JP2006298161A - Steering device of tricycle for child - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of safely/reliably steering a front wheel by a guardian from the rear side even when the intention is not agreed in the turning direction of the front wheel between a child holding a steering wheel and the guardian holding a hand-push handlebar from the rear side. <P>SOLUTION: A steering wheel stem 37 of a steering wheel H2 is divided into a pair of a lower steering wheel stem 37b and an upper steering wheel stem 37a which is inserted in a hollow part thereof. A separate turnable sleeve 40 is interposed therebetween. A horizontal clutch pin 65 penetrating the turnable sleeve 40 and the lower steering wheel stem 37b is elevated/lowered by a changing operation lever 63 and a cam panel 64 from the lower side while against the press-down elastic force. When the clutch pin 65 is lowered, the pair of upper and lower steering wheel stems and the turnable sleeve are integrally turned with each other. When the clutch pin 65 is elevated, the pair of upper and lower steering wheel stems 37a, 37b and the turnable sleeve 40 are set to be relatively and freely turnable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a steering device for an infant tricycle.

The steering handle that the infant sitting on the saddle grips and the push handle that the guardian manually pushes the body frame from the back are fixed in the same left and right direction by a rod and wire of a certain length that can move forward and backward. In the tricycle for infants that are linked and connected to each other so that the front wheels can rotate, even if the intentions of the infant and the guardian do not coincide with each other, the guardian can The present inventor previously proposed utility model registration No. 3093795 as a steering device that can safely and reliably steer front wheels.
Utility Model Registration No. 3093795

  However, in the configuration shown in the first embodiment of the known device, the steering stem (31) of the steering handle (H2) faces the steering handle receiving port tube (30) of the vehicle body frame (F). Since the upper handle stem (31a) and the lower handle stem (31b) are separated into a pair from the vertical position, the steering handle receiving port tube (30) of the body frame (F) is first moved downward. The lower handle stem (31b) to which the front wheel (50) is attached and the upper handle stem (31a) from which the handle bar (32) protrudes from above are inserted, and the lower handle stem (31b) The core shaft (36) must be fitted to the sheath shaft (51) of the upper handle stem (31a), and the front wheel (50) rolls at that time. In tricycle user, safely and reliably to be done is extremely difficult, as manufacturers it is inevitable to shipped as assembled finished product at the factory, it takes the cost of such expensive packaging and transport.

  Also, as the assembled product, the neck of the vertical shaft (36) planted from the upper end of the lower handle stem (31b) and the sheath shaft embedded and integrated in the lower end of the upper handle stem (31a) The bearing boss (53) of (51) is in a freely inserted and fitted state, and there is no elastic member that absorbs rattling movement along the vertical direction, so the steering handle (H2) is lifted The lower handle stem (31b) attached to the front wheel (50) is lowered to give the user anxiety about the assembly accuracy.

  Not only the fitting surface between the longitudinal axis (36) and the sheath shaft (51), but also the fitting surface between the elevating sleeve (56) and the decorative cover (57), the front rotation plate (40) and the support ring. (38) and the fitting surface with the cover case (46) also need a clearance allowing the rotation thereof, so that it is easy to play back and forth along the front-rear direction and the left-right direction, and the assembled state is stable. Inferior. Such problems become more prominent as the assembly work is facilitated.

  Furthermore, a special front rotating plate (40) pivotally connected to the front end portion of the advance / retreat rod (43) is required, and the support ring (38) of the front rotating plate (40) is connected to the lower handle stem ( Since it has to be welded to 31b), there is also a problem that the manufacturing cost becomes very expensive.

  The present invention aims to improve such problems, and in order to achieve the object, in claim 1, a steering wheel gripped by an infant seated on a saddle and a car body frame are pushed by a guardian from behind. In the steering device for a tricycle for infants, which is connected to the hand handle to be operated by a pair of left and right rods capable of moving back and forth in the front-rear direction so that they can rotate in the same left-right direction.

  The handle stem of the steering handle for the infant is inserted into the steering handle receiving port tube of the body frame from below, and is inserted into the hollow interior of the lower handle stem from above, and is inserted from above into the hollow inside of the lower handle stem. Split into a pair with a narrow and short upper handle stem,

  On the other hand, the upper part of a separate rotating sleeve interposed between the pair of inner and outer sides is fastened to the upper handle stem so as to be integrally rotatable by a taper screw plug operated to be pulled up from the outside,

  Similarly, the lower part of the rotating sleeve is pivoted to the lower handle stem by a horizontal penetrating pin so that it can rotate freely by a certain angle.

  A substantially T-shaped clutch pin receiving hole that opens forward in the middle of the lower handle stem, and a vertical clutch pin receiving length notched in the corresponding mid-height position of the rotating sleeve. A horizontal clutch pin parallel to the penetrating pin is passed through between the holes, and a pressing and pressing biasing force from above is applied to the presser plate of the clutch pin,

  The lower handle stem includes a cam panel that pushes down the clutch pin and resists the biasing force from below, and a switching operation lever that raises and lowers the cam panel by a certain lifting stroke corresponding to the clutch pin receiving slot. And insert it into

  When the cam panel is lowered, the clutch pin is constrained to a low position that penetrates the round hole portion of the T-shaped clutch pin receiving hole and the clutch pin receiving long hole, thereby rotating the pair of upper and lower handle stems. The sleeve rotates integrally with the sleeve in a horizontal direction by a certain angle,

  When the cam panel rises in response to the turning operation of the switching operation lever, the clutch pin reaches the high position that penetrates the horizontal long hole portion of the clutch pin receiving hole and the clutch pin receiving long hole, The pair of upper and lower handle stems and the rotation sleeve are set so as to be relatively freely rotatable by a certain angle.

  According to the second aspect of the present invention, the top cap and the bottom cap are integrally attached to the upper and lower end portions of the steering handle receiving port tube, and the pins interposed between the upper and lower sides of the top cap and the clutch pin presser disc. While winding the presser spring around the lower handle stem,

  While passing the clutch pin presser board and the cam board non-rotatably through a pair of left and right lifting guide columns inserted between the top cap and the bottom cap and standing upright,

  The cam control lifting / lowering switch operating lever is led forward from the steering handle receiving port tube so that the cam panel can be rotated from side to side around the lower handle stem. .

  In the configuration of claim 3, the mudguard cover is attached to the front fork continuously branched from the lower handle stem so as to be able to rotate integrally,

  The front end of the advance / retreat rod is inserted into the mudguard cover from above and locked.

  In the configuration of claim 4, the pair of left and right advance / retreat rods are surrounded by the upper cover case fixed to the vehicle body frame and the lower cover case detachably attached to the upper cover case so as to be movable forward and backward. It is characterized by that.

  Further, according to the fifth aspect of the present invention, the steering handle receiving port tube is separated from the vehicle body frame, and the hitch that projects rearward and integrally from the steering handle receiving port tube is detachably inserted into the hollow inside of the vehicle body frame. And, it is characterized by being connected and integrated by a through bolt and its fixing nut.

  According to the first aspect of the present invention, the pair of upper and lower handles forming a steering handle for an infant is formed by rotating the switching operation lever to the left or right and lowering the cam panel to lower the clutch pin. Since the stem and the rotation sleeve are integrally rotated in the left-right direction by a certain angle, the front wheel can be steered from the infant sitting on the saddle.

  Then, when the switching lever is turned in the opposite direction to the other, and the cam panel is raised, the clutch pin is also raised, and the pair of upper and lower handle stems and the turning sleeve are relatively fixed by a certain angle. Therefore, even if the infant and the guardian do not agree, the guardian can steer the front wheel from the rear of the body frame without hindrance. As a result, there is no danger to the infant.

  Further, the switching operation lever, the cam plate which is moved up and down by this, and the presser plate of the clutch pin are inserted into the lower handle stem of the steering handle for the infant, and are pressed against the upper side. Since an urging force is applied, there is no risk of rattling and moving in the front-rear direction, the left-right direction, and the up-down direction, and the assembly accuracy and stability are remarkably excellent.

  In particular, if the configuration of claim 2 is adopted, the rotation of the clutch pin presser plate and the cam plate can be prevented by a pair of left and right lifting guide columns, and a state of pressing down and pressing force from above is provided. There is an effect that a certain clutch pin presser board and cam board can be moved up and down correctly and straightly by a switching operation lever that is rotated around the lower handle stem.

  If the structure of Claim 3 is employ | adopted, the mudguard cover integrally attached to the front fork of the lower side handle stem can also be used, and the front-end part of an advance / retreat rod can be inserted and latched, A special member for locking the front end portion is not necessary, and it is useful for the mudguard makeup effect of the front wheel and the manufacturing cost reduction.

  If the structure of Claim 4 is employ | adopted, the safety | security and makeup | decoration effect as a tricycle for infants can be given up by enclosing the advancing / retreating rod to the front-back direction.

  Further, if the structure of claim 5 is adopted, a steering handle receiving mouth tube incorporating a steering handle for infants, a switching operation lever, a cam panel, a clutch pin, a clutch pin presser board, etc., and a vehicle body frame are provided. It can be disassembled and packed and transported in its compact size, and even a user who purchased a tricycle for infants can be easily assembled and used.

  Hereinafter, a specific configuration of the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 27 showing the tricycle for infants, (F) is a body of a square steel pipe extending in a downwardly inclined state with a gentle angle. A frame, (1), is a channel groove type steel push handle support base welded along the lower surface thereof, and projects rearward from the rear end of the vehicle body frame (F) by a certain length.

  (2) and (3) are a pair of front and rear saddle cradles welded to the upper surfaces of the vehicle body frame (F) and the handwheel support base (1), respectively, thereby supporting the saddle (4) from below. Yes. (5) is a horizontal pivot pin of the saddle (4) with respect to the front saddle cradle (2), and (6) is interposed between the bottom of the saddle (4) and the rear saddle cradle (3). This suggests a buffer spring.

  (7) shows the rear frame of the vehicle body frame (F) and the rear side of the vehicle body frame (F) as a steeply lowered rearward inclined state that crosses between the front and rear of the rear end portion of the vehicle body frame (F) and the rear saddle cradle (3) It is a round steel pipe rear fork welded to the saddle cradle (3), and a pair of left and right rear wheels (9 ) Is pivotally attached. (10) is a horizontal step which is then welded to the middle part of the axle (8), to which a synthetic resin accessory box (11) is detachably attached via a screw fastener (not shown). It has been.

  Further, (12) is a handle handle receiving mouth tube which is welded to the rear end portion of the handle handle support base (1) in an upright state, and is made of a synthetic resin with a cap (13) in the upper half thereof. A decorative cylinder (14) is integrally attached. Moreover, a pair of left and right handwheel handle rotation guide holes (15) that are in communication with each other as shown in FIGS. 3 and 4 are located at midway height positions of the handwheel handle receiving mouth tube (12) and its decorative tube (14). Is cut out horizontally.

  The decorative tube (14) is for covering the upper end of the opening of the receiving port tube (12) with a cap (13) when a hand handle described later is pulled out.

  (16) is a rotating sleeve of a round steel tube inserted from below into the inside of the hand handle receiving mouth tube (12), and the hand handle is received at the lower end protruding from the hand handle support base (1). A rear rotating plate (17) having a diameter larger than that of the mouth tube (12) is welded in a fitted state. The rear rotating plate (17) has a substantially rhombus or oval shape in plan view, and a pair of left and right rod receiving holes (18) are formed in the rear rotating plate (17). Receive and lock.

  (H1) is a push handle for a guardian for manually pushing the tricycle from the rear, and is composed of a handle grip (19) made of a synthetic resin and a handle stem (20) of an extendable steel pipe. The lower end portion 20) which is thinly drawn is inserted into the rotary sleeve (16) by a predetermined depth from above and is erected. (21) is a synthetic resin rotating fastening ring for adjusting the expansion / contraction length of the handle stem (20), and can be tightened or relaxed.

  Further, (22) is a bolt receiving hole in which the handle stem (20) and the rotating sleeve (16) are in communication with each other and corresponds to the horizontal rotating guide slot (15) for the hand handle. A horizontal through bolt (23) that opens at a midway height and skews the entire handle handle receiving tube (12), decorative tube (14), rotating sleeve (16) and handle stem (20). The handle nut (24) prevents the handle stem (20) of the push handle (H1) from coming out upward. In addition, the rotating sleeve (16) is also prevented from dropping downward.

  As a result, the handle stem (20) and the rotation sleeve (16) of the handwheel handle (H1) are maintained in a state where they can rotate integrally with each other via the through bolt (23). As a guardian of the hand, while holding the handle grip (19) of the push handle (H1), the rear rotating plate (17) of the rotating sleeve (16) is fixed along the rotating guide long hole (15). It can be rotated by an angle (θ) (for example, a total of about 90 degrees in about 45 degrees in the left-right direction), and the front wheels can be steered from the rear of the body frame (F).

  On the other hand, (25) is a steering handle receiving tube for a thick round steel pipe, and a channel groove type steel hitch (26) protruding rearward integrally from the vicinity of the lower end of the trunk surface is as shown in FIGS. The vehicle body frame (F) is inserted into and fitted into the body frame (F) so as to be freely inserted and removed, and is connected and integrated by a vertical through bolt (27) and its fixing nut (28).

  (29) is a synthetic resin cover cap tube inserted into the steering handle receiving port tube (25) from above, and a relief notch provided as a rearward open state at the lower end of the body surface. (30) is kept in a fixed state where it does not rotate by straddling the body frame (F).

  (31) and (32) are control levers that are notched in a communicating state that opens forward toward the lower end of the body surface of the steering handle receiving port tube (25) and the cover port tube (29). It is a lead-out window and extends in a horizontal rectangle as shown in FIG.

  Similarly, (33) and (34) are a pair of cap positioning key grooves that are notched in a symmetrical manner and open to the upper and lower ends of the body surface of the steering handle receiving port tube (25). Yes, it is for positioning when a top cap (35) and a bottom cap (36), which will be described later, are assembled to the steering handle receiving port tube (25).

  (H2) is a steering handle for an infant seated on the saddle (4). As a separate object from the vehicle body frame (F), the steering stem (37) has the steering handle receiving tube (25 In the case of the present invention, this is divided into upper and lower pairs.

  That is, as shown in FIGS. 7 and 8, the handle stem (37) of the steering handle (H2) for infants is an upper handle of a relatively thin and short round steel pipe that hangs down integrally from the center of the handle bar (38). It consists of a stem (37a) and a lower handle stem (37b) of a thick and long round steel pipe that stands up integrally from the corresponding central part of the front fork (39), and into the lower handle stem (37b). The upper handle stem (37a) is inserted from above and is in a concentric state.

  In addition, a rotating sleeve (40) of a separate round steel pipe is inserted and inserted between the inside and outside of the upper handle stem (37a) and the lower handle stem (37b). It has a triple structure. In that case, the lower handle stem (37b) and the rotating sleeve (40) are longer than the steering handle receiving port tube (25) and the cover port tube (29), and are exposed tall from the upper ends of these openings. It will be.

The lower end portion of the thin and short upper handle stem (37a) is cut as an inclined tapered surface, and the inclined tapered surface (41) aligned with the cut edge is formed in a wedge shape of a separate steel ingot formed corresponding to the upper end portion. The key plug (tapered screw plug) (42) is kept in a screwed and fastened state with a long hanger bolt (43) that is inserted and suspended from the center portion of the handle bar (38).

  If the hanger bolt (43) is rotated from above with a tool (not shown) such as a wrench or spanner, the key plug (42) is lifted and screwed, and the inclined tapered surface (41). Due to this distortion, the rotary sleeve (40) is strongly pressed against the inner peripheral surface, and the rotary sleeve (40) and the upper handle stem (37a) are fastened and integrated. As a result, there is no possibility that the upper handle stem (37a) will come out upward.

  Similarly, if the hanger bolt (43) is rotated in the opposite loosening direction, the key plug (42) is pulled down and the crimping force on the rotating sleeve (40) is released. The upper handle stem (37a) can be extracted upward from the rotating sleeve (40), and the vehicle body frame (F) can also be kept in an exploded state.

  A synthetic resin mudguard cover (44) is integrally attached to the front fork (39) of the lower handle stem (37b) from above, and the mudguard cover (44) and the front fork ( 39) can rotate together. (45) is a mounting boss of the mudguard cover (44) which is inserted into the lower handle stem (37b) and is fitted, and has a disk shape substantially the same size as the cover tube (29). A pair of left and right rod receiving holes (46) are formed in the upper surface. (47) is a seat for the mounting boss (45), and is welded near the lower end of the lower handle stem (37b).

  (48) is a pair of front and rear horizontal rotation guides which are located below the seat (47) of the mounting boss (45) and are cut out near the lower end of the rotation sleeve (40). A hole (49) is a pair of front and rear pin receiving holes communicating with each other correspondingly, and is formed in the lower handle stem (37b). These horizontal through pins (50) are shown in FIG. As shown in FIGS. 12 to 12, the rotating sleeve (40) and the lower handle stem (37b) are kept skewered.

  As a result, the rotating sleeve (40) does not come out upward from the lower handle stem (37b) and does not descend along a vertical clutch pin receiving slot which will be described later. 40) and the lower handle stem (37b) can be relatively rotated along the rotation guide slot (48) by a fixed angle (θ) (about 90 degrees as exemplified above). .

  In this case, since the rotating sleeve (40) and the upper handle stem (37a) are fastened and integrated through the key plug (42) as described above, the upper handle stem (37a) is also integrated with the lower handle stem. (37b) can be rotated together.

  Reference numeral (51) denotes a pair of front and rear clutch pin receiving holes cut out in the middle height position of the lower handle stem (37b), and a rotation guide elongated hole (48) of the rotation sleeve (40). It opens in a substantially T-shape when viewed from the front with a horizontal long hole portion (51x) extending in parallel and a round hole portion (51y) continuous downward from the central portion of the long hole portion (51x). ing.

  Reference numeral 52 denotes a pair of front and rear vertical clutch pin receiving slots which are notched at a corresponding mid-height position of the rotating sleeve 40, and the clutch pin in the lower handle stem 37b. As shown in FIGS. 9 to 11, the receiving hole (51) has an opening width that communicates with the round hole (51 y) and is orthogonal to the elongated hole (51 x) of the clutch pin receiving hole (51). It communicates and accepts a horizontal clutch pin which will be described later.

  Furthermore, the horizontal long hole portion (51x) of the clutch pin receiving hole (51) relatively rotates the lower handle stem (37b) and the rotation sleeve (40) by the predetermined angle (θ) ( The round hole portion (51y) of the clutch pin receiving hole (51) is also locked (integrally rotated) so that it cannot rotate relative to the clutch pin receiving hole (51). A vertical clutch pin receiving elongated hole (52) of the rotating sleeve (40) that matches and communicates with them defines a lifting / lowering stroke (S) (for example, about 12 mm) of the clutch pin described later.

  The top cap (35) and the bottom cap (36) mentioned above are integrally molded from a synthetic resin into a disk shape having substantially the same size and shape as shown in FIGS. The left and right pair of lifting guide column receiving holes (53) and (54) are distributed. In the case of the illustrated example, the elevating guide column receiving hole (53) on the top cap (35) side is small, and the elevating guide column receiving hole (54) on the bottom cap (36) side is large. There is no problem even if openings are formed in the same size.

  Then, as shown in FIGS. 6 and 7, the peripheral edge of the top cap (35) is inserted into the upper edge of the opening of the steering handle receiving port tube (25) as shown in FIGS. In addition to being attached and fixed to the body surface of the direction handle receiving port tube (25) with a plurality of screws (56), the center portion of the top cap (35) is also used as a core tube (57), and the lower handle stem (37b) It is in a state where it is inserted into the sleeve.

  On the other hand, the peripheral portion of the bottom cap (36) is also used as a holding flange (58), and is inserted into the lower edge of the opening of the steering handle receiving port tube (25) in a holding state, and the steering handle receiving port tube is inserted. In addition to being fixed to the body surface of (25) by a plurality of screws (59), the center portion of the bottom cap (36) is also inserted into the lower handle stem (37b) as a core tube (60). It is fitted.

  In that case, the clamping flanges (55) and (58) of the top cap (35) and the bottom cap (36) remain as positioning keys (61) and (62), respectively, in a part facing forward. By fitting into the corresponding cap positioning key grooves (33) (34) of the steering handle receiving port tube (25), the lifting guide column receiving hole (53) on the top cap (35) side and the bottom The elevating guide strut receiving hole (54) on the cap (36) side faces the pair of right and left sides correctly.

  (63) (64) (65) (66) (67) (68) attaches the top cap (35) to the steering handle receiving port tube (25), and then covers the steering handle receiving port tube. (25) shows a switching operation lever, a cam panel, a clutch pin, a pin presser board, a spring receiving plate, and a pin presser spring which are inserted and set so as to be sequentially stacked from above.

  Of these, first, the switching operation lever (63) is cut out from the steel plate into an annular shape as shown in FIGS. 17 and 18, and is inserted so as to be rotatable around the lower handle stem (37b). Yes. Moreover, it is in a horizontal installation state that is stably supported from below by the bottom cap (36) of the steering handle receiving port tube (25).

  (69) is a pair of left and right engaging claws bent upward from the periphery of the switching operation lever (63), and (70) is the steering handle receiving tube (25) from the periphery of the operation lever (63). ) And a nose piece extending forward and extending through the operation lever lead-out window (31) (32) of the cover tube (29), and a synthetic resin knob (attached and integrated to the bent tip) ( 71), the operation lever (63) can be rotated by a fixed angle (θ) along the lead-out windows (31) and (32).

  Next, as shown in FIGS. 19 to 23, the cam board (64) has a stepped cylindrical shape having a relatively small diameter upper board (64a) and a large diameter lower board (64b). As an integrally molded synthetic resin product, it is also inserted and fitted into the lower handle stem (37b).

  (72) is a pair of left and right groove cams cut into a substantially inverted letter shape in a side view as a rotationally symmetric form (spiral form) to the lower board (64b) of the cam board (64). The engaging claw (69) of the switching operation lever (63) is adapted to engage with the inclined tapered surface (73), which is the ceiling surface of (72), from below as shown in FIGS. .

  (74) is a pair of left and right lifting guide column receiving holes formed through the lower plate (64b) of the cam panel (64), and the lifting guide column receiving holes of the top cap (35) and the bottom cap (36). (53) Corresponds to (54).

  A pair of right and left lifting guide columns (75) are vertically fixed in an inserted state in the vertical guide column receiving holes (53) and (54) of the top cap (35) and the bottom cap (36). The lifting guide column receiving holes (74) of the lower plate (64b) are inserted into the lifting guide column (75).

  Therefore, when the switching operation lever (63) is rotated, the cam panel (64) is moved through the engagement between the engaging claw (69) and the groove cam (72). The cam board (64) is not rotated. The lift stroke (S) of the cam board (64) is substantially equal to that of the clutch pin (65).

  On the other hand, a pair of front and rear clutch pin receiving grooves (76) are cut out in the upper plate (64a) of the cam plate (64), and correspond to the notch opening width of the clutch pin receiving grooves (76). The clutch pin (65) can be rotated by a certain angle (θ) (a total of about 90 degrees as exemplified above).

  As seen from FIGS. 5 to 8, the clutch pin (65) has the clutch pin receiving hole (51) of the lower handle stem (37b) and the vertical clutch pin receiving length of the rotating sleeve (40). The front and rear end portions of the clutch pin (65) exposed from the lower handle stem (37b) are horizontally penetrated through the hole (52), and the clutch pin receiving groove (76) of the cam panel (64). Thus, the engaged state is received from below.

  The previous pin presser plate (66) is formed from a synthetic resin into a disk shape as shown in FIGS. 24 and 25, and presses the clutch pin (65) from above, and also has a lower handle stem (37b). It is in a state where it is inserted into the sleeve. Reference numeral (77) denotes a pair of left and right lifting guide column receiving holes penetratingly formed at the peripheral edge of the pin presser plate (66), and is inserted into the lifting guide column (75). (78) is a pair of front and rear presser foot receiving holes formed through the peripheral edge of the pin presser plate (66), and receives a pin presser foot (to be described later) of the spring receiving plate (67) to prevent interference therewith. It is out.

  It is desirable that a pair of front and rear shallow arc grooves (not shown) be cut out on the lower surface of the pin presser board (66), thereby keeping the clutch pin (65) in an anti-vibration preventing state.

  Furthermore, the spring support plate (67) is a synthetic resin plate as shown in FIGS. 26 and 27, and a pair of front and rear pin presser legs (79) depending on the spring support plate (67) is provided with a presser foot receiving hole (78 ), The clutch pin (65) is pressed from above without rotating. Similarly, (80) is a pair of left and right relief notches provided at the peripheral edge of the spring receiving plate (67), and the lift guide column (75) is allowed to escape to prevent interference therewith.

  A pin presser spring (68) interposed between the top cap (35) of the steering handle receiving port tube (25) and the spring receiving plate (67) is connected to the lower handle stem (37b). ), And the pin presser leg (79) of the spring receiving plate (67) and eventually the pin presser board (66) are pressed against the clutch pin (65) from above by the elastic biasing force. Yes.

  In this respect, in the illustrated embodiment, a relatively weak separate auxiliary pin presser spring that is interposed between the top cap (35) of the steering handle receiving port tube (25) and the pin presser board (66). (81) is wound around a pair of left and right lifting guide columns (75), and the pin presser plate (66) is directly pressed from above, but such an auxiliary pin presser spring (81). The left and right pair and the spring receiving plate (67) are omitted, and the pin presser plate (66) is pressed from above to the clutch pin (65) only by the pin presser spring (68) stronger than this. It ’s okay to stay on top.

  (82) is a conical synthetic resin decorative cover which is crowned from above as shown in FIGS. 5 to 7 on the top cap (35) of the steering handle receiving port tube (25). The handle bar (38) of 37a) and the cover mouth tube (29) are sandwiched and fixed between each other. The front axle (83) penetrating and horizontally passing through the lower end of the front fork (39) is used as a crankshaft, and a pair of pedals (84) pivotally attached to both ends of the front axle (83) are used to turn the front axle. It goes without saying that the front wheel (85) interposed in the middle part of (83) can be driven.

  The mudguard cover (44) attached to and integrated with the front fork (39) of the lower handle stem (37b) forming the infant steering handle (H2), and the guard push handle (H1) A rotating sleeve (16) attached to and integrated with the handle stem (20) is pivotally connected via a pair of left and right advancing and retracting rods (86) having a certain length as shown in FIG. A guardian can steer the front wheel (85) from the rear of the body frame (F).

  That is, the pair of left and right advancing / retracting rods (86) are made of metal rods, and the front end portions of each piece bent downward are directed upward to the rod receiving holes (46) opened in the mounting bosses (45) of the mudguard cover (44). The rear end of each piece that is bent downward is inserted into the rod receiving hole (18) that opens to the rear rotating plate (17) of the rotating sleeve (16). It is inserted and locked from above so that it can be inserted and removed freely, and is fastened in a locked state by a fixing nut (87), and extends in the front-rear direction along the left and right sides of the vehicle body frame (F) substantially in parallel with the left and right sides. Exist.

  In addition, as is apparent from FIGS. 1 to 3, the pair of left and right forward / backward rods (86) are attached to and fixed to the upper surface of the vehicle body frame (F) and are made of an elongated synthetic resin upper cover case (88) and its upper cover. The lower cover case (88) made of a synthetic resin, which is detachably attached to the case (88) like a confectionery, is safely surrounded by the front end of the advance / retreat rod (86). There is no fear of coming off the mudguard cover (44), so that the mudguard cover can be reliably advanced and retracted. Reference numeral (90) indicates a foldable footrest pivotally attached to the lower surface of the vehicle body frame (F) so as to be undulated.

  According to the above configuration of the present invention, the steering handle (H2) for the infant is a separate object from the body frame (F), and the pitch (26) of the steering handle receiving tube (25) is set to the body frame (F). ), The upper handle stem (37a) from the lower handle stem (37b) of the steering handle (H2), and the push handle receiving port tube (12) of the push handle support base (1). Pulling out the guard handle (H1) for the guardian, pulling out the pair of left and right advance / retreat rods (86) from the mudguard cover (44) of the front wheel (85) and the rear rotating plate (17), and further moving the advance / retreat rod (86) ) Cover cases (88) and (89) can be removed from the vehicle body frame (F).

  Therefore, in the manufacturer of a tricycle for children, not only the mudguard cover (44) but also the bottom cap (36), the switching operation lever (63), the cam panel ( 64), the clutch pin (65), its pin presser plate (66), the spring receiving plate (67), the pin presser spring (68) and the top cap (35) are sequentially inserted from above, and the steering handle is inserted. If the assembled state as shown in FIGS. 5 to 7 is correctly inserted and set in the receiving tube (25), the disassembled state of the assembly unit of the steering handle (H2) and the various parts extracted above. Can be packed and transported in a compact and compact manner, even for users who have purchased the infant tricycle, There is an advantage that the goods to be easily assembled correctly use.

In any case, since the present invention has the above-described configuration, when the infant sitting on the saddle (4) himself steers the front wheel (85) by the steering handle (H2), The guardian rotates the switching operation lever (63) in the direction of the arrow (R) in FIG. 8 to keep the cam panel (64) in the lowered state.

  Then, the spring receiving plate (67), the pin presser plate (66) and the clutch pin (65) which have received the elastic biasing force of the pin presser spring (68) from above also descend as shown in FIGS. The horizontal clutch pin (65) opens to the lower handle stem (37b), the round hole (51y) of the clutch pin receiving hole (51), and the vertical clutch pin receiving length of the rotating sleeve (40). The rotation sleeve (40) and the lower handle stem (37b) are locked in a relatively non-rotatable manner by being restrained at a low position penetrating the hole (52).

  In relation to the rotating sleeve (40), a pair of front and rear rotating guide slots (48) for receiving a horizontal through pin (50) with the lower handle stem (37b) is cut out in advance. The rotating sleeve (40) and the lower handle stem (37b) have a fixed angle (θ) (about 45 degrees in the left-right direction as exemplified above) along the rotation guide slot (48). 90 degrees).

  In addition, since the upper handle stem (37a) is fastened and integrated with the rotating sleeve (40) via a wedge-shaped key plug (42), the upper handle stem (37a) and the lower handle stem ( 37b) also rotate integrally with each other so that the infant can steer the front wheel (85) from the steering handle (H2).

  At that time, the guard push handle (H1) pivotally connected via the mudguard cover (44) of the front fork (39) and the advance / retreat rod (86) is also linked with the steering handle (H2) for the infant. As a result, the hand handle (H1) is removed as a result of being rotated along the corresponding rotation guide slot (15) of the hand handle receiving port tube (12). It is desirable to cover the cap (13).

  On the other hand, when the guardian of the infant steers the front wheel (85) from the rear of the vehicle body frame (F) by the hand handle (H1), the switching operation lever (63) is moved to the arrow (L The cam panel (64) is pushed up by the engaging claw (69).

  Then, the clutch pin (65), its pin presser plate (66) and the spring receiving plate (67) also resist the urging force of the pin presser spring (68) as shown in FIGS. The horizontal clutch pin (65) rises and the horizontal long hole (51x) of the clutch pin receiving hole (51) in the lower handle stem (37b) and the vertical clutch pin receiving of the rotating sleeve (40) The lower handle stem (37b) and the rotating sleeve (40) reach a high position penetrating the elongated hole (52), and the rotating sleeve (40) extends along the rotating guide elongated hole (48). The rotation is relatively free by a certain angle (θ).

  Under such a state, if the guardian holds the hand handle (H1) and performs a turning operation in the left-right direction as shown in FIGS. 28 and 32, the turning operation force becomes the hand pushing handle (H1). ) Through the steering stem (20), the rotating sleeve (16), the rear rotating plate (17), the advancing / retracting rod (86) of a certain length, and the mudguard cover (44). ) Is transmitted to the front fork (39) of the lower handle stem (37b), the steering of the front wheel (85) can be performed.

  Thus, the lower handle stem (37b) of the infant steering handle (H2) can be rotated in the left-right direction in conjunction with the guard push handle (H1), but the steering handle (H2) The upper handle stem (37a), which is fastened and integrated with the rotating sleeve (40) via a key plug (42), has a clutch pin receiving hole (opened in the lower handle stem (37b)). Along the long hole portion (51x) of 51) and the rotation guide long hole (48) of the rotation sleeve (40), it only idles by a certain angle (θ).

  As a result, the infant grasping the handlebar (38) of the upper handle stem (37a) in the infant steering handle (H2) and the protection grasping the handlegrip (19) of the guard push handle (H1). Even if there is a disagreement in the uniqueness of the direction of rotation of the front wheel (85) between parents and guardians, the guardian can easily steer the front wheel (85) from the rear of the body frame (F). It can be done reliably and is safe for young children.

It is a side view of the tricycle for infants concerning the present invention. It is a top view of FIG. It is a sectional side view which shows the attachment state of the handwheel handle for guardians. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 2 is a partially enlarged front view of FIG. 1. It is a front view which fractures | ruptures and shows a part of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 6. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7, showing a connected state of the steering handle and the hand handle. It is a front view which extracts and shows the lower side handle stem of a steering handle. FIG. 10 is a sectional view taken along line 10-10 in FIG. 9; FIG. 11 is a cross-sectional view taken along line 11-11 in FIG. 9. FIG. 12 is a cross-sectional view taken along line 12-12 of FIG. 9. FIG. 6 is a half-broken cross-sectional view showing a top cap of a steering handle receiving port tube. FIG. 14 is a bottom view of FIG. 13. FIG. 6 is a half-broken cross-sectional view showing a bottom cap of a steering handle receiving port tube. FIG. 16 is a plan view of FIG. 15. It is a top view which extracts and shows a switching operation lever. FIG. 18 is a sectional view taken along line 18-18 in FIG. 17. It is a top view which extracts and shows a cam board. FIG. 20 is a bottom view of FIG. 19. FIG. 20 is a front view of FIG. 19. FIG. 22 is a cross-sectional view taken along line 22-22 in FIG. 19. It is a 23-23 line sectional view of Drawing 19. It is a front view which extracts and shows a pin press board. It is a bottom view of FIG. It is a front view which extracts and shows a spring receiving plate. It is a bottom view of FIG. It is a top view corresponding to FIG. 2 which shows the steering state of the front wheel by a hand handle. It is sectional drawing corresponding to FIG. 6 which shows the raising state of a cam board and a clutch pin. FIG. 30 is a sectional view taken along line 30-30 in FIG. 29. FIG. 31 is a cross-sectional view taken along line 31-31 in FIG. 30. FIG. 32 is a cross-sectional view taken along line 32-32 in FIG. 30 and corresponds to FIG. 8.

Explanation of symbols

(1) ・ Hand handle support base (4) ・ Saddle (12) ・ Hand handle receiving tube (15) ・ Rotating guide slot for hand handle (16) ・ Rotating sleeve (17) ・ Rear rotating plate ( 25) · Steering handle receiving mouth tube (26) · Hitch (27) · Through bolt (29) · Cover mouth tube (35) · Top cap (36) · Bottom cap (37) · Handle stem (37a) · Upper side Handle Stem (37b), Lower Handle Stem (38), Handlebar (39), Front Fork (40), Rotating Sleeve (41), Inclined Tapered Surface (42), Key Plug (43), Hanger Bolt (44 ) · Mudguard cover (45) · Mounting boss (46) · Rod receiving hole (48) · Rotating guide slot (49) · Pin receiving hole ( 0) ・ Through pin (51) ・ Clutch pin receiving hole (51x) ・ Long hole part (51y) ・ Round hole part (52) ・ Clutch pin receiving long hole (63) ・ Switching lever (64) ・ Cam board ( 65) ・ Clutch pin (67) ・ Spring receiving plate (68) ・ Pin presser spring (69) ・ Engagement claw (71) ・ Pinch (72) ・ Groove cam (73) ・ Inclined taper surface (75) ・ Elevation Guide post (76), Clutch pin receiving groove (79), Pin presser foot (82), Cosmetic cover (85), Front wheel (86), Forward / backward rod (F), Body frame (H1), Hand handle for guardians (H2) • Steering handle for infants (S) • Elevating stroke (θ) • Rotation angle

Claims (5)

A pair of left and right steering handles (H2) held by an infant seated on the saddle (1) and a push handle (H1) for a guardian to manually push the body frame (F) from the rear can be moved back and forth. In the steering device for an infant tricycle that is interlocked and connected so that it can be rotated in the same horizontal direction by the rod (86).
A relatively thick and long lower handle stem (37b) that is inserted through the steering handle receiving port tube (25) of the body frame (F) from below and penetrates the handle stem (37) of the infant steering handle (H2). And a pair of a thin and short upper handle stem (37a) inserted from above into the hollow interior of the lower handle stem (37b),
The upper part of a separate rotating sleeve (40) interposed between the pair of inner and outer sides can be integrally rotated to the upper handle stem (37a) by a taper screw plug (42) operated to be pulled up from the outside. While fastening as
Similarly, the lower part of the rotating sleeve (40) is pivotally supported by the horizontal handle pin (50) relative to the lower handle stem (37b) by a fixed angle (θ) so as to be freely rotatable.
A substantially T-shaped clutch pin receiving hole (51) opened forward and notched at a mid-height position of the lower handle stem (37b) and a corresponding mid-height position of the rotating sleeve (40). A horizontal clutch pin (65) parallel to the penetrating pin (50) is passed between the notched vertical clutch pin receiving slot (52) and a presser plate (65) of the clutch pin (65) is inserted. 66) is given a downward pressing bias force from above,
A cam panel (64) that holds the clutch pin (65) down and resists the urging force, and a constant lifting stroke (S) corresponding to the clutch pin receiving slot (52). ) Is inserted into the lower handle stem (37b) and is fitted into the lower handle stem (37b).
When the cam plate (64) is lowered, the clutch pin (65) is in a low position where it passes through the round hole (51y) of the substantially T-shaped clutch pin receiving hole (51) and the clutch pin receiving long hole (52). The pair of upper and lower handle stems (37a) (37b) and the rotating sleeve (40) are integrally rotated in the left-right direction by a certain angle (θ),
When the cam panel (64) is raised in response to the turning operation of the switching operation lever (63), the clutch pin (65) is also connected to the horizontal slot (51x) of the clutch pin receiving hole (51) and the clutch. Reaching a high position penetrating the pin receiving elongated hole (52), the pair of upper and lower handle stems (37a) (37b) and the rotating sleeve (40) are relatively free to rotate by a fixed angle (θ). A steering device for a tricycle for infants, characterized in that the relationship is set to be A top cap (35) and a bottom cap (36) are integrally attached to both upper and lower ends of the steering handle receiving port tube (25), and the top cap (35) and the clutch pin presser plate (66) are connected to each other. A pin presser spring (68) interposed between the upper and lower sides is wound around the lower handle stem (37b), and
The clutch pin presser board (66) and the cam board (64) are rotated to a pair of left and right lifting guide columns (75) that are inserted and raised between the top cap (35) and the bottom cap (36). While passing impossible,
The switching lever (63) for raising and lowering the cam panel (64) is led forward from the steering handle receiving port tube (25) and rotated from the outside to the left and right around the lower handle stem (37b). The steering device for a tricycle for infants according to claim 1, wherein the steering device is defined so that it can be operated dynamically. The mudguard cover (44) is attached to the front fork (39) that branches continuously from the lower handle stem (37b) so that it can rotate integrally,
The steering device for an infant tricycle according to claim 1, wherein a front end portion of the advancing / retracting rod (86) is inserted and locked into the mudguard cover (44) from above.   A pair of left and right advancing and retracting rods (86) is moved back and forth by an upper cover case (88) fixed to the vehicle body frame (F) and a lower cover case (89) removably attached to the upper cover case (88). The steering device for a tricycle for infants according to claim 1, wherein the steering device is enclosed so as to be capable of moving forward and backward.   The steering handle receiving port tube (25) is a separate body from the vehicle body frame (F), and a hitch (26) projecting backward and integrally from the steering wheel receiving port tube (25) is provided on the vehicle body frame (F). The steering device for an infant tricycle according to claim 1, characterized in that it is inserted into the hollow interior so as to be freely inserted and removed, and is connected and integrated by a through bolt (27) and its fixing nut (28).

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