wheelchair electric head support device

Abstract

This invention provides a support device for the electric motorized headrest of a wheelchair, including an upper sleeve, a lower sleeve, a fixed sleeve, a first compression spring, and an operating handle. The upper sleeve is fitted with the fixed sleeve, which is mounted on the electric motorized headrest. The upper sleeve has a closed end at its top and an axially formed guide groove. The fixed sleeve has a radially positioned limiting member that passes through the guide groove and extends into the upper sleeve. The first compression spring is located inside the upper sleeve. The lower sleeve has an auxiliary wheel at its bottom, which is connected to the upper sleeve via a rotating mechanism. A radially protruding limiting block is provided on the upper sleeve. The operating handle is pivotally mounted on the fixed sleeve and has a limiting groove. When the limiting block is inserted into the limiting groove, the upper sleeve is held in a first position; or when the limiting block is removed from the limiting groove, the restoring force of the first compression spring pushes the closed end of the upper sleeve away from the limiting member, holding the upper sleeve in a second position. This invention saves storage space on the electric motorized headrest and improves safety during use.

Claims

1. A wheelchair electric vehicle head support device, wherein: It includes an upper sleeve, a lower sleeve, a fixed sleeve, a first compression spring, and an operating handle; the fixed sleeve is fitted around the outer periphery of the upper sleeve and is mounted on the electric vehicle head; the upper sleeve has a closed end at the top and a guide groove is axially opened on the upper sleeve; the fixed sleeve has a limiting member radially, which passes through the guide groove and extends into the interior of the upper sleeve; the first compression spring is located inside the upper sleeve and between the limiting member and the closed end at the top of the upper sleeve; the lower sleeve has an auxiliary wheel at the bottom and is connected to the upper sleeve through a rotating mechanism to adjust the position of the lower sleeve and the auxiliary wheel. A limiting block is radially protruding from the outer circumference of the upper sleeve. The operating handle is rotatably mounted on the fixed sleeve. The operating handle is provided with a limiting groove that matches the limiting block. When the limiting block is inserted into the limiting groove, the upper sleeve is kept in the first position. The first compression spring is compressed by the limiting member cooperating with the closed end of the top of the upper sleeve. Alternatively, when the limiting block is removed from the limiting groove, the restoring force of the first compression spring pushes the closed end of the top of the upper sleeve away from the limiting member, so that the upper sleeve is kept in the second position.

2. A wheelchair electric vehicle headrest support device as described in claim 1, wherein: It also includes a second compression spring. The middle part of the operating handle is pivotally connected to the fixed sleeve. A limiting groove is provided on the upper part of the operating handle. A positioning post is provided on the lower part of the operating handle. A positioning groove is provided on the fixed sleeve. One end of the second compression spring is sleeved on the positioning post, and the other end is embedded in the positioning groove.

3. A wheelchair electric vehicle headrest support device as described in claim 2, wherein: The upper part of the operating handle is equipped with an anti-slip cap.

4. A wheelchair electric vehicle headrest support device as described in claim 1, wherein: The limiting component is a first limiting bolt. The fixed sleeve has a threaded through hole in the radial direction. The first limiting bolt is screwed onto the fixed sleeve through the threaded through hole, and the bolt of the first limiting bolt passes through the guide groove and extends into the interior of the upper sleeve.

5. A wheelchair electric vehicle headrest support device as described in claim 1, wherein: It also includes an operating handle and a second limiting bolt. The upper sleeve has a first through hole on the side wall at the top, and the operating handle has a first threaded blind hole. The second limiting bolt passes through the first through hole and cooperates with the first threaded blind hole to fix the operating handle to the top of the upper sleeve to form the closed end. The head of the second limiting bolt forms the limiting block.

6. A wheelchair electric vehicle headrest support device as described in claim 1, wherein: The rotating mechanism includes a connecting column, which is fixedly installed at the bottom of the upper sleeve, and the top of the lower sleeve is installed on the connecting column in a manner that allows it to rotate around the axis of the connecting column.

7. A wheelchair electric vehicle headrest support device as described in claim 6, wherein: It also includes a third limiting bolt and a third compression spring. The third limiting bolt is radially screwed onto the connecting column. The top of the lower sleeve has multiple slots that match the third limiting bolt. The interior of the lower sleeve has a first flange that is radially protruding near the slots. The bottom outer periphery of the connecting column has a second flange that is radially protruding. The third compression spring is sleeved on the outer periphery of the connecting column, and the two ends of the third compression spring abut against the first flange and the second flange, respectively.

8. A wheelchair electric vehicle headrest support device as described in claim 7, wherein: The bayonet is U-shaped, and there are two bayonets.

9. A wheelchair electric vehicle headrest support device as described in claim 6, wherein: It also includes a limiting post and a first fixing bolt. The lower sleeve has a second through hole on the side wall at the top. The limiting post is located inside the lower sleeve and below the connecting post. The limiting post has a second threaded blind hole. The first fixing bolt passes through the second through hole and cooperates with the second threaded blind hole to fix the limiting post inside the lower sleeve.

10. A wheelchair electric vehicle headrest support device as described in claim 6, wherein: It also includes a second fixing bolt. The upper sleeve has a third through hole on the side wall at the bottom, and the connecting column has a third threaded blind hole. The second fixing bolt passes through the third through hole and cooperates with the third threaded blind hole to fix the connecting column to the bottom of the upper sleeve.

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