to switch the lock pin between a locked state and an unlocked state.

Patent Document 2 discloses that an engagement hook is provided on the back surface of the seat body and engages with a locking portion of a backrest support portion. It is disclosed that when the seat body rotates, the engagement hook comes into contact with an engagement guide section provided on the seat base, and is gradually raised to a height where it can engage with the locking section. It is disclosed that by engaging an engagement hook provided on the seat body with a locking portion provided on the seat base, it is possible to suppress the impact when a vehicle collides.

Japanese Patent Application Publication No. 2000-108739 Japanese Patent Application Publication No. 2003-291698

In the child seat disclosed in Patent Document 1, in order to lock and unlock the lock pin, it is necessary to operate the lock handle, which may cause malfunction. Since the locking portion of Patent Document 2 is always exposed from the seat base, it gets in the way of a seated child and poses a safety problem.

The present invention has been made to solve the above problems, and its purpose is to provide a child seat with excellent safety and good operability.

For this purpose, the child seat according to the present invention includes a base member that includes a base part and an upright part rising upward from the end of the base part, and that is mounted on the seat of an automobile with the upright part located on the rear side; A seat body that is rotatably mounted on a pedestal and can be switched between a forward facing state where the back of the backrest faces the upright part and a rearward facing state where the front of the backrest faces the upright part, and the seat body relative to the base member. The rotational position fixing mechanism fixes the rotational position of the seat body, and prevents the seat body in the forward-facing state from falling forward. a locking member that is displaceable between a locking member that is provided on the upright portion, projects from the upright portion toward the seat body, and engages with the locking member in the first position; and a locking member that does not protrude from the upright portion. The mechanism includes a locking member that can take the stowed position and a locking member that switches the position of the locking member depending on the rotational position of the seat body. An interlocking mechanism is provided that brings the locking member to the protruding position and brings the locked member to the storage position when the seat body is in a position other than the forward facing position.

Preferably, the locked member has an engagement hole extending in the vertical direction, and the locking member includes an engagement pin that is vertically displaceable between a first position and a second position, The engagement pin fits into the engagement hole when in the upper first position.

Preferably, the interlocking mechanism includes a motion transmission member having one end in contact with the outer peripheral surface of the rotating portion of the seat body and the other end in contact with the locked member.

Preferably, the outer peripheral surface of the rotating portion of the seat body forms cam surfaces having different distances from the rotation axis.

Preferably, the interlocking mechanism preferably includes a biasing member that biases one end of the motion transmission member into contact with the cam surface.

Preferably, the motion transmission member has a central portion supported by the base member via a shaft so as to be capable of see-saw movement.

Preferably, the rotational position fixing mechanism includes a lock hole provided in the base member, a lock pin provided in the seat body so as to be movable up and down and engages with the lock hole when in the lower position, and the lock pin and the locking member. and a locking interlocking member that operably connects the two.

Preferably, the locking interlocking member is displaceable into a forward position and a rearward position, such that when the locking interlocking member is in the forward position, the locking pin is brought to a lower position and the locking member is brought to an upper position. It is configured.

Preferably, an operating section for moving the locking operation interlocking member to a forward position is provided.

According to the present invention, it is possible to provide a child seat with excellent safety and good operability.

FIG. 3 is a schematic diagram of the child seat according to the present embodiment, in which (A) shows a state in which the forward fall prevention mechanism and the rotation position fixing mechanism are locked, and (B) shows the state in which the forward fall prevention mechanism and the rotation position fixing mechanism are locked. Indicates a released state. FIG. 3 is a partial perspective view showing a part of the base member of the child seat according to the present embodiment, in which (A) shows a state in which the locked member of the forward tilting prevention mechanism is in a protruding position, and (B) shows a state in which the locked member of the forward tilting prevention mechanism is in a protruding position; The locked member of the prevention mechanism is shown in the storage position. 3A and 3B are partial sectional views corresponding to FIG. 2, in which (A) shows a state in which the locked member of the forward fall prevention mechanism is in the protruding position, and (B) shows a state in which the locked member of the forward fall prevention mechanism is in the storage position. indicates a certain condition. FIG. 3 is a schematic plan view showing the relationship between the base member and the seat main body, in which (A) shows the seat main body in a forward-facing state, and (B) shows that the seat main body is in a backward-facing state. 5A is a plan view showing a rail portion of the base member, FIG. 5B is a schematic cross-sectional view taken along line BB in FIG. 5A, and FIG . 5(A) is a schematic cross-sectional view taken along line CC.

Embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same reference numerals are attached to the same or corresponding parts in the drawings, and the description thereof will not be repeated.

<Child seat overview>
A child seat 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the description of the child seat 1, the front direction is the direction indicated by the arrow A1 in FIGS. 1, 4, and 5, and the rear direction is the opposite direction. The longitudinal direction corresponds to the longitudinal direction of the child seat 1. The left-right direction is the direction shown by arrow A2 in FIGS. 4 and 5, and corresponds to the left-right direction when viewed from the front of the child seat 1.

The child seat 1 according to the present embodiment is a device that is placed on the seat of a car and allows children such as infants and young children to ride safely. The child seat 1 generally includes a base member 2 and a seat body 3.

(About base members)
The base member 2 is attached to the seat of an automobile and supports the seat body 3 from below. The base member 2 includes a pedestal part 20 and an upright part 21 rising upward from an end of the pedestal part 20. The base member 2 has an upright portion 21 located on the rear side of the automobile. That is, the upright portion 21 is located on the backrest side of the automobile. As shown in FIG. 1B, the height H1 from the bottom surface of the pedestal section 20 (the surface where the base member 2 contacts the seat of the automobile) to the upper end of the upright section 21 is preferably 310 mm or more, for example. As shown in FIG. 3, the upright portion 21 is provided with a locked member 61 and a motion transmitting member 70, which will be explained later.

As shown in FIGS. 1 to 3, a substantially central portion of the upper surface of the pedestal portion 20 of the base member 2 constitutes a concave portion, which corresponds to the bottom portion of the seat body 3 constituting a convex portion. The recessed portion of the base member 2 is formed of an annular side wall surface 23, and a rail portion 24 that projects toward the center of the recessed portion of the base member 2 is provided at a lower portion thereof. The rail portion 24 is a portion that rotatably contacts the seat body 3, which will be described later. FIG. 5(A) is a schematic plan view of the rail portion 24. As shown in FIG. 5(A), the rail portion 24 has a donut shape in plan view, and lock holes 25 and temporary lock holes 26 are provided alternately. Specifically, lock holes 25 are provided at the front and rear, and temporary lock holes 26 are provided at the right and left sides. The lock hole 25 and the temporary lock hole 26 are typically recesses with an upward opening, but may be through holes.

As shown in FIG. 5(B), the lock hole 25 is a hole having a substantially square shape in cross section, and the angle formed by the bottom portion 25a and a pair of side portions 25b connecting the bottom portion 25a and the rail portion 24 is, for example, It is about 90 degrees. As shown in FIG. 5(C), the temporary lock hole 26 is a hole having a substantially trapezoidal shape in cross section, and the angle formed by the bottom portion 26a and a pair of side portions 26b connecting the bottom portion 26a and the rail portion 24 is It is an obtuse angle, for example, 100 degrees or more. A lock pin 44, which will be described later, engages with the lock hole 25 and the temporary lock hole 26 from above.

(About the seat itself)
Referring to FIG. 1, the seat main body 3 is mounted on the pedestal portion 20 of the base member 2. As shown in FIG. A child sits on the seat body 3. For this reason, the seat body 3 has a seat part 30 that supports the child's buttocks, and a backrest part 31 that rises from the rear of the seat part 30 and supports the child's back (indicated by a broken line in FIG. 1(B)). ing). Furthermore, the bottom of the seat body 3 includes a constriction 34 and a lower portion 35 that is provided below the constriction 34 and has a larger circumference than the constriction 34 in order to engage with the base member 2 . The rail portion 24 of the base member 2 described above is located in the constricted portion 34 . With such a configuration, the seat body 3 is rotatably provided and can be prevented from coming off the base member 2.

The seat body 3 is rotatably attached to the base member 2 and can be switched between a forward-facing state and a backward-facing state. The forward facing state is a state where the back of the backrest portion 31 faces the upright portion 21, and means that the child is sitting facing the front of the automobile. The forward facing state is the state shown in FIG. The backward facing state is a state in which the front of the backrest portion 31 faces the upright portion 21, and means that the child is sitting facing the rear of the automobile. Illustration of the backward facing state is omitted. The seat body 3 is locked in the forward facing state and the backward facing state. Locking means that the rotation does not occur unless a certain operation (for example, operation using the operation unit 5) is performed. This locking is performed using a lock hole 25 provided in the base member 2 and a lock pin 44 provided in the seat body 3.

The seat body 3 may be temporarily locked in a horizontal position. The sideways state is a state between the forward-facing state and the backward-facing state. Specifically, it is a state rotated approximately 90 degrees from the forward-facing state and the backward-facing state, and the child is placed on the side of the car (for example, at the door). It means to sit facing the Temporary locking does not require a certain amount of operation, and is intended to be rotated by applying a certain amount of force. Temporary locking is performed using a temporary lock hole 26 provided in the base member 2 and a lock pin 44 provided in the seat body 3. Details will be described later.

FIG. 4 is a schematic plan view showing the relationship between the base member 2 and the seat main body 3. FIG. 4(A) shows that the seat main body 3 is in a forward facing state, and FIG. 4(B) shows that the seat main body 3 is in a backward facing state. Referring to FIG. 4(A), the outer circumferential surface 32 of the rotating portion of the seat body 3 forms a cam surface 33 having a different distance from the rotation axis C in a part thereof. Specifically, the dimension L1 from the rotational axis C to the cam surface 33 is larger than the dimension L2 from the rotational axis C to the outer peripheral surface 32. The cam surface 33 is a bulging portion that bulges out from the outer peripheral surface 32 toward the base member 2 . The cam surface 33 is formed at the rear of the seat body 3, that is, below the backrest portion 31. As a result, as shown in FIGS. 3(A) and 4(A), in the forward facing state, the cam surface 33 is positioned rearward and presses the contact portion 73 of the motion transmission member 70 provided on the base member 2. . As shown in FIGS. 3(B) and 4(B), in the backward state, the cam surface 33 is located forward, and therefore does not press the interlocking mechanism 7 provided on the base member 2. Details will be described later.

(About the rotational position fixing mechanism)
As described above, the child seat 1 is provided with the seat body 3 rotatable with respect to the base member 2. However, when using the seat body 3 with a child on it, it is necessary to fix the seat body 3 to the base member 2. The child seat 1 of this embodiment is provided with a rotational position fixing mechanism 4 that fixes the rotational position of the seat body 3 with respect to the base member 2.

As shown in FIG. 1, the rotation position fixing mechanism 4 is provided in a lock hole 25 provided in the base member 2 and in the seat body 3 so as to be movable up and down, and engages with the lock hole 25 when in the lower position. It includes a lock pin 44 and a lock operation interlocking member 40 that operably connects the lock pin 44 and the locking member 60. As described above, the lock holes 25 are provided in two locations, one in the front and one in the rear, as shown in FIG. 5(A), and the seat body 3 is locked in the forward facing state and the backward facing state.

As shown in FIG. 1, the locking operation interlocking member 40 is a member that can be displaced to a forward position and a rearward position. Specifically, the locking operation interlocking member 40 has a generally L-shape when viewed from the side as a whole, and is formed from a vertical member 41 and a horizontal member 42 . The horizontal member 42 is provided with an elongated hole 43 that slopes downward toward the front at a corner that connects to the vertical member 41. A lock pin 44 that engages with a lock hole 25 provided in the base member 2 passes through the elongated hole 43 . As shown in FIG. 1(B), the lock pin 44 is pulled out from the lock hole 25 by the locking movement interlocking member 40 moving to the front position, and as shown in FIG. 1(A), the locking movement interlocking member 40 moves to the front position. When the lock pin 44 moves to the rear position, the lock pin 44 penetrates into the lock hole 25.

A locking member 60 is attached to the upper end of the vertical member 41 of the locking operation interlocking member 40. As a result, the locking operation interlocking member 40 brings the locking member 60 to the upper position when the lock pin 44 is in the lower position (FIG. 1(A)), and brings the locking member 60 to the upper position when the lock pin 44 is in the upper position. 60 to the lower position (FIG. 1(A)). In other words, the locking operation interlocking member 40 locks the rotation of the base member 2 and the seat body 3 (locks the rotational position fixing mechanism 4), and locks the seat body 3 in the forward-facing state so that it does not fall forward. (locking the forward fall prevention mechanism 6), and the release of these locks can also be linked. The forward fall prevention mechanism 6 will be described later.

The locking operation interlocking member 40 is biased toward the rear position by a biasing member such as a spring, and specifically, the lock pin 44 is in the downward position and the locking member 60 is in the upward position. biased in the direction. Therefore, in order to place the lock pin 44 in the upper position and the locking member 60 in the lower position, it is necessary to operate the operating unit 5.

The operating section 5 includes a pair of levers 51 that are provided on both sides of the seat body 3 and can be pressed upward. The lever 51 is connected to an end of the cross member 42 of the locking operation interlocking member 40 via a connecting member 45 such as a link or a wire. As a result, by pressing the lever 51 upward to change the state from the state shown in FIG. 1(A) to the state shown in FIG. The lock pin 44 moves upward along the lock pin 44 and is pulled out from the lock hole 25. In this way, by operating the operating section 5, the lock can be released and the seat body 3 can be rotated with respect to the base member 2.

Although the operation parts 5 are provided on both sides of the seat body 3, it is preferable that the operation parts 5 be provided so that the locking operation interlocking member 40 is operated by operating either one of them. By doing so, when the child seat 1 is placed in the forward-facing state, there is no need to take the trouble of reaching out to the operating section 5 located on the back side, and it is only necessary to operate the operating section 5 located on the near side. Furthermore, instead of providing a pair of operating units 5, one location may be provided in front of or in the direction of the seat body 3.

(About the forward fall prevention mechanism)
The child seat 1 of this embodiment is provided with a forward fall prevention mechanism 6 to prevent the seat body 3 in the forward facing state from falling forward. As shown in FIG. 1, the forward fall prevention mechanism 6 includes a locking member 60 and a locked member 61. As described above, the locking member 60 is provided along the backrest portion 31 of the seat body 3. Specifically, the locking member 60 extends vertically along the backrest portion 31. The locking member 60 is attached to the upper end of the locking operation interlocking member 40. The locking member 60 is typically a lock pin extending in the vertical direction, but may also be a hook with a bent end, or a member extending in the left-right direction.

The vertical movement of the locking member 60 is interlocked with the longitudinal movement of the locking movement interlocking member 40. That is, when the locking operation interlocking member 40 moves to the rear position, the locking member 60 also moves to the upper position, and when the locking operation interlocking member 40 moves to the front position, the locking member 60 also moves to the lower position. In this embodiment, the first position of the locking member 60 is the upper position shown in FIG. 1(A), and the second position is the lower position shown in FIG. 1(B). It is. In the following description, the first position will be referred to as an upper position, and the second position will be referred to as a lower position. In FIG. 1, the locking member 60 is exposed from the back surface of the seat body 3, but it may be provided so that it protrudes from the seat body 3 at the upper position and is completely housed within the seat body 3 at the lower position. .

The locked member 61 is a member that engages with the locking member 60 located at the upper position. The locked member 61 is typically a through hole, but may be a recessed portion that does not penetrate through the hole. Furthermore, although the locked member 61 typically extends in the vertical direction, it may extend in the horizontal direction, for example, and the direction in which it opens is not limited.

As shown in FIG. 1(B), the locked member 61 is provided on the upright portion 21 of the base member 2. As shown in FIG. It is preferable that the height H1 from the bottom surface of the pedestal portion 20 to the locked member 61 is 300 mm or more. Further, it is preferable that the height H3 from the upper end surface of the seat portion 30 of the seat body 3 (the surface in contact with the child's buttocks) to the locked member 61 is 100 mm or more.

As shown in FIGS. 2 and 3, the locked member 61 is provided at the upright portion 21 of the base member 2, and is located at a protruding position (FIG. 2(A), FIG. (A)) and a storage position where it does not protrude from the base member 2 (FIGS. 2(B) and 3(B)). In FIGS. 2(B) and 3(B), the distal end portion of the locked member 61 appears to be slightly protruding from the upright portion 21, but it is desirable that it be completely housed within the upright portion 21. As shown in FIG. 1A, when the locked member 61 is in the protruding position, it engages with the locking member 60 in the first position (upper position).

In this manner, by providing the locked member 61 at a relatively high position of the upright portion 21, it is possible to effectively prevent the seat body 3 in the forward facing state from falling forward. Further, the locked member 61 is an engaging hole extending in the vertical direction, the locking member 60 is an engaging pin that is movable in the vertical direction, and when the engaging pin is fitted into the engaging hole, the locking member Since the four sides of the vehicle 60 are surrounded by the locked members 61, it is possible to cope with not only frontal and rear collisions of the automobile but also side collisions.

(About the interlocking mechanism)
The locked member 61 can take either a protruding position or a retracted position, but its position is changed depending on the rotational position of the seat body 3. The child seat 1 of this embodiment is provided with an interlocking mechanism 7 as a mechanism for switching the position of the locked member 61 according to the rotational position of the seat body 3.

The interlocking mechanism 7 brings the locked member 61 to the protruding position when the seat main body 3 is in the forward facing state, and brings the locked member 61 to the storage position when the seat main body 3 is in a state other than the forward facing state. A state other than the forward facing state refers not only to a backward facing state and a sideways facing state, but also to a state other than a state where the back surface of the backrest portion 31 and the upright portion 21 do not face each other and are arranged in parallel. It is preferable that the interlocking mechanism 7 brings the locked member 61 to the storage position at least when the seat body 3 is in the rearward and sideways positions.

As shown in FIGS. 3 and 4, the interlocking mechanism 7 includes a motion transmitting member 70 and an outer circumferential surface 32 of the seat body 3. The motion transmission member 70 includes a link member 71 provided on the base member 2 and extending in the vertical direction. The link member 71 is supported so as to be able to see-saw through a shaft 72 provided at its central portion. The upper end of the link member 71 is in contact with the locked member 61. The lower end of the link member 71 is provided with a contact portion 73 that contacts the outer circumferential surface 32 of the rotating portion of the seat body 3 . That is, in the motion transmission member 70, when the abutting part 73 is housed in the base member 2, the locked member 61 protrudes, and when the abutting part 73 protrudes from the base member 2, the locked member 61 is moved from the base member 2. It is housed within member 2.

The contact portion 73 of the motion transmission member 70 is biased by a biasing member (not shown) so as to contact the seat body 3 . The biasing member is, for example, an elastic member such as a spring. The contact portion 73 is urged to protrude from the base member 2, as shown in FIG. 3(B). Since the seat body 3 is rotatably provided on the base member 2, the position of the contact portion 73 depends on the shape of the outer peripheral surface 32 of the seat body 3. As shown in FIGS. 3(A) and 4(A), when the seat body 3 is rotated, the contact portion 73 moves inside the base member 2 only when the seat body 3 is in the forward facing state. and the locked member 61 is displaced to the protruding position. By providing the interlocking mechanism 7 in this way, the locked member 61 in the protruding position can be moved to the storage position simply by rotating the seat body 3.

<Child seat operation>
Next, the operation of the child seat 1 of this embodiment will be explained.

When placing a child on the seat body 3 of the child seat 1, the child seat 1 is placed in a horizontal position. In the horizontal state, the lock pin 44 of the seat body 3 engages with the temporary lock hole 26 (FIGS. 5(A) and 5(C)) of the base member 2, and rotation of the seat body 3 is temporarily locked. After the child is placed on the seat body 3 and the belt is fastened, the seat body 3 is rotated with a slightly strong force in order to turn the seat body 3 into a forward facing state. In this case, since the side portion 26b of the temporary lock hole 26 is inclined, simply pushing the seat body 3 with a slightly stronger force than normal will cause the lock pin 44 to come out from the temporary lock hole 26 and release the temporary lock. Ru.

When the seat body 3 approaches the forward facing state, the cam surface 33 formed on the outer peripheral surface 32 of the seat body 3 comes into contact with the contact portion 73 of the motion transmission member 70, as shown in FIG. 4(A). As shown in FIGS. 2(A) and 3(A), when the motion transmitting member 70 performs a seesaw motion and the abutting portion 73 is housed in the upright portion 21, the locked member 61 moves into the upright portion. 21 and is displaced to the protruding position. Here, since the lock pin 44 is always urged downward, it rotates while contacting the rail portion 24. Therefore, when the seat body 3 approaches the forward-facing state, the lock pin 44 automatically engages with the lock hole 25, as shown in FIG. 1(A). At the same time, the locking operation interlocking member 40 moves to the forward position, and the locking member 60 engages with the locked member 61 in the protruding position.

When removing a child from the child seat 1, the child seat 1 must be turned sideways. Push the lever 51 of the operating section 5 upward to shift the state from the state shown in FIG. 1(A) to the state shown in FIG. 1(B). That is, when the lever of the operation part 5 is pushed upward, the locking operation interlocking member 40 connected to the lever 51 moves to the forward position, the locking pin 44 is pulled out from the locking hole 25, and the locking member 60 is moved downward. By moving, the engagement between the locking member 60 and the locked member 61 is released.

When the seat body 3 is rotated, it is displaced from the state shown in FIGS. 3(A) and 4(A) to the state shown in FIGS. 3(B) and 4(B). That is, since the contact portion 73 of the motion transmission member 70 is biased toward the seat body 3, the contact portion 73 that was in contact with the cam surface 33 is moved toward the outer circumferential surface as the seat body 3 rotates. 32, and the locked member 61 is displaced to the storage position. In this manner, when the seat body 3 is in a position other than the forward facing position, the locked member 61 is in the storage position.

Furthermore, the seat body 3 is rotated to a sideways state. As described above, the lock pin 44 is always urged downward, so it automatically engages with the temporary lock hole 26. As a result, the seat body 3 is temporarily locked in the horizontal position. In this state, the child can be removed from the child seat 1 by removing the belt attached to the child.

In the forward fall prevention mechanism 6 of the present embodiment, the locked member 61 is provided at a high position such as the upright portion 21, compared to a structure in which the locked member 61 is provided at a low position such as the pedestal portion 20. Thus, the seat body 3 can be effectively prevented from falling forward. However, since the locked member 61 is provided at a high position, when it is used in a position other than the forward facing position, it becomes a nuisance for the operator and is also dangerous for children. In this embodiment, the locked member 61 protrudes only in the forward facing state and is housed within the upright portion 21 in other than the forward facing state, so there is no such disadvantage.

Further, in the child seat 1 of the present embodiment, the locked member 61 provided on the upright portion 21 is displaced between the storage position and the protruding position in conjunction with the rotation of the seat body 3, and is locked when in the forward facing state. The member 60 and the locked member 61 engage with each other. Therefore, it is possible to prevent the seat body 3 from falling forward simply by rotating the seat body 3, resulting in excellent workability. Further, in conjunction with the rotation of the seat body 3, the lock pin 44 automatically fits into the lock hole 25 when the seat body 3 is placed in a forward facing state or a backward facing state. In this way, when the seat body 3 is placed in the forward facing state, it is possible to prevent the seat body 3 from falling forward in conjunction with the rotation of the seat body 3, and to lock the rotation of the seat body 3 and the base member 2. Therefore, in order to perform these operations, the operator only needs to rotate the seat body 3, which reduces the possibility of malfunctions and provides excellent operability.

When the seat body 3 is rotated relative to the base member 2, the lock pin 44 engages with the lock hole 25 when the seat body 3 is in the forward-facing and backward-facing states, and the engagement is released by operating the operating section 5. be done. When the seat main body 3 is rotated after operating the operating part 5 and the seat main body 3 is turned sideways, the lock pin 44 engages with the temporary lock hole 26. Since it is temporarily locked in the sideways state, there is no need to operate the operating part 5, and when the seat body 3 is rotated with a force slightly stronger than the normal rotation force, the engagement between the lock pin 44 and the temporary lock hole 26 is released. . In this way, when the seat body is in the forward-facing and rearward-facing states, it is necessary to operate using the operating section 5, but when the seat body is facing sideways, there is no need to operate using the operating section 5, and in this respect, the seat body is also excellent in operability.

In the embodiment described above, the rotational position fixing mechanism 4 and the forward tilt prevention mechanism 6 function as the seat body 3 rotates, but at least the forward tilt prevention mechanism functions as the seat body 3 rotates. 6 should work. That is, in accordance with the rotation of the seat body 3, the locked member 61 of the forward fall prevention mechanism 6 may be displaced between the storage position and the protruding position.

Further, in the above embodiment, the motion transmission member 70 includes the link member 71 that connects with the locked member 61, but it is in contact with the locked member 61 and indirectly controls the movement of the seat body 3. It may also be something that transmits the information to the locked member 61.

Further, in the above embodiment, the locking operation interlocking member 40 is composed of a vertical member 41, a horizontal member 42, and an elongated hole 43 formed therein, and a lock pin 44 is slidably provided in the elongated hole 43. However, if the locking member 60 is brought to the upper position when the lock pin 44 is at the lower position, it may move, for example, in the left-right direction or the up-down direction. You can.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same scope as the present invention or within an equivalent scope.

1 Child seat, 2 Base member, 3 Seat body, 4 Rotation position fixing mechanism, 5 Operation unit, 6 Forward fall prevention mechanism, 7 Interlocking mechanism, 20 Pedestal part, 21 Upright part, 25 Lock hole, 32 Outer circumferential surface, 40 Lock operation Interlocking member, 44 lock pin, 45 connecting member, 60 locking member, 61 locked member, 70 motion transmission member.

Claims (9)

A base member that includes a pedestal part and an upright part rising upward from an end of the pedestal part, and is mounted on a seat of an automobile with the upright part located on the rear side;
a seat main body that is rotatably mounted on the pedestal and can be switched between a forward-facing state in which the back surface of the backrest portion faces the upright portion, and a rearward-facing state in which the front surface of the backrest portion faces the upright portion;
a rotational position fixing mechanism that fixes the rotational position of the seat body with respect to the base member;
A lock that prevents the seat body in the forward facing state from collapsing forward, and is movable between a first position and a second position along a backrest portion of the seat body. a member, a protruding position provided on the upright part, protruding from the upright part toward the seat body and engaging with the locking member in the first position, and a storage position that does not protrude from the upright part. a forward fall prevention mechanism including a removable locked member;
The position of the locked member is switched according to the rotational position of the seat body, and the locked member is brought to the protruding position when the seat body is in the forward-facing position, and when the seat body is not in the forward-facing position. and an interlocking mechanism that brings the locked member to a storage position when the child seat is in the storage position. The locked member has an engagement hole extending in the vertical direction,
The locking member includes an engagement pin that is vertically displaceable between the first position and the second position,
The child seat according to claim 1, wherein the engagement pin fits into the engagement hole when in the upper first position. The child seat according to claim 1 or 2, wherein the interlocking mechanism includes a motion transmission member having one end in contact with an outer circumferential surface of the rotating portion of the seat body and the other end in contact with the locked member. 4. The child seat according to claim 3, wherein the outer peripheral surface of the rotating portion of the seat body forms cam surfaces having different distances from the rotation axis. The child seat according to claim 4, wherein the interlocking mechanism includes a biasing member that biases one end of the motion transmission member to contact the cam surface. The child seat according to any one of claims 3 to 5, wherein the motion transmission member has a central portion supported by the base member via a shaft so as to be able to see-saw. The rotational position fixing mechanism includes a lock hole provided in the base member, a lock pin that is provided in the seat body so as to be movable up and down and that engages with the lock hole when in the lower position, and the lock pin and the lock pin. The child seat according to any one of claims 1 to 6, further comprising a locking operation interlocking member that operably connects the child seat with the stopper member. The locking operation interlocking member is movable to a forward position and a rearward position,
The child seat according to claim 7, wherein when the locking interlocking member is in the forward position, the locking pin is brought to an upper position and the locking member is brought to a lower position. The child seat according to claim 7 or 8, further comprising an operation section for moving the locking operation interlocking member to a forward position.

Images