JPS6439720U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1A is a side view of an embodiment of the present invention in use, Fig. 1B is a rear view of the embodiment shown in Fig. 1A, Fig. 2A is a side view of the embodiment shown in Fig. 1A, and Fig. 2B is a side view of the embodiment shown in Fig. 1A.
The figure is a rear view of the folded state, Figure 3 is a partially enlarged side view to explain the connecting rod, Figure 4 is an enlarged side view to explain the lock mechanism, and Figure 5 is shown in Figure 4. FIG. 6 is a longitudinal sectional view of the lock mechanism, and is a partial view for explaining the details of the connection relationship of the link mechanism, and is a diagram showing the state seen from below. In the figure, 1 is the left frame, 2 is the right frame, 3, 103 is the front frame member, 4, 10
4 is a rear frame member, 7 is a connecting rod, 11, 11
1 is a handle, 17 is a lock member, 17a is a notch, 20 is a spring member as a biasing means, 22 is a lock pin, 26, 126 is a rod as a connecting bar lifting means, 27, 127 is a connecting bar, 3
1 is a left upper link member, 32 is a left lower link member, 131 is a right upper link member, and 132 is a right lower link member.

Claims (1)

[Claims for Utility Model Registration] (1) A left frame and a right frame arranged at a predetermined distance apart, a handle rotatably attached to the upper part of the left frame and the right frame, and the left frame and the right frame. In the wheelchair, the left frame and the right frame each have a front frame member and a connecting structure that connects the left frame and the right frame so that the distance between the left frame and the right frame changes between a used state and a folded state. , a pair of connecting rods whose front end sides are fixed to the front frame so as to extend rearward at different height positions from the front frame member, and a rear frame member fixed to the rear end side of the connecting rods, The structure includes: a pair of connecting bars whose outer ends are rotatably attached to each rear frame member of the left frame and the right frame, and which are rotatably connected to each other at a connection point on the inner end; and the connecting bars. The lower end side is attached to the inner side of the attachment point to the frame member on the outer end side of the handle, and the upper end side is attached to a handle position that is raised as the handle rotates when transitioning from the use state to the folded state. and by rotating the handle, the attachment point to the connection bar is raised, and the connection bar is rotated upward about the attachment point to each rear frame member, thereby bringing the left and right frames closer together. a left-hand upper link member, a left-hand lower link member, a right-hand upper link member, and a right-hand lower link rotatably attached around each of the connecting rods fixed to the left and right frames; a link mechanism having a member, the left upper link member of the link mechanism is rotatably connected to the right lower link member at a distal end, and the right upper link member is rotatable to the left lower link member at a distal end. , and the left and right upper link members are rotatably connected to each other at positions near the center. (2) The wheelchair according to claim 1, which is a registered utility model, further comprising a locking mechanism for locking the orientation of the handle to the orientation in use. (3) The lock mechanism includes a lock member attached to the handle side so as to be movable up and down, biasing means for biasing the lock member downward, and a lock pin fixed in position for the rear frame member. death,
2. The wheelchair according to claim 2, wherein the locking member is formed with a downwardly open engagement notch into which a locking pin is engaged.