JPH0620163U - Opening and closing operation mechanism provided on the push rod of the stroller - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to an operating mechanism for opening and closing a lock mechanism provided on a push rod of a stroller. [Structure] A drive wire drive pulley is rotatably mounted in a housing, and the drive pulley is rotated by vertical movement of an operation lever slidably attached to the lower part of the housing. An opening / closing operation mechanism that is provided with a stopper mechanism that can be lifted up and down to be released by a pressing operation. [Effect] Since the operating wire moves along the peripheral edge of the drive pulley, a large operating stroke can be obtained with a small rotation distance. When the operating lever is not operated, the stopper operates and the sliding of the operating lever is regulated. Is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operation mechanism for opening and closing a lock mechanism provided in a stroller, and more particularly to a remote opening / closing operation mechanism provided in a push rod.

[0002]

[Prior art]

 It is well known in the art that the stroller can be compactly folded and stored, and that the stroller push rod can be positioned upright or rearward of the infant seat.

[0003] Furthermore, the locking mechanism for the folding operation and the mechanism for locking the standing position of the push rod can be remotely controlled by using an operating mechanism provided at the center of the push rod. No. 48866, No. 61-139859, No. 63-34766, and the like.

In the above-described known structure, a link-shaped operation lever having a central portion pivotally mounted is swingably mounted in a housing having a hollow inside, and a remote operation wire of a remote operation is attached to a tip of the operation lever. Operates the remote operation wire attached to the tip of the operating lever by attaching the base end and swinging the protruding end (operation part) of the operation lever with the base end protruding outside the housing to the left or right. It was a link structure that allowed it.

[0005]

[Problems to be solved by the device]

 In the above-mentioned known structure, the operation stroke of the operation wire is determined by the distance between the support shaft (pivot shaft) provided in the central part of the operation lever and the operation wire attachment part, the support shaft (pivot shaft) and the base end part of the operation lever. Since it is configured to control in proportion to the distance to, if it is attempted to secure a sufficient operation stroke and to reduce the force required for operation, the operation lever support shaft (pivot shaft) and operation lever base end It was pointed out that the mechanism for opening / closing control would become large as a whole because the distance between the spindle and the operating lever would have to be increased. It is pointed out that the force required for operation becomes heavier in inverse proportion to the distance ratio if it is attempted to secure a sufficient operation stroke of the wire, which makes operation difficult.

In addition, in the above structure, there is a risk that the lock mechanism may be released abruptly if the operation lever protruding from the housing is touched while pushing the stroller. The shape of the lever and the structure that locks the operating lever to the housing must be configured as a special one, resulting in the disadvantages that the assembly process of the product becomes complicated and the manufacturing cost rises. .

[0007]

[The purpose of the device]

 The present invention addresses these problems in view of the above circumstances, and an opening / closing operation mechanism provided on a push rod of a stroller configured to obtain a sufficient operation stroke of an operation wire even in a small operation space. The purpose is to provide.

Another object of the present invention is to provide a stopper mechanism for preventing erroneous operation on the operation lever, and the stopper is automatically operated when the operation lever is opened (when the lock state is maintained). It is intended to provide an opening / closing operation mechanism provided on the push rod of the stroller configured as described above.

[0009]

[Key points of the device]

 According to the present invention, an opening / closing operation unit for operating a lock mechanism of a stroller is mounted on a housing, a disc-shaped wire drive pulley rotatably mounted in the housing, and a part of the pulley is vertically slidable in the housing. And a control lever that drives the wire drive pulley to rotate, and a locking shaft protruding from the upper surface of one side of the wire drive pulley is fitted and locked to a drive plate that is vertically long on the control lever. On the upper surface of the operation lever exposed from above, a stopper made of an elastic piece formed so that the tip part can freely move up and down is formed so as to be able to move up and down, and the stopper can be detachably contacted with the outer peripheral wall of the housing. The main point of the invention is the opening / closing mechanism that is installed on the push rod of the stroller.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

The stroller of the present invention comprises a pair of front leg rods 11 and 11, a pair of rear leg rods 12 and 12, armrest rods 13 and 13, and a plurality of connecting rods 14 ... 14 that connect them in the width direction, and an upright position. This is a publicly known one that is configured to be foldable by a hand-pushing rod 15 pivotally attached so that the position can be changed in the front-back direction of the seat.

The hand-pushing rod 15 is formed so that its front surface has an inverted U-shape, and the base end portion of the hand-pushing rod 15 is provided at an intermediate portion in the lengthwise direction of the rear leg rod 12 via a folding operation bracket 16. It is pivotally attached.

Reference numeral 17 denotes a lower end portion of the hand push rod 15, more specifically, a lock mechanism which is attached to a position slightly higher than a pivotally connected portion with the bracket 16 so as to be able to move up and down. The bracket 16 for folding operation is restricted from being operated in the opening direction by being fitted and locked to the section.

The lock mechanism 17 is unlocked by a slider 18 that moves up and down by an operating wire 3 guided by an opening / closing operation portion 2 provided on a push rod 15, and protrudes from a side surface of the slider 18. The drive shaft 19 is engaged with a part of the lock mechanism 17.

The structure of the slider 18 and the structure for engaging the drive shaft 19 projecting from the slider 18 with the lock mechanism 17 are described in Japanese Utility Model Application Laid-Open No. 61-48866 and No. 63-86866. Since it is publicly known from the description of Japanese Patent No. 34766, etc., detailed description thereof will be omitted.

The opening / closing operation section 2 is composed of a housing 4, a wire driving pulley 5 rotatably mounted in the housing 4, and an operating lever 6 for driving the rotation of the wire driving pulley 5.

The housing 4 is formed in the shape of a box with a hollow inside, and openings are formed at both ends of the box for fitting the ends of the hand push rods 15, and the box An opening is formed on the lower surface for fitting the operation lever 6 in a vertically movable manner.

The wire driving pulley 5 is formed in a disk shape having an appropriate thickness, and has a central portion rotatably fixed to the housing 4 via a support shaft 41.

A guide groove 51 into which the operation wire 3 can be fitted is formed in the peripheral portion of the wire driving pulley 5, and a ball provided at the end of the operation wire 3 is formed in a part of the guide groove 51. A locking portion 52 for fitting and locking the terminal 31 (locking portion) is formed.

Reference numeral 53 is a locking shaft projecting on the upper surface of one side near the peripheral edge of the wire driving pulley 5, and is fitted into a fitting hole 63 of a drive plate 62 formed vertically in the operation lever 6. .

The operation lever 6 attached to the housing 4 is formed in a thick L-shape by a lever main body 61 and a drive plate 62 projecting vertically inward from the lever main body 61. The upper half is mounted so as to be hidden in the housing 4.

Reference numeral 64 denotes a stopper formed in a portion of the operation lever body 61 exposed on the lower side of the housing 4, and is surrounded by a notch groove by notching a part of the lever body 61 in a U shape. The tip end portion is formed as an elastic piece capable of ascending and descending inside, and the tip end portion of the elastic piece in the raised state can be brought into contact with and locked to the outer peripheral wall of the housing 4.

It should be noted that in order to accurately bring the stopper 64 and the housing 4 into contact and lock with each other, it is desirable that a part (tip portion) of the stopper 64 be formed thick.

Reference numerals 42 and 42 are guide grooves formed in the housing 4 for guiding the smooth sliding of the operation lever 6, and are fitted with projections (not shown) provided on the back surface of the operation lever body 61. This ensures that the operating lever 6 slides accurately along this, and also restricts the operating lever 6 from coming off the housing 4.

Reference numeral 65 denotes a return spring for the operating lever 6, which has one end abutting against the inside of the operating lever 6 and the other end abutting on an appropriate position inside the housing 4. A force is applied to the position where the operation lever 6 does not operate (downward direction in FIG. 4).

In the attached drawings, FIG. 6 is an explanatory diagram comparing the drive stroke of the operation wire with the rotation of the wire drive pulley according to the present invention and the drive stroke of the operation wire by the known link type lever.

In the drawings, the symbol a corresponds to a support shaft 41 that pivotally supports the central portion of the wire driving pulley 5 according to the present invention, and in a known link-type lever structure, corresponds to a shaft support point of an operating lever (link). Further, the symbol b is the locking portion of the operation wire provided at the tip end thereof. (A part corresponding to the locking part 52 in the present invention, and a part corresponding to the locking part at the tip of the lever in the known link type lever)

When the wire driving pulley 5 of the present invention is rotated by 90 degrees from point A to point B, the operating wire 3 is moved along the guide groove 51 formed in the peripheral portion of the wire driving pulley 5. Is the arc 1 between the points AB. On the other hand, in the case of the known link type lever, it is attached to the tip of the operating lever when the operating lever is rotated by 90 degrees as described above. It can be understood that the movement amount of the operation wire 3 is large when the drive pulley 5 of the present invention is used because the movement amount of the operation wire is the string s between points AB and l> s.

[0029]

[Effect of device]

 As described above, the present invention provides a housing 4, an opening / closing operation unit 2 for opening and closing a stroller lock mechanism, a disk-shaped wire drive pulley 5 rotatably mounted in the housing 4, and A drive plate 62 formed on the operation lever 6 is formed into a disc-shaped wire drive pulley 5 by being configured by an operation lever 6 which freely slides in the housing 4 to drive the rotation of the wire drive pulley 5. Since it is configured to fit the protruding locking shaft 53, when the operating lever 6 is pushed into the housing 4, the driving plate 62 protruding at the tip of the lever body 61 causes the wire driving pulley 5 to rotate. When the wire drive pulley 5 is rotated, the operation wire 3 is moved immediately so that the operation lever 6 is pushed in a linear motion for wire drive. There is an advantage that can be easily changed into a rotational movement of the Ri 5.

Further, according to the present invention, as illustrated in FIG. 6, the operation wire 3 is moved by rotating the wire driving pulley 5 formed in a disk shape, and the operation wire 3 is moved by the wire driving pulley. Since it is configured to be performed along the outer peripheral edge of the wire 5, even when the wire driving pulley 5 having the same axial distance as that of the operation lever in the conventional link type structure is used, an advantageous working stroke can be obtained in comparison therewith. It has the excellent effect of being able to do things.

The above advantages of the present invention meet the demand for downsizing of various devices provided in the stroller, and although the movement amount of the operation wire 3 is the same as the conventional one, the remote operation unit 2 provided in the hand push rod is used. It is guaranteed to make the structure of the compact.

Further, according to the present invention, a part of the operation lever main body 61 is cut out in a U shape, and a region surrounded by the U shaped cutout is formed as a stopper 64 made of an elastic piece whose tip portion can move up and down. In addition, since the tip portion of the stopper 64 abuts against the outer peripheral wall of the housing 4 and is locked, the stopper 64 provided on the operation lever 6 and the outer peripheral wall of the housing 4 are unlocked. The operation lever 6 cannot be pushed in until afterward, and there is an advantage that the lock mechanism releasing accident due to the unexpected rotation of the wire driving pulley 5 can be positively prevented.

Furthermore, since the stopper 64 of the present invention is elastically configured so that the tip end portion can freely move up and down in the operation lever body 61, when the lock mechanism is released, the operation lever 6 is pushed in. Since the pushing force of the fingertip can be used to push down the stopper 64 at the same time, there is an operational convenience that does not require a special operation for releasing the stopper mechanism unlike the conventional mechanism.

Further, since the structure is simple and the number of parts used is small, there is an advantage in the assembling process and an advantage that the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a stroller showing a mounting portion of an opening / closing operation mechanism.

FIG. 2 is an enlarged perspective view of a main part in the same figure.

FIG. 3 is a perspective view in which a part of the opening / closing operation mechanism is separated and enlarged to be omitted.

FIG. 4 is a plan view of an essential part showing a part of the housing removed.

FIG. 5 is a plan view showing a relationship between an operation lever and a wire driving pulley.

FIG. 4 is an explanatory diagram showing operation strokes of a wire driving pulley and an operation lever having a conventional structure.

[Explanation of symbols]

 15 Hand push rod 16 Bracket 17 Lock mechanism 2 Open / close operation mechanism 3 Operation wire 31 Spherical terminal 4 Housing 41 Support shaft 42 Guide groove 5 Wire drive pulley 51 Guide groove 52 Locking part 53 Locking shaft 6 Operation lever 61 Lever body 62 Drive plate 63 Fitting hole 65 Return spring

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[Procedure amendment]

[Submission date] September 9, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view of a stroller showing a mounting portion of an opening / closing operation mechanism.

FIG. 2 is an enlarged perspective view of a main part in the same figure.

FIG. 3 is a perspective view in which a part of the opening / closing operation mechanism is separated and enlarged to be omitted.

FIG. 4 is a plan view of an essential part showing a part of the housing removed.

FIG. 5 is a plan view showing a relationship between an operation lever and a wire driving pulley.

FIG. 6 is an explanatory diagram showing operation strokes of a wire driving pulley and an operation lever having a conventional structure.

[Explanation of symbols] 15 Push rod 16 Bracket 17 Lock mechanism 2 Opening / closing operation mechanism 3 Operating wire 31 Spherical terminal 4 Housing 41 Support shaft 42 Guide groove 5 Wire drive pulley 51 Guide groove 52 Locking part 53 Locking shaft 6 Operation Lever 61 Lever body 62 Drive plate 63 Fitting hole 65 Return spring

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (2)

[Scope of utility model registration request] 1. A box-shaped housing having a hollow portion inside,
A disk-shaped wire-driving pulley rotatably mounted in the housing and a body slidably mounted so that a part of the main body is exposed to the outside of the lower surface of the housing, and a vertically elongated projection toward the inside of the housing. The drive plate is composed of an operation lever that is locked to a part of the wire drive pulley, and the wire drive pulley has a guide groove for the operation wire and an end portion of the operation wire at the peripheral edge thereof. A locking portion for locking is formed, and a locking shaft that fits and locks with the drive plate of the operating lever is provided on the upper surface of one side of the locking portion, and the operating lever has a vertically long driving plate inside the lever body. Is formed so as to have a thick L-shape, a fitting hole into which the locking shaft formed in the wire driving pulley is fitted is formed at the tip of the drive plate, and the operation lever body is provided. Cut a part of it Tip forms a stopper that the elastic pieces freely elevating vertically movably by Kukoto,
An opening / closing operation mechanism provided on a push rod of a stroller configured such that a tip portion of the stopper releasably abuts on an outer peripheral wall of the housing. 2. The opening / closing operation mechanism provided on the push rod of the stroller according to claim 1, wherein both ends of the housing can be fixed to the push rod of the stroller.