Patent Description:
In the field of automobile maintenance and repair as well as manufacturing, a plurality of positions in the same coordinate direction need to be calibrated during calibration of a device. For example, during the mounting and maintenance and repair of automobile radar, if the mounting position and angle of the radar have large deviations, the radar may fail to sense, causing safety hazards. Therefore, the automobile radar needs to be calibrated after being mounted.

At present, a bracket apparatus is usually used to carry a radar calibration apparatus. The bracket apparatus includes a vertical rod and a slider. The slider is mounted to the vertical rod, and the slider carries the radar calibration apparatus. However, when the slider slides on the vertical rod, no self-locking function is provided. This is likely to cause the slider to slide in a free fall and smash.

Conventional devices are known from <CIT>, which discloses a bracket apparatus with the features of the preamble of claim <NUM>.

In order to solve the above technical problem, embodiments of the disclosure provide a bracket apparatus with a locking function to solve the technical problem that a slider of the bracket apparatus is easy to fall freely in the prior art.

The embodiments of the disclosure adopt the following technical solution to resolve the technical problem.

A bracket apparatus is provided, including:.

Optionally, the sliding member includes a rod clamp and a housing;.

Optionally, an axis of rotation of the handle is perpendicular to a direction of movement of the rod body.

Optionally, the rod clamp includes a first clamping plate, a second clamping plate, a third clamping plate and a fourth clamping plate;.

Optionally, a first friction plate is provided on the fourth clamping plate; and
the fourth clamping plate abuts against the vertical rod through the first friction plate.

Optionally, the second clamping plate and/or the third clamping plate abut(s) against the vertical rod.

Optionally, the housing includes two first side plates; and
the handle and the rod body are both disposed between the two first side plates, and the handle is rotatably connected to the two first side plates.

Optionally, the handle includes a handle body and a link;.

Optionally, an inclined face is provided on the handle, and an abutting post is provided on the rod body, the abutting post abutting against the inclined face; and
the handle pushes the abutting post during rotation, so that the abutting post moves along the inclined face to drive the push rod assembly to move.

Optionally, a movable hole is provided on the housing; and
one end of the rod body facing away from the backing plate is received in the movable hole, and the rod body is movable along the movable hole.

Optionally, the bracket apparatus includes a holder mounted to the housing; and
the holder is configured to carry the calibration element.

Optionally, the holder includes a base plate, an arc-shaped portion and a fixed plate;.

Optionally, the holder includes an adjustment rod;.

Optionally, the direction of movement of the rod body is perpendicular to the length direction of the vertical rod.

Optionally, a second friction plate is provided on a side of the backing plate facing the vertical rod; and
the backing plate abuts against the vertical rod through the second friction plate.

In comparison to the prior art, in the bracket apparatus of the disclosure, the elastic member of the clamping assembly can drive the push rod assembly to tightly press against the vertical rod, so that the sliding member is fixed to the vertical rod to prevent the sliding member from free falling and smashing. In addition, the handle can drive the push rod assembly to be removed from contact with the vertical rod, so that the sliding member is slidable freely along the vertical rod. Therefore, the height of the calibration apparatus hung on the sliding member can be adjusted as needed, to meet different height requirements and calibration requirements.

One or more embodiments are described by way of example with reference to the corresponding figures in the accompanying drawings. The exemplary descriptions are not to be construed as limiting the embodiments. Elements in the accompanying drawings that have same reference numerals are represented as similar elements. Unless otherwise particularly stated, the figures in the accompanying drawings are not drawn to scale.

For ease of understanding the disclosure, the disclosure is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, when a component is expressed as "being fixed to" another component, the component may be directly on the another component, or one or more intermediate components may exist between the component and the another component. When one component is expressed as "being connected to" another component, the component may be directly connected to the another component, or one or more intermediate components may exist between the component and the another component. The terms "vertical", "horizontal", "left", "right", "inner", "outside", and similar expressions used in this specification are merely used for an illustrative purpose.

Unless otherwise defined, meanings of all of the technical and scientific terms used in this specification are the same as those usually understood by those skilled in the art of the disclosure. The terms used in the specification of the disclosure are merely intended to describe objectives of the specific embodiment, and are not intended to limit the disclosure. The term "and/or" used in this specification includes any or all combinations of one or more related listed items.

In addition, technical features involved in different embodiments of the disclosure described below may be combined together if there is no conflict.

Referring to <FIG>, a bracket apparatus <NUM> provided in an embodiment of the disclosure includes a base <NUM>, a vertical rod <NUM> and a carrying assembly. The carrying assembly includes a clamping assembly <NUM> and a holder <NUM>. The vertical rod <NUM> is vertically disposed. One end of the vertical rod is fixedly mounted to the base <NUM>. One end of the clamping assembly <NUM> is movably mounted to the vertical rod <NUM>. The clamping assembly <NUM> is slidable along the vertical rod <NUM>. An other end of the clamping assembly <NUM> is connected to the holder <NUM>. The holder <NUM> is configured to carry a required calibration apparatus.

The base <NUM> includes a pedestal <NUM>, a beam <NUM>, a support rod <NUM> and a horizontal adjustment member <NUM>. The pedestal <NUM> and the support rod <NUM> are respectively mounted to the beam <NUM>. The horizontal adjustment member <NUM> is mounted to the pedestal <NUM> and the support rod <NUM>.

The pedestal <NUM> is flat. One end of the pedestal <NUM> is mounted to the middle of the beam <NUM>. An other end of the pedestal <NUM> protrudes from the beam <NUM>. One end of the vertical rod <NUM> is fixedly mounted to the pedestal <NUM>.

Two scales <NUM> are provided on a surface of the beam <NUM> facing the vertical rod <NUM>. The two scales <NUM> are disposed on two opposite sides of the pedestal <NUM>. The two scales <NUM> are in a mutually symmetrical arrangement relative to the vertical rod <NUM>.

A quantity of the support rods <NUM> is two. The two support rods <NUM> are respectively disposed at two opposite ends of the beam <NUM>. The two support rods <NUM> are parallel to each other and both are perpendicular to the beam <NUM>. A pulley <NUM> is provided at one end of each of the two support rods <NUM>. The pulley <NUM> is configured to drive the bracket apparatus <NUM> to move.

The quantity of the horizontal adjustment members <NUM> is three. Two of the horizontal adjustment members <NUM> are respectively provided at one ends of the two support rods <NUM> away from the pulley <NUM>. The other one of the horizontal adjustment members <NUM> is disposed at one end of the pedestal <NUM> protruding from the beam <NUM>. The two horizontal adjustment members <NUM> disposed on the support rod are both located on the same side of the beam <NUM>. The other one of the horizontal adjustment members disposed on the pedestal <NUM> is located on an other side of the beam <NUM>. The three horizontal adjustment members <NUM> are distributed in an isosceles triangle. The horizontal adjustment member <NUM> includes a handle <NUM> and an adjustment rod <NUM>. The handle <NUM> is fixed to one end of the adjustment rod <NUM>. An other end of the adjustment rod <NUM> passes through the pedestal <NUM> or the support rod <NUM> and abuts against the ground. The adjustment rod <NUM> is threadedly connected to the pedestal <NUM> or the support rod <NUM>. An axial direction of the adjustment rod <NUM> is the same as a length direction of the vertical rod <NUM>. Rotating the handle <NUM> can cause the adjustment rod <NUM> to move relative to the pedestal <NUM> in the axial direction to adjust a pitch angle of the pedestal <NUM>.

It may be understood that, in some other embodiments, the quantity of the horizontal adjustment members <NUM> can be set to four according to actual needs, for example. The two horizontal adjustment members <NUM> are disposed on the pedestal <NUM>. The other two horizontal adjustment members <NUM> are respectively disposed on the two support rods <NUM>, as long as the pitch angle of the pedestal <NUM> can be adjusted.

Referring to <FIG> and <FIG> together, the clamping assembly <NUM> includes a sliding member <NUM>, a handle <NUM>, a push rod assembly <NUM> and an elastic member <NUM>. One end of the sliding member <NUM> is sleeved on the vertical rod. An other end of the sliding member <NUM> is configured to carry the required calibration apparatus. The push rod assembly <NUM> is movably mounted to the sliding member <NUM>. The push rod assembly <NUM> is movable relative to the sliding member <NUM> in a preset direction. The preset direction is at a preset angle to the length direction of the vertical rod <NUM>. One end of the handle <NUM> is rotatably connected to the sliding member <NUM>. The handle <NUM> is rotatable relative to the sliding member <NUM>. An other end of the handle <NUM> is movably connected to the push rod assembly <NUM>. The handle <NUM> can drive the push rod assembly <NUM> to move relative to the sliding member <NUM>. A value of the preset angle is between <NUM> and <NUM> degrees. Preferably, the value of the preset angle is <NUM> degrees.

Referring to <FIG>, the sliding member <NUM> includes a rod clamp <NUM> and a housing <NUM>. The rod clamp <NUM> is sleeved on the vertical rod <NUM>. One end of the housing <NUM> is connected to the rod clamp <NUM>. An other end of the housing <NUM> is configured to carry the calibration element.

The rod clamp <NUM> includes a first clamping plate <NUM>, a second clamping plate <NUM>, a third clamping plate <NUM> and a fourth clamping plate <NUM>. One end of the second clamping plate <NUM> and one end of the third clamping plate <NUM> are respectively connected to two opposite sides of the first clamping plate <NUM>. An other end of the second clamping plate <NUM> and an other end of the third clamping plate <NUM> are respectively connected to two opposite sides of the fourth clamping plate <NUM>. The first clamping plate <NUM>, the second clamping plate <NUM>, the third clamping plate <NUM> and the fourth clamping plate <NUM> jointly form a sliding groove. The vertical rod <NUM> passes through the sliding groove. The sliding member <NUM> is movable relative to the vertical rod in the length direction of the vertical rod <NUM>. A gap <NUM> is provided between an inner wall of the first clamping plate <NUM> and the vertical rod <NUM>. An inner wall of the second clamping plate <NUM>. An inner wall of the third clamping plate <NUM> and an inner wall of the fourth clamping plate <NUM> all abut against the vertical rod <NUM>.

It may be understood that neither the second clamping plate <NUM> nor the third clamping plate <NUM> abuts against the vertical rod <NUM>; or one of the second clamping plate <NUM> and the third clamping plate <NUM> abuts against the vertical rod <NUM>, and it is only necessary to cause the fourth clamping plate <NUM> to abut against the vertical rod <NUM>.

A first friction plate <NUM> is provided on the inner wall of the fourth clamping plate <NUM>. The first friction plate <NUM> abuts against the vertical rod <NUM>. The first friction plate <NUM> is configured to increase friction between the first clamping plate <NUM> and the vertical rod <NUM>. The vertical rod <NUM> is connected to the sliding member <NUM> more stably.

A through hole <NUM> is provided on the first clamping plate <NUM>. The through hole <NUM> extends from the inner wall of the first clamping plate <NUM> in a direction away from the fourth clamping plate <NUM>. The through hole <NUM> runs through an outer wall of the first clamping plate <NUM>. The through hole <NUM> is in communication with the gap <NUM>. An axial direction of the through hole <NUM> is the same as the preset direction. The axial direction of the through hole <NUM> is at the preset angle to the length direction of the vertical rod <NUM>. Preferably, the axial direction of the through hole <NUM> is perpendicular to the length direction of the vertical rod <NUM>.

The housing <NUM> includes a panel <NUM>, a first side plate <NUM> and a connecting portion <NUM>. A quantity of the first side plates <NUM> is two. The two first side plates <NUM> are respectively disposed on two opposite sides of the panel <NUM>. One end of the panel <NUM> and one end of each of the two first side plates <NUM> are all connected to one end of the connecting portion <NUM>. An other end of the panel <NUM> and an other end of the two first side plate <NUM> are both connected to the first clamping plate <NUM>. The panel <NUM>, the two first side plates <NUM> and the connecting portion <NUM> jointly form a receiving groove. The receiving groove is in communication with the through hole <NUM>. The handle <NUM> and the push rod assembly <NUM> are both received in the receiving groove. A first connecting hole <NUM> is provided on each of the two first side plates <NUM>. Axes of the two first connecting holes <NUM> coincide with each other. The axes of the two first connecting holes <NUM> are both perpendicular to an axis of the through hole <NUM>.

A movable hole <NUM> is provided on the connecting portion <NUM>. An axis of the movable hole <NUM> coincides with the axis of the through hole <NUM>. The movable hole <NUM> is in communication with the receiving groove. An arc-shaped groove <NUM> is further provided on the connecting portion <NUM>. The arc-shaped groove <NUM> is disposed on one side of the connecting portion <NUM> that faces away from the base <NUM>. Scales are further provided on the housing <NUM>. The scales surround the arc-shaped groove <NUM>. An adjustment hole <NUM> is further provided at one end of the connecting portion <NUM> away from the sliding member <NUM>. The adjustment hole <NUM> is in communication with the movable hole <NUM>. An axis of the adjustment hole <NUM> and the axis of the movable hole <NUM> are perpendicular to each other.

Referring to <FIG>, the handle <NUM> includes a handle body. The handle body includes a bottom plate <NUM> and a second side plate <NUM>. A quantity of the second side plates <NUM> is two. The two second side plates <NUM> are respectively disposed on two opposite sides of the bottom plate <NUM>. The bottom plate <NUM> and the two second side plates <NUM> jointly form an accommodation groove.

A first hinge hole <NUM> is provided on each of the two second side plates <NUM>. The first hinge hole <NUM> is disposed at one end of the second side plate <NUM> that faces the sliding member <NUM>. The first hinge hole <NUM> is disposed on one side of the second side plate <NUM> away from the bottom plate <NUM>. Axes of the two first hinge holes <NUM> coincide with the axes of the two first connecting holes <NUM>. The two second side plates <NUM> are both disposed between the two first side plates <NUM>. The two second side plates <NUM> are respectively connected to the two first side plates <NUM> through a first hinge shaft <NUM>. The first hinge shaft <NUM> respectively passes through the two first connecting holes <NUM> and the two first hinge holes <NUM>. Two ends of the first hinge shaft <NUM> are respectively fixed to the two first side plates <NUM>. The first hinge shaft <NUM> is respectively pivotally connected to the two second side plates <NUM>. The bottom plate <NUM> and a side plate <NUM> are both rotatable about the first hinge shaft <NUM> relative to the housing <NUM>. A second connecting hole <NUM> is provided on each of the two second side plates <NUM>. Axes of the two second connecting holes <NUM> coincide with each other. The axes of the second connecting holes <NUM> are perpendicular to the axes of the first hinge holes <NUM>.

The handle <NUM> further includes a link <NUM>. The link <NUM> is disposed in the accommodating groove. The link <NUM> includes a base portion <NUM> and an extending portion <NUM>. The extending portion <NUM> is disposed at one end of the base portion <NUM>. The extending portion <NUM> extends from the base portion <NUM> in a direction away from the bottom plate <NUM>. A quantity of the extending portions <NUM> is two. The two extending portions <NUM> are respectively disposed on two opposite sides of the base portion <NUM>. A second hinge hole <NUM> is provided at an other end of the base portion <NUM>. An axis of the second hinge hole <NUM> coincides with the axes of the second connecting holes <NUM>. The base portion <NUM> is disposed between the two second side plates <NUM>. The base portion <NUM> is respectively connected to the two second side plates <NUM> through the second hinge shaft <NUM>. The second hinge shaft <NUM> respectively passes through the second connecting holes <NUM> and the second hinge hole <NUM>. Two ends of the second hinge shaft <NUM> are respectively fixed to the two second side plates <NUM>. The second hinge shaft <NUM> is pivotally connected to the base portion <NUM>. The link <NUM> is rotatable about the second hinge shaft <NUM> relative to the two side plates <NUM>. A third connecting hole <NUM> is provided on each of the two extending portions <NUM>. Axes of the two third connecting holes <NUM> coincide with each other. The axes of the two third connecting holes <NUM> are both parallel to the axis of the second hinge hole <NUM>.

Referring to <FIG>, the push rod assembly <NUM> includes a rod body <NUM> and a backing plate <NUM>. The backing plate <NUM> is connected to one end of the rod body <NUM>. A length direction of the backing plate <NUM> is perpendicular to an axial direction of the rod body <NUM>. The backing plate <NUM> is disposed in the gap <NUM>. One end of the rod body <NUM> away from the backing plate <NUM> passes through the through hole <NUM> and is received in the receiving groove.

A third hinge hole <NUM> is provided at one end of the rod body <NUM> away from the backing plate <NUM>. An axis of the third hinge hole <NUM> coincides with the axes of the third connecting holes <NUM>. The rod body <NUM> is disposed between the two extending portions <NUM>. The rod body <NUM> is respectively connected to the two extending portions <NUM> through a third hinge shaft <NUM>. The third hinge shaft <NUM> respectively passes through the third connecting holes <NUM> and the third hinge hole <NUM>. Two ends of the third hinge hole <NUM> are respectively fixed to the two extending portions <NUM>. The third hinge shaft <NUM> is pivotally connected to the rod body <NUM>. The push rod assembly <NUM> is rotatable about the third hinge shaft <NUM> relative to the link <NUM>. The rod body <NUM> is movable relative to the sliding member <NUM> in the preset direction. The preset direction is the same as the axial direction of the rod body <NUM>. An angle of an included angle between the axial direction of the rod body <NUM> and the length direction of the vertical rod <NUM> is the same as the preset angle.

A second friction plate <NUM> is provided on the backing plate <NUM>. The second friction plate <NUM> is disposed on one side of the backing plate <NUM> that faces the vertical rod <NUM>. The second friction plate <NUM> abutting against the vertical rod <NUM> can increase friction between the clamping assembly <NUM> and the vertical rod <NUM>. The vertical rod <NUM> is connected to the clamping assembly <NUM> more stably.

A quantity of the elastic members <NUM> is four. The four elastic members <NUM> are all disposed in the gap <NUM>. One end of the elastic member <NUM> abuts against one side of the backing plate <NUM> that faces the rod body <NUM>. An other end of the elastic member <NUM> abuts against the inner wall of the first clamping plate <NUM>. A spring force of the elastic member <NUM> drives the backing plate <NUM> to abut against the vertical rod <NUM>. The vertical rod <NUM> abuts against the first friction plate <NUM>. The clamping assembly <NUM> is fixed relative to the vertical rod <NUM>. It may be understood that the elastic member <NUM> may be selected according to actual needs, such as a spring, a leaf spring or the like, as long as the spring force of the elastic member <NUM> can drive the backing plate <NUM> to abut against the vertical rod <NUM>. It may be understood that, a quantity of the elastic members <NUM> may be set according to an actual requirement. For example, the quantity may be set to three, five and the like, as long as the quantity is at least one.

Referring to <FIG>, when the main handle member is held upward, the bottom plate <NUM> and the second side plates <NUM> all rotate about the first hinge shaft <NUM> in the direction of the housing <NUM>. The second side plate <NUM> drives the link <NUM>. The link <NUM> pushes the rod body <NUM> to move in a direction away from the vertical rod <NUM>. The rod body <NUM> pulls the backing plate <NUM> to move in a direction away from the vertical rod <NUM>. The backing plate <NUM> compresses the elastic member <NUM> until the backing plate <NUM> no longer abuts against the vertical rod <NUM>. The clamping assembly <NUM> is movable in the length direction of the vertical rod <NUM>. When the main handle member is released, under the action of the spring force of the elastic member <NUM>, the backing plate <NUM> is driven to move toward the vertical rod <NUM> until the backing plate <NUM> abuts against the vertical rod <NUM>. Both the rod body <NUM> and the handle <NUM> are reset. The clamping assembly <NUM> and the vertical rod <NUM> are locked.

Referring to <FIG> together, the holder <NUM> includes a base plate <NUM>, an arc-shaped portion <NUM>, a fixed plate <NUM> and an adjustment rod <NUM>. The arc-shaped portion <NUM> is disposed at one end of the base plate <NUM>. The fixed plate <NUM> is connected to an other end of the base plate <NUM>. The adjustment rod <NUM> is connected to the base plate <NUM> and the clamping assembly <NUM>. The arc-shaped portion <NUM> extends from the base plate <NUM> toward the base <NUM>. A shape of the arc-shaped portion <NUM> is mated with the arc-shaped groove <NUM>. The arc-shaped portion <NUM> is limited in the arc-shaped groove <NUM>. The arc-shaped portion <NUM> is movable in the arc-shaped groove <NUM>. One side of the fixed plate <NUM> is connected to the base plate <NUM>. An other side of the fixed plate <NUM> is configured to be connected to the required calibration apparatus.

An adjustment groove <NUM> is provided on the base plate <NUM>. The adjustment groove <NUM> is arc-shaped. The adjustment groove <NUM> runs through two surfaces of the base plate <NUM>. An extending direction of the adjustment groove <NUM> is the same as an extending direction of the arc-shaped portion <NUM>. A center of the adjustment groove <NUM> coincides with a center of the arc-shaped portion <NUM>. The adjustment groove <NUM> is in communication with the adjustment hole <NUM>.

One end of the adjustment rod <NUM> passes through the adjustment groove <NUM> and is disposed in the adjustment hole <NUM>. The base plate <NUM> is connected to the clamping assembly <NUM>. Preferably, the adjustment rod <NUM> and the adjustment hole <NUM> are threadedly connected. After the adjustment rod <NUM> is tightened, the holder <NUM> is fixed relative to the clamping assembly <NUM>. When the adjustment rod <NUM> is loosened, the arc-shaped portion <NUM> can move in the arc-shaped groove <NUM>. The adjustment groove <NUM> is movable relative to the adjustment rod <NUM>. The required calibration apparatus hung on the fixed plate <NUM> can adjust the angle in the horizontal direction, and can obtain, by using the scales, angle values adjusted by the required calibration apparatus.

Referring to <FIG>, a bracket apparatus <NUM> provided in another embodiment of the disclosure is basically the same as the bracket apparatus <NUM> shown in <FIG>. A difference is that a handle 32a of the clamping assembly <NUM> and a push rod assembly 33a are different.

The handle 32a includes a bottom plate 320a and two second side plates 322a. The two second side plates 322a are respectively disposed on two opposite sides of the bottom plate 320a. A first hinge hole 3220a is provided on one end of each of the two second side plates 322a. The first hinge hole 3220a has the same structure as the first hinge hole <NUM> of the bracket apparatus <NUM>. For the connecting structure of the handle 32a and the housing <NUM>, details will not be described herein again. An inclined face 3224a is provided on an other end of each of the two second side plates 322a. Included angles between the two inclined faces 3224a and the length direction of the bottom plate 320a are both acute angles.

The push rod assembly 33a includes a rod body 330a and a backing plate 332a. The backing plate 332a is connected to one end of the rod body 330a. The backing plate 332a has the same structure as the backing plate <NUM> of the bracket apparatus <NUM>. The details will not be described herein again. An abutting post 3302a is provided on the rod body 330a. An axis of the abutting post 3302a is parallel to an axis of the first hinge hole 3220a. The rod body 330a is disposed between the two second side plates 322a. Two ends of the abutting post 3302a respectively abut against the two inclined faces 3224a.

Referring to <FIG> together, when the handle 32a is held upward, the bottom plate 320a and the second side plates 322a all rotate about the first hinge shaft <NUM> toward the housing <NUM>. The abutting post 3302a is driven to move along the inclined face 3224a and in a direction away from the vertical rod <NUM>. The rod body 330a moves in a direction away from the vertical rod <NUM>. The backing plate 332a compresses the elastic member <NUM> until the backing plate 332a no longer abuts against the vertical rod <NUM>. The clamping assembly <NUM> is movable in the length direction of the vertical rod <NUM>. When the handle 32a is released, under the action of the spring force of the elastic member <NUM>, the backing plate 332a is driven to move toward the vertical rod <NUM>. Both the rod body 330a and the handle 32a are reset. The clamping assembly <NUM> and the vertical rod <NUM> are locked.

Claim 1:
A bracket apparatus (<NUM>), comprising:
a base (<NUM>);
a vertical rod (<NUM>), one end of the vertical rod (<NUM>) being mounted to the base (<NUM>);
a clamping assembly (<NUM>), comprising a sliding member (<NUM>), a push rod assembly (<NUM>), a handle (<NUM>) and an elastic member (<NUM>), wherein
the sliding member (<NUM>) is sleeved on the vertical rod (<NUM>) and is configured to carry a calibration element;
the bracket apparatus (<NUM>) being characterised in that:
the push rod assembly (<NUM>) comprises a rod body (<NUM>) and a backing plate (<NUM>), one side of the backing plate (<NUM>) being in contact with the vertical rod (<NUM>), and an other side of the backing plate (<NUM>) being connected to the rod body (<NUM>);
the elastic member (<NUM>) is disposed between an inner wall of the sliding member (<NUM>) and the backing plate (<NUM>) and is configured to provide an elastic restoring force, so that the backing plate (<NUM>) tightly abuts against the vertical rod (<NUM>);
the handle (<NUM>) is configured to drive the rod body (<NUM>) to move away from the vertical rod (<NUM>); and
when the handle (<NUM>) drives the rod body (<NUM>) to move away from the vertical rod (<NUM>), the backing plate (<NUM>) is removed from contact with the vertical rod (<NUM>), so that the sliding member (<NUM>) is movable in a length direction of the vertical rod (<NUM>).