JP5051497B2 - Guard rotation lock mechanism, seat with the same, and shopping cart - Google Patents

Description

  The present invention relates to a structure for attaching a guard to a seat so as to be able to swing, and in particular, a guard rotation locking mechanism capable of locking a guard in an opened state and restricting rotation, a seat provided with a guard rotation locking mechanism, and the same It relates to a shopping cart equipped with.

  In recent store facilities such as supermarkets and large-scale general merchandise stores, shopping carts are prepared for transporting products purchased by shoppers. Shoppers move through the store facilities while pushing the shopping carts, and store the products in their shopping carts. To do shopping. As described above, since a large number of products can be loaded in the shopping cart, the shopper can easily shop as compared with the case of moving with a shopping basket.

  Furthermore, recently, as shown in Patent Document 1, a shopping cart equipped with a child seat has also become widespread. In addition, since the shopping cart is moved with the child placed on the child seat, a shopping cart provided with a guard for preventing the child seat from falling off is also popular in order to prevent the child from falling from the child seat (Patent Document). 2).

  However, in the child seat of the shopping cart shown in Patent Document 2, since the guard for falling off is fixed to the child seat with screws or welding, when the child is seated on the child seat or when the child is lowered from the child seat, the child Handling was inconvenient because the feet were caught by the guard.

  Therefore, as shown in FIG. 9, when the child is seated on or lowered from the child seat, the safety guard for falling off moves so that the space between the child safety seat and the safety guard for falling off is expanded. 50 were developed.

The child seat 50 shown in FIG. 9 includes a seat body 51 and a guard 52 attached to the seat body 51 so as to be swingable. In the drawing, Fr indicates the front, Up indicates the upper side, and W indicates the width direction.
The seat body 51 is made of a synthetic resin and includes a housing portion 53 that houses a child. As shown in the figure, the accommodating portion 53 is integrally formed with a backrest portion 53A, a seat portion 53B, and an elbow rest guard portion 53C, and an accommodating space S is defined by being surrounded by them.

  The guard 52 is for preventing a child who has entered the housing portion 53 from falling off the child seat 50, and a waist belt 54 passing through the guard 52 and the backrest portion 53A forms a loop for restraining the torso of the child. Then, by adjusting the length of the belt 54, an operation in which the child seated on the seat 53B drops off from the child seat 50 is restricted.

  As shown in FIG. 9, the guard 52 is formed at the tip of the abdominal contact portion 52A, the crotch contact portion 52B extending downward from the lower end of the abdominal contact portion 52A, and the crotch contact portion 52B. The rotating portion 52C is rotatably accommodated in a receiving portion 55 that is recessed at the front edge of the seat portion 53B of the seat body 51.

As shown in FIG. 10, a rotating shaft 56 is attached to the rotating portion 52 </ b> C, and the rotating shaft 56 is rotatably supported by the receiving portion 55. A spring 57 is wound around the rotary shaft 56, and the guard 52 is urged by the spring 57 so as to always move forward. In other words, a forward urging force always acts on the guard 52 so as to widen the space between the seat body 51 and the guard 52.
Japanese Patent Laid-Open No. 2002-220055 JP 2002-29424 A

  However, the child seat 50 shown in FIGS. 9 and 10 requires the rotating shaft 56 and the spring 57 as a mechanism for opening the guard 52 by the urging force of the spring 57, and the shapes of the rotating shaft 56 and the spring 57 are both complicated. This has been a cause of increased manufacturing costs.

  SUMMARY OF THE INVENTION In view of the above, the present invention provides a guard rotation lock mechanism that has a simple structure and can maintain the posture of the guard in an opened position, thereby improving usability, a seat including the guard, and a shopping cart. With the goal.

In order to achieve the above object, one configuration of the guard rotation lock mechanism according to the present invention is a seat structure in which a guard for restricting movement of a child seated on a seat is swingably attached to a seat portion of the seat body. Has a rotating part, and the rotating part is rotatably supported by a receiving part recessed in the front edge of the seat part, and the rotating part is provided with a rotation stopper having a protruding part. Is formed with a lock groove and a recess wider than the protrusion, and the protrusion of the rotation stopper is fitted into the lock groove of the receiving portion to restrict the swinging of the guard. obtained maintaining the spacing constant, that projections are loosely fitted in the recess of the receiving portion, and characterized in that the obtained so that by swinging the guard in response to movement of the protrusion in the recess in the longitudinal To do.

In order to achieve the above object, another configuration of the guard rotation lock mechanism of the present invention is a seat structure in which a guard that restricts the movement of a child seated on a seat is swingably attached to a seat portion of the seat body. The guard includes an abdominal contact portion, a crotch contact portion extending downward from the lower end of the abdominal contact portion, and a rotation portion formed at the tip of the crotch contact portion, and the rotation portion is a seat portion The rotation portion is rotatably supported by a receiving portion that is recessed at the front edge, and the rotation portion is provided with a rotation stopper having a protrusion, and the receiving portion has a lock groove and a recess that is wider than the protrusion. There have been formed, the protruding portion of the rotation stopper is restricted swing guard by fitting the locking groove of the receiving unit, obtain and maintain the spacing between the seat body and the guard constant protrusion receiving portion By loosely fitting into the recess, the guard swings back and forth in response to the movement of the protrusion in the recess. It is characterized in that the obtained so that by.

  In each of the above configurations, the rotation stopper is formed in a substantially U-shaped cross section as a whole, and has a base portion that comes into contact with the recess formed in the rotation portion, and a protrusion that protrudes from the bottom surface of the base portion and fits into a hole formed in the recess. A curved portion extending in an arc from the edge of the base portion, an inclined portion extending from the edge of the curved portion and inclined with respect to the base portion, and a tip of the inclined portion The receiving portion is configured to be elastically deformable from the projection portion, and the receiving portion has a curved portion with a semi-circular cross section, and a locking groove is formed in the curved portion. Slides along the curved portion of the receiving portion, and the protrusion of the rotation stop fits into the lock groove of the receiving portion, whereby the guard is locked at a predetermined position.

  The lock groove is preferably formed at a position near the backrest portion of the seat body in the curved portion of the receiving portion, and the gap between the guard and the seat body in a state where the protrusion is fitted in the lock groove is This is wider than the distance between the guard and the seat body in the state where the child is seated on the abdomen.

  In the guard rotation lock mechanism of the present invention, the waist belt is inserted through the guard and the backrest portion to form a loop, and a child is placed in the loop to regulate the movement of the seated child.

  In addition, the seat of the present invention includes a seat body including a seat portion and a backrest portion, a guard that restricts the movement of a child seated on the seat portion, and includes the guard rotation lock mechanism described above. It is characterized in that the rotation of the guard is restricted.

Furthermore, one configuration of the shopping cart of the present invention includes a cart body having a plurality of traveling wheels at a lower portion, and a child seat supported by the cart body, and the child seat includes a seat portion and a backrest portion. A guard that restricts the movement of the child seated on the seat, and a guard rotation lock mechanism that restricts the rotation of the guard. The guard has a rotating portion, and the rotating portion is in front of the seat. It is supported by a receiving part recessed at the edge so as to be rotatable. The rotating part is provided with a rotation stopper having a protruding part, and the receiving part is formed with a locking groove and a recessed part wider than the protruding part. have been, projection of the rotation stopper is restricted swing guard by fitting the locking groove of the receiving unit, obtain and maintain the spacing between the seat body and the guard constant, in the recess of the protrusion receiving portion By loosely fitting, in the recess It is characterized in that the obtained so that by swinging back and forth guard in response to movement of the raised portion.

Another configuration of the shopping cart of the present invention includes a cart body having a plurality of traveling wheels at a lower portion and a child seat supported by the cart body, and the child seat includes a seat portion and a backrest portion. A seat body, a guard for restricting movement of a child seated on the seat, and a guard rotation lock mechanism for restricting rotation of the guard, the guard being below the abdominal abutment portion and the lower end of the abdominal abutment portion A crotch contact part extending to the front end of the crotch contact part, and the seat body has a receiving part recessed in the front edge of the seat part, and the rotation part Is rotatably supported by the receiving portion, and a guard is formed at the abdominal contact portion, the crotch contact portion extending downward from the lower end of the abdominal contact portion, and the rotation formed at the tip of the crotch contact portion. And the rotating part is rotatable to a receiving part recessed in the front edge of the seat part. Made is lifting, the rotating portion, the rotation stopper is provided with a protrusion, wider than the protrusion and the locking groove in the receptacle recess and is being formed, the protruding portion of the rotation stopper is receiving unit By fitting in the lock groove, the swing of the guard is restricted, the distance between the seat body and the guard can be kept constant, and the projection is loosely fitted in the recess of the receiving portion, so that the projection in the recess It is characterized in that the obtained so that by swinging back and forth guard in response to the movement.

  In each of the above-described configurations, the rotation stopper is entirely formed in a U-shaped cross section, and includes a base portion that comes into contact with a recess formed in the rotation portion, and a protrusion that protrudes from the bottom surface of the base portion and fits into a hole formed in the recess. A curved portion extending in an arc from the edge of the base portion, an inclined portion extending from the edge of the curved portion and inclined with respect to the base portion, and a tip of the inclined portion The receiving portion is configured to be elastically deformable from the projection portion, and the receiving portion has a curved portion with a semi-circular cross section, and a locking groove is formed in the curved portion. Slides along the curved portion of the receiving portion, and the protrusion of the rotation stop fits into the locking groove of the receiving portion, whereby the guard is locked at a predetermined position.

  The lock groove is preferably formed at a position near the backrest portion of the seat body in the curved portion of the receiving portion, and the gap between the guard and the seat body in a state where the protrusion is fitted in the lock groove is This is wider than the distance between the guard and the seat body in the state where the child is seated on the abdomen.

  The waist belt is inserted into the guard and the backrest part to form a loop, and the child is placed in the loop to regulate the movement of the seated child.

  According to the present invention, it is possible to maintain the state by moving the guard forward and expanding the space between the seat body and the guard with a simple structure. is there. In particular, in the present invention, since the mechanism for locking the rotation of the guard can be realized mainly by only the rotation stopper and the lock groove into which the guard is fitted, the structure is simple and the manufacturing cost is very low.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a front perspective view of a shopping cart 10 according to an embodiment of the present invention, FIG. 2 is a rear perspective view of the shopping cart 10 of FIG. 1, FIG. 3 is a front view of the shopping cart 10 of FIG. 2 is a side view of the shopping cart 10 of FIG. In the drawing, Fr indicates the front of the shopping cart, Up indicates the upper side, and W indicates the lateral width direction of the shopping cart. As shown in these drawings, the shopping cart 10 includes a cart body 100, traveling wheels 200 attached thereto, and a child seat 300 supported by the cart body 100.

  The cart body 100 constituting the shopping cart 10 is configured as a frame in which a plurality of pipes made of steel or the like are bent and joined together by welding. Specifically, the cart body 100 is disposed on the rear side of the base frame 110, a seat support frame 120 that stands from the base frame 110 and mainly supports the child seat 300. In addition, the handle frame 130 is erected from the base frame 110 and is gripped when the user pushes the shopping cart 10.

Details of the frames 110, 120, and 130 will be described below.
The base frame 110 has a pair of linear bars 111R and 111L arranged in parallel so that the distance between the base frames 110 becomes narrower toward the front, and each of these bars 111R and 111L. The first connecting bar 112 extends linearly in the horizontal width direction so as to connect the front ends.

  The base frame 110 may be configured, for example, by bending a single bar-shaped steel material so that the pair of bars 111R and 111L and the first connecting bar 112 are integrated, or the pair of bars 111R, 111L and the 1st connection rod 112 may be manufactured separately, and they may be joined and constituted as one piece. A corner formed by each of the bars 111R and 111L and the first connecting bar 112 is curved in an arc shape.

  In the base frame 110, a first installation member 114 is installed on the left and right bar members 111R and 111L at a position close to the rear ends of the left and right bar members 111R and 111L. The first erection member 114 is joined to the left and right bar members 111R and 111L, and rises upwards 114R and 114L, and is connected to the upper ends of the uprights 114R and 114L in a horizontal horizontal direction. It is comprised from the horizontal part 114C extended in the shape. The base frame 110 also spans the inner peripheral surface of the first connecting rod 112 and the first construction member 114, and the inner peripheral surface near the tip of the left and right rods 111R and 111L and the first A plurality of metal bar portions 115 are arranged so as to be hung over the construction material 114.

  The plurality of metal rod portions 115 extend in the front-rear direction substantially parallel to each other, and a plurality of metal rods are arranged in the front-rear direction so that the front end or rear end thereof is connected to the front end or rear end of the adjacent metal rod. It is formed by folding back. In addition, each metal rod portion 115 is inclined so as to gradually increase from the tip to the intermediate portion as it goes rearward, and suddenly inclines upward from the rear end of the gentle portion 115A toward the rear. A step portion 115B and a horizontal portion 115C horizontally extending rearward from the rear end of the step portion 115B are provided, and a load can be placed on these metal rod portions 115. ing. In particular, the horizontal portions 115C of the plurality of metal bar portions 115 function as a pedestal on which a shopping basket (not shown) is placed in cooperation with each other. In order to prevent the shopping basket placed on each horizontal portion 115C from moving backward and falling, the rear end portion of the adjacent metal rod portions 115 connected to each other is inclined obliquely rearward to form a stopper 115S. Has been. The horizontal portion 115C of each metal rod portion 115 is fixed to the first erection material 114 and supported from below. The slanted portion 115A of each metal bar portion 115 is also joined by welding to the second construction member 117 extending linearly in the horizontal width direction, and the rigidity of each metal rod portion 115 is enhanced.

  The lower part of the seat support frame 120 is fixed at a position away from the rear ends of the left and right bars 111R, 111L of the base frame 110 by a distance of about 1/4 of the total length of the bars 111R, 111L. First vertical bars 121R, 121L that stand up, first inclined bars 122R, 122L extending obliquely forward from the upper ends of the first vertical bars 121R, 121L, and first inclined bars 122R, 122L And a second connecting bar 123 extending linearly in the horizontal width direction so as to connect the upper ends of the two. As shown in FIG. 3, the left and right first inclined rods 122R and 122L are gently inclined inward in the width direction so that the distance between the first inclined rods 122R and 122L becomes narrower toward the upper side.

  The seat support frame 120 is formed by, for example, bending a single bar-shaped steel material so that the pair of first vertical bars 121R and 121L, the pair of first inclined bars 122R and 122L, and the second connecting bar 123 are integrated. A pair of first vertical rods 121R, 121L, a pair of first inclined rods 122R, 122L, and a second connecting rod 123 are manufactured separately and joined together as an integrated object. It may be configured. The corners formed by the first vertical bars 121R and 121L and the first inclined bars 122R and 122L and the corners formed by the first inclined bars 122R and 122L and the second connecting bars 123 are also arcuate. It is formed to be curved.

  The handle frame 130 includes second vertical bars 131R and 131L that are attached to the rear ends of the left and right bars 111R and 111L of the base frame 110 and are raised upward, and the second vertical bars 131R and 131L. Second inclined rods 132R, 132L extending obliquely forward from the upper end of the second inclined rods 132R, 132L extending obliquely rearward from the upper ends of the second inclined rods 132R, 132L, and third The third connecting bar 134 extends linearly in the horizontal width direction so as to connect the upper ends of the inclined bars 133R and 133L. As shown in FIG. 3, the left and right second inclined rods 132R and 132L and the third inclined rods 133R and 133L are gently inclined inwardly in the width direction so that the distance between them becomes narrower as it goes upward. is doing.

  For example, the handle frame 130 is also formed by bending a single bar-shaped steel material to form a pair of second vertical bars 131R, 131L, a pair of second inclined bars 132R, 132L, and a pair of third inclined bars 133R, 133L, The third connecting bar 134 may be integrally formed, a pair of second vertical bars 131R, 131L, a pair of second inclined bars 132R, 132L, a pair of third inclined bars 133R, 133L and the 3rd connection rod 134 may be manufactured separately, and what was constituted as an integrated object which joined them may be used.

  In addition, a corner formed by the second vertical bars 131R and 131L and the second inclined bars 132R and 132L, and a second inclined bars 132R and 132L and the third inclined bars 133R and 133L are formed. The corner and the corner formed by the third inclined rods 133R, 133L and the third connecting rod 134 are also curved in an arc shape. Corners formed by the second inclined rods 132R, 132L and the third inclined rods 133R, 133L are formed by the first inclined rods 122R, 122L and the second connecting rod 123 in the seat support frame 120. It is located in the rear position close to the corner.

  The left and right corners formed by the second inclined rods 132R, 132L and the third inclined rods 133R, 133L of the handle frame 130 are positioned at a rear position close to the second connecting rod 123 of the seat support frame 120. A third horizontal member 135 is provided so as to be installed. The third horizontal member 135 extends in a substantially parallel state with the second connecting rod 123 behind the second connecting rod 123 of the seat support frame 120.

  Under the corner formed by the left and right bars 111R, 111L and the first connecting bar 112 of the base frame 110, traveling wheels 200, 200 are respectively attached. The traveling wheels 200, 200 are also attached to the lower ends of the two vertical bars 131R, 131L. As a result, the shopping cart 10 has a structure including two front wheels and two rear wheels. Each wheel rolls and is supported so that each wheel can rotate 360 degrees around the vertical axis. It is possible to move and turn.

  The lower part of the child seat 300 is fixed on the second connecting rod 123 of the seat support frame 120 and the third horizontal member 135 of the handle frame 130. The child seat 300 is attached to the cart body 100 in a forward-facing state. The child seat 300 includes a seat body 310 and a guard 350 that is swingably attached to the seat body 310.

  The seat main body 310 is formed of a synthetic resin, and includes a housing portion 311 that houses a child and a cover 312 that covers the back surface of the housing portion 311. As shown in the figure, the accommodating portion 311 is integrally formed of a backrest portion 311A, a seat portion 311B, and an elbow rest guard portion 311C, and an accommodating space S is defined by being surrounded by them. A head support 370 is provided at a portion of the backrest 311A where the child's head comes into contact.

  The guard 350 is for preventing the child who has entered the housing portion 311 from falling off the child seat 300, and forms a loop that restrains the torso of the child with a waist belt 380 that passes through the guard 350 and the backrest portion 311A. Then, the length of the belt 380 is adjusted to restrict the movement of the child seated on the seat 311B from falling off the child seat.

  The child seat 300 has a built-in reclining mechanism, and the tilt angle of the child seat itself can be changed by operating a lever 390 attached to the upper cover of the rear surface of the child seat 300.

  A buffer member 118 made of rubber or the like is attached to the tip of the shopping cart 10, that is, the first connecting rod 112 of the base frame 110 in order to alleviate a collision with an obstacle such as a wall. Further, a synthetic resin grip 138 is attached to the metal third connecting bar 134 of the handle frame 130 so that the user can easily grip the handle frame 130.

  The shopping cart 10 configured as described above is configured such that the width becomes narrower as it goes from the rear to the front, and the height becomes lower as it goes forward. For this reason, the shopping cart 10 can be stacked one after another from the back of the other shopping cart 10, that is, can be nested. That is, when another shopping cart 10 is brought close to the rear of another shopping cart 10 when not in use, the front end portion of the rear shopping cart 10, that is, the front side portion of the base frame 110, is an expanded base of the front shopping cart 10. Enter the rear of the frame 110. Thereby, a plurality of shopping carts 10 can be nested before and after.

  As described above, the basic configuration of the shopping cart 10 according to this embodiment has been described. However, the shopping cart 10 according to this embodiment expands the space between the seat body 310 and the guard 350 by moving the guard 350 forward. When opened, the guard 350 moved forward can be held in that position.

  Therefore, as shown in FIG. 5, the shopping cart guard 350 according to the embodiment of the present invention includes an abdominal contact portion 351 and a crotch contact portion 352 extending downward from the lower end of the abdominal contact portion 351. , And a columnar rotating portion 353 formed at the tip of the crotch contact portion 352. The rotating portion 353 is formed with a through hole 353A into which the shaft 354 is fitted, and further, a concave portion 353B is formed on the circumferential surface. As shown in FIG. 5, a rotation stopper 355 that can be elastically deformed and bent is attached to the recess 353B.

  The rotation stopper 355 has a substantially U-shaped cross section, and has a flat base portion 355A that abuts the flat surface of the recess 353B of the rotation portion 353, and a protrusion that protrudes from the bottom surface of the base portion 355A and fits into the hole 353C of the recess 353B. A portion 355B, a curved portion 355C extending in an arc from the edge of the base portion 355A, an inclined portion 355D extending from the edge of the curved portion 355C and inclined with respect to the base portion 355A, and an inclined portion 355D And a projecting portion 355E formed at the tip. The base portion 355A, the convex portion 355B, the curved portion 355C, the inclined portion 355D, and the protruding portion 355E of the rotation stopper 355 are formed as a single body with resin. For this reason, the rotation stopper 355 is configured such that the inclined portion 355D is bent by elastic deformation in the direction of the base portion 355A via the curved portion 355C, that is, in the direction of the arrow α shown in the drawing.

The rotating portion 353 of the guard 350 configured as described above is rotatably supported by the receiving portion 360 that is recessed at the front edge of the seat portion 311B of the seat body 310.
Here, FIG. 6 is a perspective view showing the periphery of the receiving portion 360 that is recessed in the front edge of the seat portion 311B of the seat body 310. FIG. The receiving portion 360 is formed by a curved portion 361 having a semicircular cross section and side walls 362 and 362 provided on both sides thereof, and a guard 350 is formed in an area defined by the curved portion 361 and the side walls 362 and 362. The rotating part 353 is received. A through hole 363 into which the shaft 354 is inserted is formed in each of the side walls 362 and 362 of the receiving portion 360.

  The curved portion 361 of the receiving portion 360 is formed with a lock groove 365 into which the projection portion 355E of the rotation stopper 355 is fitted at a position near the backrest portion 311A. Further, the curved portion 361 is moved forward from the lock groove 365. A recessed portion 367 formed wider than the protruding portion 355E of the rotation stopper 355 is provided at a distant position.

  A rotating part 353 of the guard 350 is supported by a common shaft 354 in the receiving part 360 configured as described above, and the guard 350 is supported by the seat body 310 so as to be swingable.

Next, the operation of the guard 350 in the child seat 300 according to the embodiment of the present invention will be described.
First, the use state of the guard 350, that is, the guard use state in which the abdomen abutting portion 351 of the guard 350 abuts on the abdomen of the child will be described.
When the child is seated on the seat 311B of the child seat 300 and the abdomen abutting portion 351 of the guard 350 is in contact with the abdomen of the child, as shown in FIG. The protrusion 355E of the rotation stopper 355 is in a recess 367 that is recessed in the curved portion 361 of the receiving portion 360.

  Since the recess 367 is formed to be wider than the protrusion 355E of the rotation stopper 355, the protrusion 355E is loosely fitted in the recess 367. Accordingly, since the protrusion 355E can move within the recess 367, the antinode portion 351 of the guard 350 can also slightly swing in the front-rear direction corresponding to the movable range of the protrusion 355E. In this way, the abdomen abutting portion 351 of the guard 350 can be slightly swung back and forth in the guard use state, but the abdomen abutting portion 351 of the guard 350 abuts with the abdomen of the child seated on the seat 311B with an appropriate force. By adjusting the length of the belt 380, the posture of the guard 350 in use can be selected. In this way, in the guard use state in which the guard 350 is in contact with the child's abdomen, the movement of the child can be regulated by the guard 350 and the belt 380, and the situation where the child falls from the child seat 300 can be prevented. .

Next, the action of the guard 350 when the child sitting on the seat 311B is lowered from the child seat will be described.
When the child is to be lowered from the child seat, the belt 380 is first loosened and a force is applied to the guard 350 in the state shown in FIG. 7 so as to move forward. As a result, a force to rotate around the shaft 354 acts on the rotating portion 353 of the guard 350 itself.

  At this time, the protrusion 355E of the rotation stop 355 that has entered the recess 367 of the receiving portion 360 hits the wall surface of the recess 367, and a force acts in the direction in which the rotation portion 353 tries to rotate. The protrusion 355E is elastically deformed and bent toward the shaft 354 side. When the rotation stopper 355 is bent and a force that further moves the guard 350 forward acts, the rotating portion 353 rotates.

  As the rotating portion 353 rotates, the protrusion 355E of the rotation stop 355 slides on the curved portion 361 of the receiving portion 360 of the sheet main body 310. Then, when the rotating portion 353 further rotates and the projection 355E of the rotation stopper 355 comes on the lock groove 365, the projection 355E is fitted into the lock groove 365 as shown in FIG.

  When the protruding portion 355E enters the lock groove 365, the posture is maintained at the position where the guard 350 moves forward. That is, when the guard 350 is moved forward and the space between the seat main body 310 and the guard 350 is expanded, the projection 355E is locked in a state of entering the lock groove 365, and is moved forward. The posture of the guard 350 is maintained at that position. In addition, what is necessary is just to perform operation | movement contrary to the above-mentioned operation | movement in order to cancel | release the locked state in which the guard 350 shown in FIG. 8 moves ahead and the attitude | position is maintained.

  In this way, the guard 350 is moved forward, the space between the seat body 310 and the guard 350 is expanded, and the state is maintained. Therefore, it is convenient for children to get on and off the child seat 300. That is, the convenience of use is improved by fixing the posture of the guard 350 in an open state.

  The child seat 300 in the shopping cart 10 according to the embodiment of the present invention has a simple structure, and the space between the seat body 310 and the guard 350 can be expanded, and the posture can be locked. In particular, in the child seat 300 in the shopping cart 10 according to the embodiment of the present invention, the mechanism for locking the rotation of the guard 350 can be realized mainly by the rotation stopper 355 and the lock groove 365 into which the guard 350 is fitted. It is simple and its manufacturing cost is very low.

  As described above, the present invention can be implemented in various forms without departing from the spirit of the present invention. For example, the structure of the shopping cart to which the guard rotation lock mechanism of the present invention is applied is not limited to the above description.

  In the above-described embodiment, the case where the guard rotation lock mechanism of the present invention is applied to a child seat provided with a reclining mechanism is exemplified, but it goes without saying that the presence or absence of the reclining mechanism does not matter. In addition, the presence or absence of a cover 312 that covers the accommodating portion 311 of the child seat 300 is also arbitrary.

  Of course, the guard rotation lock mechanism of the present invention is not applied only to the child seat mounted on the shopping cart. For example, the guard rotation lock mechanism of the present invention can be applied to a baby stroller seat and a guard rotatably attached thereto, and can also be applied to a child seat on which a child mounted on a car and sits. It is obvious that the present invention can be applied to a high chair for children used indoors.

It is a front perspective view which shows the shopping cart which concerns on embodiment of this invention. It is a back perspective view of the shopping cart of FIG. It is a front view of the shopping cart of FIG. It is a side view of the shopping cart of FIG. It is a perspective view which shows the guard of the child seat which concerns on embodiment of this invention. It is a perspective view which shows the structure of the receiving part periphery of the child seat of FIG. It is sectional drawing which shows the rotation mechanism of the guard which concerns on embodiment of this invention. It is sectional drawing which shows the rotation mechanism of the guard which concerns on embodiment of this invention. It is a perspective view which shows the conventional child seat. It is a perspective view which shows the rotation mechanism of the guard in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shopping cart 100 Cart main body 110 Base frame 111R, 111L Bar material 112 1st connection bar material 114 1st construction material 114R, 114L Standing part 114C Horizontal part 115 Metal bar part 115A Slow slope part 115B Step part 115C Horizontal part 115S Stopper 118 Buffer member 120 Seat support frame 121R, 121L First vertical bar 122R, 122L First inclined bar 123 Second connecting bar 130 Handle frame 131R, 131L Second vertical bar 132R, 132L Second inclined bar 133R, 133L Third inclined bar 134 Third connecting bar 135 Third horizontal member 138 Grip 200 Traveling wheel 300 Child seat 310 Seat body 311 Storage portion 311A Backrest portion 311B Seat portion 311C Elbow rest guard portion 312 -350 Guard 351 Abdominal contact portion 352 Crotch contact portion 353 Rotating portion 353A Through hole 353B, 367 Recessed portion 353C Hole 354 Shaft 355 Anti-rotation 355A Base portion 355B Protruding portion 355C Bending portion 355D Inclining portion 355E Protruding portion 360 Receiving portion 360 Receiving portion 360 362 Side wall 365 Lock groove 370 Head support 380 Belt 390 Lever S Housing space

Claims (11)

A seat structure in which a guard that regulates the movement of a child seated on a seat is swingably attached to a seat portion of the seat body,
The guard has a rotating part, and the rotating part is rotatably supported by a receiving part recessed in the front edge of the seat part,
The rotating part is provided with a rotation stopper having a protrusion,
The receiving portion is formed with a lock groove and a recess wider than the protrusion ,
The protrusion of the rotation stopper is fitted into the lock groove of the receiving portion, so that the swing of the guard is restricted, and the distance between the seat body and the guard can be kept constant ,
By the protruding portion is loosely fitted in the recess of the receiving portion, characterized in that the obtained so that by swinging back and forth the guard in response to movement of the protruding portions in the above recess, guard Rotation lock mechanism. A seat structure in which a guard that regulates the movement of a child seated on a seat is swingably attached to a seat portion of the seat body,
The guard includes an abdomen contact part, a crotch contact part extending downward from a lower end of the abdomen contact part, and a rotating part formed at a tip of the crotch contact part. Is rotatably supported by a receiving part recessed in the front edge of the seat part,
The rotating part is provided with a rotation stopper having a protrusion,
The receiving portion is formed with a lock groove and a recess wider than the protrusion ,
The protrusion of the rotation stopper is fitted into the lock groove of the receiving portion, so that the swing of the guard is restricted, and the distance between the seat body and the guard can be kept constant ,
By the protruding portion is loosely fitted in the recess of the receiving portion, characterized in that the obtained so that by swinging back and forth the guard in response to movement of the protruding portions in the above recess, guard Rotation lock mechanism. The rotation stopper is formed in a substantially U-shaped cross section as a whole, a base portion that contacts a recess formed in the rotation portion, and a protrusion that protrudes from the bottom surface of the base portion and fits into a hole formed in the recess. A curved portion extending in an arc from the edge of the base portion, an inclined portion extending from the edge of the curved portion and inclined with respect to the base portion, and formed at the tip of the inclined portion The projecting portion is configured to be elastically deformable, and the receiving portion has a curved portion with a semicircular cross section, and the locking groove is formed in the curved portion,
In conjunction with the swinging of the guard, the rotation stopper slides along the curved portion of the receiving portion, and the protrusion of the rotation stopping fits into the lock groove of the receiving portion, whereby the guard The guard rotation lock mechanism according to claim 1, wherein the guard rotation lock mechanism is locked at a position.   The lock groove is formed at a position near the backrest portion of the seat body in the curved portion of the receiving portion, and the distance between the guard and the seat body in a state where the protrusion is fitted in the lock groove is the The guard rotation lock mechanism according to claim 3, wherein the guard rotation lock mechanism is wider than a distance between the guard and the seat body when the contact portion is placed on the abdomen of the child.   The waist belt is inserted into the guard and the backrest portion to form a loop, and a child is placed in the loop to regulate the movement of the seated child. The guard rotation lock mechanism described in 1. A seat provided with a seat body provided with a seat part and a backrest part, and a guard for restricting the movement of a child seated on the seat part,
A seat comprising the guard rotation lock mechanism according to claim 1, wherein rotation of the guard is restricted. A shopping cart including a cart body having a plurality of traveling wheels at a lower portion and a child seat supported by the cart body,
The child seat includes a seat body having a seat portion and a backrest portion, a guard that restricts movement of a child seated on the seat portion, and a guard rotation lock mechanism that restricts rotation of the guard,
The guard has a rotating part, and the rotating part is rotatably supported by a receiving part recessed in the front edge of the seat part,
The rotating part is provided with a rotation stopper having a protrusion,
The receiving portion is formed with a lock groove and a recess wider than the protrusion ,
The protrusion of the rotation stopper is fitted into the lock groove of the receiving portion, so that the swing of the guard is restricted, and the distance between the seat body and the guard can be kept constant ,
By the protruding portion is loosely fitted in the recess of the receiving portion, characterized in that the obtained so that by swinging back and forth the guard in response to movement of the protruding portions in the above recess, shopping cart. A shopping cart including a cart body having a plurality of traveling wheels at a lower portion and a child seat supported by the cart body,
The child seat includes a seat body having a seat portion and a backrest portion, a guard that restricts movement of a child seated on the seat portion, and a guard rotation lock mechanism that restricts rotation of the guard,
The guard includes: an abdomen abutting part; a crotch abutting part extending downward from a lower end of the abdomen abutting part; and a rotating part formed at a tip of the crotch abutting part. However, it has a receiving part recessed in the front edge of the seat part, the rotating part is rotatably supported by the receiving part,
The guard includes an abdomen contact part, a crotch contact part extending downward from a lower end of the abdomen contact part, and a rotating part formed at a tip of the crotch contact part. Is rotatably supported by a receiving part recessed in the front edge of the seat part,
The rotating part is provided with a rotation stopper having a protrusion,
The receiving portion is formed with a lock groove and a recess wider than the protrusion ,
The protrusion of the rotation stopper is fitted into the lock groove of the receiving portion, so that the swing of the guard is restricted, and the distance between the seat body and the guard can be kept constant ,
By the protruding portion is loosely fitted in the recess of the receiving portion, characterized in that the obtained so that by swinging back and forth the guard in response to movement of the protruding portions in the above recess, guard Rotation lock mechanism. The rotation stopper is formed in a substantially U-shaped cross section as a whole, a base portion that contacts a recess formed in the rotation portion, and a protrusion that protrudes from the bottom surface of the base portion and fits into a hole formed in the recess. A curved portion extending in an arc from the edge of the base portion, an inclined portion extending from the edge of the curved portion and inclined with respect to the base portion, and formed at the tip of the inclined portion The projecting portion is configured to be elastically deformable, and the receiving portion has a curved portion with a semicircular cross section, and the locking groove is formed in the curved portion,
In conjunction with the swinging of the guard, the rotation stopper slides along the curved portion of the receiving portion, and the protrusion of the rotation stopping fits into the lock groove of the receiving portion, whereby the guard 9. Shopping cart according to claim 7 or 8, characterized in that it is locked in position.   The lock groove is formed at a position near the backrest portion of the seat body in the curved portion of the receiving portion, and the distance between the guard and the seat body in a state where the protrusion is fitted in the lock groove is the The shopping cart according to claim 9, wherein the shopping cart is wider than the distance between the guard and the seat body when the contact portion is placed on the abdomen of the child. The waist belt is inserted into the guard and the backrest part to form a loop, and a child is placed in the loop to regulate the movement of the seated child. The shopping cart described in.

Images