JP2008174016A - Locking mechanism for stroller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking mechanism for a stroller capable of suppressing influence of external factors and securing smooth movements. <P>SOLUTION: A locking member 41 is slidably housed in a lower end part of a back frame 13 of a vehicle body. A link connection member 24 is fixed to a rear end of a seat frame 6. When the vehicle body 2 is in a using state, a receiving part 28b provided for a guide shaft part 28 of the link connection member 24 is engaged with a claw part 41b of the locking member 41 for preventing relative rotation around a fulcrum pin 31 of the seat frame 6 and the back frame 13 and restraining the vehicle body 2 in a using state. A locking cover is fixed to the lower end part of the back frame 13. The locking cover is provided with a housing part. The housing part is fitted to the guide shaft part 28 from the outside to cover the receiving part 28b from the outside of the vehicle body 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stroller lock mechanism having a foldable vehicle body.

There is provided a stroller in which a vehicle body can be deformed between a use state and a folded state by operating a link mechanism of the vehicle body. In this type of stroller, it is generally performed to provide a lock mechanism for restraining the vehicle body to a use state. As the lock mechanism, for example, a lock member is arranged on the outer periphery of the lower end portion of the hand frame of the vehicle body, and the lock member is engaged with a notch-shaped receiving portion of a lock receiving member provided on a bracket on the rear leg. A mechanism for preventing relative rotation between the bracket and the hand frame is known (for example, see Patent Document 1).
Japanese Utility Model Publication No. 6-37050

  In the conventional lock mechanism described above, the lock member and the receiving portion of the lock member and the lock receiving member (the meshing portion with the lock member) are exposed to the outside of the vehicle body. For this reason, there is a possibility that the operation of the lock mechanism may be impaired due to an external factor such that a sewn product of the sheet, foreign matter, or the like is caught between the lock member and the lock receiving member.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stroller lock mechanism that can suppress the influence of external factors and ensure a smooth operation.

  The present invention is applied to a stroller (1) in which the vehicle body can be deformed between a use state and a folded state by operating a link mechanism of the vehicle body (2), and the stroller restrains the vehicle body in the use state. Of the pair of link parts (6, 13) that are rotatably provided around a predetermined fulcrum (31) and constitute a part of the link mechanism. 13) and a lock position that can rotate integrally around the fulcrum and protrudes toward the other link part (6), and a release that retreats away from the other link part from the lock position. A locking member (41) supported by the one link component in a state of being movable between positions, and being rotatable around the fulcrum integrally with the other link component; At this time, the lock member is engaged with the lock member so as not to be relatively displaceable around the fulcrum by the movement of the lock member to the lock position, and the lock member is moved to the release position by the movement of the lock member to the release position. A lock receiving member (24) having a receiving portion (28b) to be disengaged from the lock member, and a cover means (13) for covering each of the lock member and the receiving portion of the lock receiving member from the outside of the vehicle body. 30) and switching means (50) for switching the position of the lock member between the lock position and the release position, thereby solving the above-described problem.

  In the lock mechanism of the present invention, when the vehicle body is changed from the folded state to the used state, the lock member supported by one link part is moved by the relative rotational movement around the fulcrum of the pair of link parts. Is extended to a position facing the receiving portion of the lock receiving member provided on the link component side. In this state, by switching the position of the lock member from the release position to the lock position by the switching means, the lock member meshes with the receiving portion of the lock receiving member, thereby centering the fulcrum between the lock member and the lock receiving member. Rotational movement is prevented. Since the lock member can rotate integrally with one link component and the lock receiving member can rotate integrally with the other link component, the lock member and the lock receiving member are restrained to be relatively unrotatable around the fulcrum. As a result, the pair of link parts also cannot be rotated relative to each other around the fulcrum. As a result, the link mechanism of the vehicle body becomes inoperable and the vehicle body is restrained to the use state. When the vehicle body is folded, the position of the lock member may be switched to the release position. In the lock mechanism of the present invention, since each of the lock member and the receiving portion of the lock receiving member is covered from the outside of the vehicle body by the cover means, an external factor such as a foreign object biting around the lock member or in the receiving portion. The possibility that the operation of the lock mechanism is impaired due to the influence of the above can be eliminated or reduced. Thereby, the smooth operation of the locking mechanism can be ensured.

  In one form of the lock mechanism of the present invention, a hollow portion (13) is provided at an end portion on the fulcrum side of the one link component, and the lock member is slidably accommodated in the hollow portion. The hollow portion may function as cover means for covering the lock member, and when in the locked position, a part of the lock member may protrude from the hollow portion and mesh with the receiving portion of the lock receiving member. According to this, the lock member can be accommodated in the hollow part of one of the link parts, and the sliding portion of the lock member can be protected from external factors such as biting of foreign matter.

  Furthermore, in said form, the said hollow part may be comprised using a pipe material, and a sliding guide (41e, 46) may be provided between the said lock member and the inner periphery of the said hollow part. In this case, the sliding guide (46) may be formed in a substantially cylindrical shape that accommodates the lock member. By providing the sliding guide in this way, the lock member can be smoothly slid regardless of the state of the inner peripheral surface of the pipe member used for one of the link parts.

  In the form in which the lock member is accommodated in the hollow part of one link part, a link connecting member (28) having a guide shaft part (28) arranged coaxially with the fulcrum at the end part on the fulcrum side of the other link part. 24) is provided as the lock receiving member, and the receiving portion (28b) is provided on the outer periphery of the guide shaft portion and at a position facing the lock member when in use, and the one of the link parts is A lock cover (26) that is rotatably connected to the link connecting member and the fulcrum is attached to the outer periphery of the hollow portion, and the lock cover is fitted to the guide shaft portion from the outside. Accordingly, a housing part (30) functioning as cover means for covering the receiving part may be provided.

  According to said form, one link component and the other link component are rotatably connected around a fulcrum via a lock cover and a link connection member. When the vehicle body is deformed, the hollow part of one of the link parts rotates relatively around the guide shaft part in a state in which the lock member is housed therein, and the lock member housed in the hollow part in the use state is a guide. It is drawn out to a position facing the receiving part on the shaft part. Since the lock cover is attached to the outer periphery of the hollow part of one of the link parts, it rotates around the fulcrum integrally with the lock member. The housing portion of the lock cover rotates around the guide shaft portion while covering the receiving portion from the outside. Thereby, the cover means which covers the receiving part of the lock member and the lock receiving member from the outside of the vehicle body is realized. Since the cover means that covers the lock receiving member and its receiving part is configured using the link connecting member and lock cover for connecting a pair of link parts, the main part of the lock mechanism is compactly gathered around the fulcrum can do.

  In one form of the lock mechanism of the present invention, the lock receiving member may be disposed at a position facing the lock member in the folded state, in addition to a position facing the lock member in the use state. A receiving part (28c) may be provided. According to this aspect, not only when the vehicle body is set to the use state, but also when the vehicle body is folded, the lock member can be engaged with the receiving portion to restrain the vehicle body in the folded state.

  In the present invention, the pair of link parts may be appropriately selected from a plurality of link parts included in the link mechanism of the vehicle body so as to be rotatable around a predetermined fulcrum. In a preferred embodiment, the one link component is a back frame (13) that supports a seat back portion, and the other link component is a seat frame (6) that supports a cushion portion of the seat. .

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

  As described above, in the stroller locking mechanism according to the present invention, since the lock member and the receiving portion of the lock receiving member are covered from the outside of the vehicle body by the cover means, foreign matter is caught around the lock member or in the receiving portion. The possibility that the operation of the locking mechanism is impaired due to the influence of external factors such as the above can be eliminated or reduced. Thereby, the smooth operation of the locking mechanism can be ensured.

  FIG. 1 is a side view of a stroller provided with a lock mechanism according to an embodiment of the present invention. The stroller 1 includes a vehicle body 2. The vehicle body 2 has a link mechanism mainly composed of a front leg 3, a rear leg 4, an armrest 5, a seat frame 6 and a hand push frame 7. The vehicle body 2 can be deformed between the use state (the state shown in FIG. 1) and the folded state by rotating the link parts constituting the link mechanism around the respective connection points. FIG. 1 shows the configuration of one side of the vehicle body 2 in the left-right direction (width direction), and the opposite side has the same configuration. The left and right front legs 3 are connected by appropriate connecting members (not shown). The same applies to the rear legs 4. A front wheel 8 and a rear wheel 9 are attached to the lower ends of the front leg 3 and the rear leg 4, respectively.

  The front leg 3 and the rear leg 4 are rotatably connected via arm rests 5 and fulcrum pins 10 and 11 at their upper ends. The seat frame 6 supports a seat cushion (not shown) of the stroller 1, and is arranged one by one on the left and right sides of the vehicle body 2. The seat frame 6 has a plate shape with a rectangular cross section, but may have other shapes such as a hollow pipe shape. A front end portion of the seat frame 6 is rotatably connected to the front leg 3 via a fulcrum pin 12. The hand push frame 7 includes a pair of back frames 13 disposed on the left and right sides of the vehicle body 2 and a handle portion 14 extending between the upper ends of the back frames 13 (see FIG. 10). The back frame 13 supports the seat back of the stroller (part of the reference numeral SB is shown in FIG. 10). The back frame 13 is rotatably connected to the rear end portion of the armrest 5 via a fulcrum pin 15. The back frame 13 is configured using a hollow pipe material over its entire length. That is, the back frame 13 has a structure having a hollow portion over its entire length.

  A connecting mechanism 20 is provided between the rear end portion of the seat frame 6 and the lower end portion of the back frame 13 for connecting the frames 6 and 13 to the rear leg 4. FIG. 2 shows a state in which the coupling mechanism 20 is enlarged from the inside of the vehicle body 2, and FIG. 3 shows a state in which the coupling mechanism 20 is viewed from the direction of arrow III in FIG. 4 is a perspective view of the coupling mechanism 20 as viewed from the front outer side of the vehicle body 2, and FIG. 5 is a perspective view of the coupling mechanism 20 as viewed from the rear inner side of the vehicle body 2. As is clear from these drawings, the connecting mechanism 20 includes a bracket 22 rotatably connected to the rear leg 4 via a fulcrum pin 21, and a link connection fixed to the rear end of the seat frame 6 with a connecting pin 23. A member 24 and a lock cover 26 fixed to the lower end of the back frame 13 with a connecting pin 25 are provided. As shown in an enlarged manner in FIG. 7, the link connecting member 24 includes a base portion 27 fitted to the seat frame 6, and a guide shaft portion 28 connected to one end of the base portion 27. The guide shaft portion 28 has a substantially disk shape, and a stopper portion 28a protruding outward in the radial direction is provided on a part of the outer periphery thereof.

  On the other hand, the lock cover 26 includes a base portion 29 fitted to the back frame 13 and a housing portion 30 connected to one end of the base portion 29. The housing part 30 is fitted to the guide shaft part 28 of the link connecting member 24 from the outside in the left-right direction of the vehicle body 2. A part of the housing part 30 is provided with a stopper part 30a that meshes with the stopper part 28a. As is apparent from FIGS. 4 and 5, the guide shaft portion 28 and the housing portion 30 are fitted coaxially, the housing portion 30 is abutted against the bracket 22 from the inner side in the left-right direction of the vehicle body 2, and the housing is removed from the bracket 22. By piercing the fulcrum pin 31 through the portion 30 to the guide shaft portion 28, the bracket 22, the link connecting member 24, and the lock cover 26 are rotatably connected to each other about the fulcrum pin 31. In the connected state, the back frame 13 is disposed at substantially the same position as the front legs 3 and the rear legs 4 in the left-right direction of the vehicle body 2, and the seat frame 6 is disposed at the inner side in the left-right direction of the vehicle body 2 relative to the front legs 3 and the rear legs 4. The As shown in FIG. 7, the rotation range of the link connecting member 24 and the lock cover 26 is limited by the stopper portions 28a and 30a. In FIG. 7, the stopper portions 28a and 30a are in contact with each other to prevent the rotation of the connecting member 24 and the lock cover 26 in the direction of arrow A in the drawing. At this time, the seat frame 6 and the back frame 13 are in a used state. That is, the stopper portions 28a and 30a restrict the rotation ranges of the seat frame 6 and the back frame 13 so that the seat frame 6 and the back frame 13 do not open further than the positions in the usage state of the vehicle body 2. When the stroller 1 is folded, the seat frame 6 and the back frame 13 rotate in the direction of arrow B about the fulcrum pin 31, respectively.

  In the above stroller 1, the front leg 3, the rear leg 4, the armrest 5, the seat frame 6, the hand push frame 7, and the bracket 22 are connected to the respective connection points, that is, around the fulcrum pins 10, 11, 12, 15, 21, 31. By rotating, the vehicle body 2 changes between the use state and the folded state. As described above, FIG. 1 shows a use state. When the front leg 3 is fixed, the rear leg 4, the armrest 5 and the seat frame 6 rotate in the directions indicated by arrows a, b and c in FIG. 1 as the state changes from the use state to the folded state. The rear leg 4 moves to a position substantially parallel to the front leg 3. As the rear leg 4, the armrest 5 and the seat frame 6 rotate, the bracket 22 rotates around the fulcrum pin 21 in the direction of the arrow d with respect to the rear leg 4, and the back frame 13 also moves behind the rear leg 4 in the front leg 3. Move to a position approximately parallel to

  FIG. 8 shows a configuration of a connecting portion between the seat frame 6 and the back frame 13 with the lock cover 26 omitted. As is clear from FIG. 8, a lock mechanism 40 is provided around the fulcrum pin 31. The lock mechanism 40 is provided to restrain the vehicle body 2 from being used or folded by preventing rotational movement about the fulcrum pin 31 between the seat frame 6 and the back frame 13. The lock mechanism 40 includes the link connecting member 24 and the lock cover 26 described above as constituent elements, and includes a lock member 41 disposed at the lower end of the back frame 13. The lock member 41 is slidably inserted into the back frame 13. A long hole 41 a extending in the longitudinal direction of the back frame 13 is formed in the lock member 41, and a connecting pin 25 for fixing the lock cover 26 to the back frame 13 is passed through the long hole 41 a. As a result, the lock member 41 can slide within a certain range in the longitudinal direction of the back frame 13 while being guided by the connecting pin 25. FIG. 8 shows a state where the lock member 41 is moved to the lock position at the lower end of the movement range, and FIG. 12 shows a state where the lock member 41 is moved to the release position at the upper end of the movement range.

  As shown in FIG. 8, a claw portion 41 b is provided at the tip (lower end) of the lock member 41. The claw portion 41 b faces the outer periphery of the guide shaft portion 28 of the link connecting member 24. A first receiving portion 28 b and a second receiving portion 28 c into which the claw portion 41 b is selectively fitted are opened on the outer periphery of the guide shaft portion 28. These receiving portions 28 b and 28 c are provided around the fulcrum pin 31 at a distance. The receiving portions 28b and 28c may have a groove or a notch shape that opens not only on the outer periphery of the guide shaft portion 28 but also on the shaft end surface side, or may have a bottomed hole or a recess shape that opens only on the outer peripheral surface of the guide shaft portion 28. Good. The first receiving portion 28b is provided at a position facing the claw portion 41b when the vehicle body 2 is in use, and the second receiving portion 28c is provided at a position facing the claw portion 41b when the vehicle body 2 is in a folded state. It has been. Thereby, the link connecting member 24 functions as a lock receiving member of the lock mechanism 40.

  As shown in FIG. 9, the lock member 41 has a substantially rectangular cross section, and protrusions 41 c are respectively provided on two opposing side surfaces. A sliding guide 41d for reducing frictional resistance between the connecting pin 25 and the back frame 13 when the lock member 41 slides on the inner peripheral surface of the long hole 41a and the tip surface of the protrusion 41c, 41e is provided. When these sliding guides 41 d and 41 e are in contact with the connecting pin 25 or the inner peripheral surface of the back frame 13, the lock member 41 smoothly slides in the longitudinal direction of the back frame 13.

  As shown in FIGS. 6 and 7, the lock member 41 is covered from the outside of the vehicle body 2 by the back frame 13, and the portions (receiving portions 28 b and 28 c) that engage with the lock member 41 on the outer periphery of the guide shaft portion 28 and those The region sandwiched between the meshing portions is covered from the outside of the vehicle body 2 by the housing portion 30 of the lock cover 26. By covering the outer periphery of the lock member 41 and the guide shaft portion 28 in this way, foreign matters are sandwiched between the sliding portion of the lock member 41 or the fitting portion between the lock member 41 and the receiving portions 28b and 28c. For this reason, the possibility that the operation of the lock mechanism 40 is impaired is eliminated or reduced. Therefore, the smooth operation of the lock mechanism 40 can be ensured. When lubricating oil is applied to the sliding portion of the lock member 41, the lubricating oil is not exposed to the outside, which is advantageous for maintaining the lubricating effect. This is also advantageous in preventing dust and the like from adhering to the lubricating oil and preventing the lubricating oil from splashing around the lock mechanism.

  As shown in FIG. 8, a coil spring 42 is provided between the lock member 41 and the back frame 13 as a spring means that urges the lock member 41 in a direction in which the claw portion 41 b protrudes from the back frame 13. . Further, a wire 43 for pulling the lock member 41 upward against the force of the coil spring 42 is attached to the lock member 41. As shown in FIGS. 10 and 11, the handle portion 14 of the hand push frame 7 is provided with an operation mechanism 50 for operating the lock member 41 via the wire 43. The operation mechanism 50 is provided with a pulley 52 rotatably inside a housing 51 disposed in the center of the handle portion 14 around a shaft 52 a, and an operation slider that projects a drive pin 52 b on the pulley 52 below the housing 51. 53, and the end of the wire 43 is fixed to the outer periphery of the pulley 52. The coil spring 42 and the wire 43 described above are also included in the components of the operation mechanism 50. When the operation slider 53 is pushed upward, the pulley 52 rotates around the shaft 52 a, and with the rotation, the wire 43 is wound around the outer periphery of the pulley 52, and the lock member 41 incorporated in the left and right back frames 13. Is raised. A lock slider 54 is attached to the outer periphery of the housing 51. When the lock slider 54 is operated in the arrow X direction in FIG. 11, the lock arm 54 a of the lock slider 54 rides on the operation slider 53 and the operation slider 53 cannot be pushed.

  Next, the operation of the lock mechanism 40 will be described. As described above, FIG. 8 shows a state where the rotation of the link connecting member 24 and the lock cover 26 is prevented by the lock mechanism 40 when the vehicle body 2 is in use. In this state, since the claw portion 41b of the lock member 41 and the first receiving portion 28b of the guide shaft portion 28 mesh with each other around the fulcrum pin 31 so as not to be relatively displaceable, the seat frame 6 and the back frame 13 are fulcrum pin. It is not possible to rotate around 31. For this reason, the link mechanism of the vehicle body 2 taking in the seat frame 6 and the back frame 13 as part of the link element cannot operate, and the vehicle body 2 cannot be folded. When the operation slider 53 of the operation mechanism 50 is pushed in from the state of FIG. 8, the wire 43 is pulled up and the lock member 41 is moved upward, and the claw portion 41b escapes from the first receiving portion 28b as shown in FIG. To do. Thereby, the vehicle body 2 can be folded.

  When the restraint by the lock mechanism 40 is released and the vehicle body 2 is changed from the use state to the folded state, the seat frame 6 and the back frame 13 rotate in a direction approaching each other around the fulcrum pin 31 as shown in FIG. Accordingly, the claw portion 41b of the lock member 41 relatively moves on the outer periphery of the guide shaft portion 28 from the first receiving portion 28b toward the second receiving portion 28c. When the vehicle body 2 reaches the folded state, the claw portion 41b of the lock member 41 is fitted into the second receiving portion 28c as shown in FIG. As a result, the rotation of the link connecting member 24 and the lock cover 26 is prevented. As a result, the seat frame 6 and the back frame 13 cannot be rotated relative to each other, and the vehicle body 2 is held in the folded state. In order to return from the folded state to the used state, the operation slider 53 of the operation mechanism 50 may be pushed in to retract the claw portion 41b of the lock member 41 from the second receiving portion 28c.

  In the above embodiment, the connection pin 25 for fixing the lock cover 26 to the back frame 13 is fitted with the elongated hole 41 a of the lock member 41, so that the connection pin 25 is used as a guide for the lock member 41. However, as illustrated in FIG. 15, the lock member 41 may be guided between the protrusion 41 c and the inner peripheral surface of the back frame 13 without passing the connecting pin 25 through the lock member 41. As shown in FIGS. 16 and 17, a substantially cylindrical guide rail 46 may be mounted inside the back frame 13, and the lock member 41 may slide on the inner periphery of the guide rail 46.

  In the lock mechanism 40 described above, since the lock member 41 is provided inside the back frame 13, it is not necessary to provide a long hole for guiding the lock member 41 in the back frame 13. Thereby, the rigidity of the back frame 13 can be improved.

  In the above embodiment, the back frame 13 of the hand push frame 7 corresponds to one link component, and the seat frame 6 corresponds to the other link component. The back frame 13 functions as cover means for covering the lock member 41 from the outside of the vehicle body 2, and the housing portion 30 of the lock cover 26 covers the receiving portions 28 b and 28 c of the link connecting member 24 as the lock receiving member from the outside of the vehicle body 2. It functions as a cover means. Further, the operation mechanism 50 corresponds to a switching unit related to the position of the lock member.

  The present invention is not limited to the form described above, and can be implemented in various forms. For example, in the above embodiment, the vehicle body can be restrained in the use state and in the folded state by the lock mechanism. However, the lock mechanism of the present invention can rotate relative to the pair of link parts at least when the vehicle body is in use. As long as the vehicle body can be restrained by restraining the vehicle. As an example, the second receiving portion 28c of the guide shaft portion 28 may be omitted. In this case, in the folded state, the vehicle body 2 may be held in a folded state by a method such as binding the vehicle body using a binding band or the like. The lock mechanism is not limited to the periphery of the fulcrum that connects the seat frame and the back frame of the hand push frame, and can be provided at an appropriate position. That is, a pair of link parts provided so as to be rotatable around a predetermined fulcrum is extracted from a plurality of link parts constituting the link mechanism of the vehicle body, and a lock mechanism may be provided around the fulcrum of these link parts. . The lock member is not limited to linearly reciprocating, and may be one that rotates between a lock position and a release position. For example, a bottomed cylindrical housing is arranged at the lower end of the back frame, a lock member is rotatably accommodated inside, a projection is provided on a part of the lock member, and the projection is locked according to the rotational position. The structure which is made to appear in the receiving part of a receiving member may be sufficient. A hollow portion may be provided in the lock cover instead of the back frame, and the lock member may be slidably mounted therein.

The side view of the stroller provided with the lock mechanism concerning one form of the present invention. The figure which shows the state which expanded the connection mechanism for connecting a seat frame and a back frame to a rear leg from the inner side of a vehicle body. The figure which shows the state which looked at the connection mechanism from the arrow III direction of FIG. The perspective view which looked at the connection mechanism from the front outer side of the vehicle body. The perspective view which looked at the connection mechanism from the back inner side of the vehicle body. The figure which expands and shows the state which looked at the connection part of a seat frame and a back frame from the left-right direction outer side of the vehicle body. The figure which expands and shows the state which looked at the connection part of a seat frame and a back frame from the left-right direction inner side of the vehicle body. The figure which abbreviate | omitted the lock cover and showed the structure of the connection part of a seat frame and a back frame. Sectional drawing along the IX-IX line of FIG. The perspective view which shows the structure of the upper end part of a hand pushing frame. The figure which shows the internal structure of the operation mechanism provided in a handle part. The figure which shows a mode that the lock member was moved to the cancellation | release position from the state of FIG. The figure which shows the mode in the middle of folding the vehicle body from the state of FIG. The figure which shows the mode of the lock mechanism when a vehicle body is folded. The figure which shows the modification of FIG. The figure which shows the further modification of FIG. The figure which shows the internal structure of the lower end part of the back frame corresponding to FIG.

Explanation of symbols

1 Stroller 2 Car body 3 Front leg 4 Rear leg 5 Armrest 6 Seat frame (the other link part)
7 Hand frame 13 Back frame (One link part, cover means)
20 connecting mechanism 22 bracket 24 link connecting member (lock receiving member)
26 Lock cover 28 Guide shaft portion 28b, 28c Receiving portion 30 Housing portion 40 Lock mechanism 41 Lock member 41b Claw portion 41d, 41e Sliding guide 42 Coil spring 43 Wire 46 Guide rail (sliding guide)
50 Operating mechanism (switching means)

Claims (7)

In a stroller lock mechanism that is applied to a stroller that can be deformed between a use state and a folded state by operating a link mechanism of the vehicle body, and restrains the vehicle body in the use state.
Of the pair of link parts that are provided so as to be rotatable around a predetermined fulcrum and constitute a part of the link mechanism, together with any one of the link parts, it can rotate integrally around the fulcrum, and the other A lock member supported by the one link component in a state of being movable between a lock position protruding toward the link component of the first link component and a release position retracted in a direction away from the other link component relative to the lock position. When,
The lock member can be rotated around the fulcrum integrally with the other link component, and at a position facing the lock member in the use state, the lock member and the lock member are moved by the movement of the lock member to the lock position. A lock receiving member having a receiving portion that meshes around a fulcrum so as not to be relatively displaceable, and is disengaged from the lock member by moving the lock member to the release position;
Cover means for covering each of the lock member and the receiving portion of the lock receiving member from the outside of the vehicle body;
Switching means for switching the position of the lock member between the lock position and the release position;
A stroller locking mechanism characterized by comprising:   A hollow portion is provided at an end portion on the fulcrum side of the one link part, and the lock portion is slidably accommodated in the hollow portion so that the hollow portion functions as a cover unit that covers the lock member. The locking mechanism according to claim 1, wherein a part of the locking member protrudes from the hollow portion and engages with the receiving portion of the lock receiving member at the locking position.   The lock mechanism according to claim 2, wherein the hollow portion is configured using a pipe material, and a sliding guide is provided between the lock member and the inner periphery of the hollow portion.   The locking mechanism according to claim 3, wherein the sliding guide is formed in a substantially cylindrical shape that accommodates the locking member.   A link connecting member having a guide shaft portion arranged coaxially with the fulcrum is provided as the lock receiving member at an end portion on the fulcrum side of the other link component, and the outer periphery of the guide shaft portion and the use state The receiving portion is provided at a position facing the lock member at the time, and a lock cover is rotatably connected to the outer periphery of the hollow portion of the one link component around the link connecting member and the fulcrum. 3. The housing according to claim 2, wherein the lock cover is provided with a housing portion that functions as a cover unit that covers the receiving portion by being fitted to the guide shaft portion from the outside. The locking mechanism described.   The lock receiving member is provided with the receiving portion in a position facing the lock member in the folded state in addition to a position facing the lock member in the use state. The locking mechanism according to any one of claims 1 to 5.   The one link component is a back frame that supports a seat back portion, and the other link component is a seat frame that supports a cushion portion of the seat. The locking mechanism according to the item.

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