Door jacking device

Abstract

The utility model belongs to the technical field of door protection equipment, and provides a door jacking device which comprises a telescopic arm, and when the telescopic arm is located at a working position, the telescopic arm is arranged on the telescopic arm, and when the telescopic arm is located at the working position, the telescopic arm is arranged on the telescopic arm. And the resisting area is used for resisting the door lock handle to prevent the door lock handle from rotating, so that the technical problem is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of door protection equipment and relates to a door-lifting device for preventing a door from being opened. The door-lifting device of the utility model acts on a door lock handle. Background Art

[0002] A door opener is a device that prevents a door from being opened. Figure 1 The film shows a door-lifting device currently used in the market, which usually acts on the bottom of the door. One end of the door-lifting device is inserted into the door gap at the bottom of the door, and the other end is against the ground. The main body of the door-lifting device is against the door panel at the bottom of the door. When an external force pushes the door, the door-lifting device can transmit the external force to the ground, so that the door is opened. However, since the external force pushing the door does not act on the bottom of the door, but on the upper and middle part of the door, the door is easily deformed in the process of this type of door-lifting device transmitting the external force to the ground, causing certain damage to the door.

[0003] In summary, there is a need in the market for a door lifter that can prevent a door from being opened and does not damage the door when the door lifter is in effect. Utility Model Content

[0004] In view of the problems existing in the existing door-lifting devices, namely, the door-lifting mode of the door-lifting devices makes it easy for the door to be deformed and damaged during use, the utility model provides a door-lifting device, which acts on a door lock handle and comprises a telescopic arm and a mounting position connected to the door. The telescopic arm is telescopic as a whole relative to the mounting position, so that the telescopic arm moves between a working position close to the door lock handle and a non-working position close to the mounting position, and prevents the telescopic arm from additionally increasing the occupied area of ​​the door-lifting device on the door when moving between the working position and the non-working position. The telescopic arm is provided with a resisting area for resisting the door lock handle to prevent the door lock handle from rotating when the telescopic arm is in the working position.

[0005] The door lifter described in the utility model is different from the door lifter described in the background technology part. The door lifter can be applied to any door, including doors without door locks. Although the door lifter described in the utility model acts on the door lock handle, in fact, as long as it is a door, it is usually equipped with a door lock. Therefore, the application scope of the door lifter described in the utility model is not significantly reduced compared with the above-mentioned door lifter.

[0006] The door lock handle will rotate accordingly during the process of opening the door lock. The door pusher provided by the utility model can prevent the door lock handle from rotating, thereby preventing the door lock from opening and preventing the door from being deformed and damaged during the process of pushing the door with external force.

[0007] Specifically, the door lifter uses the resisting area in the telescopic arm to resist the door lock handle to prevent the door lock handle from rotating, and the telescopic arm as a whole is extended and retracted relative to the installation position. During the extension and retraction process of the telescopic arm, the occupied area of ​​the door lifter on the door is not increased. For door lifters of other schemes, in addition to the installation position, the structure for preventing the door lock handle needs to occupy an additional area on the door when not in use. In addition, the telescopic arm as a whole is extended and retracted relative to the installation position, which greatly reduces the operation steps of the door lifter. For a structure with at least two asynchronous door lock handles, the asynchronous parts of the structure need to be operated in sequence to completely prevent the door lock handle from rotating. When it is not necessary to prevent the door lock handle from rotating, the asynchronous parts of the structure need to be operated in sequence again.

[0008] On the basis of the above door lifter, the utility model also provides the following improved technical solutions:

[0009] The door lifter also includes a sliding mechanism connecting the mounting position and the telescopic arm, the sliding mechanism includes a piston, a sliding cavity for sliding the piston, and a spring connecting the piston and the sliding cavity, the sliding cavity is provided with a blocking position for blocking the piston from sliding relative to the sliding cavity in the direction of the spring elastic force, a clamping position for clamping the piston is provided between the sliding cavity and the piston, the clamping position includes a clamping groove and a clamping pin inserted into the clamping groove, when the telescopic arm is extended and retracted between the working position and the non-working position, the piston moves between the clamping position and the blocking position, and the piston is a block structure or a cavity structure with an opening toward the bottom of the sliding cavity and at least partially covered by the sliding cavity;

[0010] A slide track is also provided between the sliding cavity and the piston for the latch pin to slide and limit the sliding path of the latch pin, the slide track is connected to the slot, and the slide track is parallel to the sliding direction of the piston relative to the sliding cavity;

[0011] or;

[0012] The door lifter also includes a telescopic sleeve with two ends fixedly connected to the telescopic arm and the mounting position respectively, the telescopic sleeve includes a first sub-sleeve and a second sub-sleeve, when the telescopic arm is extended and retracted between the working position and the non-working position, the first sub-sleeve at least covers a portion of the second sub-sleeve; a first guide mechanism is provided between at least a portion of the first sub-sleeve and a portion of the second sub-sleeve corresponding to the first sub-sleeve covering the second sub-sleeve, the first guide mechanism includes a first guide groove and a first guide protrusion matching the first guide groove, when the piston slides in the sliding cavity, the first guide protrusion slides in the first guide groove;

[0013] or;

[0014] A second guide mechanism is provided between the piston and the sliding cavity, the second guide mechanism comprising a second guide groove and a second guide protrusion matching the second guide groove, and when the piston slides in the sliding cavity, the second guide protrusion slides in the second guide groove;

[0015] At least part of the piston is a polygonal column that is more than a triangular column;

[0016] At least part of the second sub-set is a polygonal column that is more than a triangular column;

[0017] The sliding cavity is provided with a first buffer magnet, and the piston is provided with a second buffer magnet. The interaction force between the first buffer magnet and the second buffer magnet is opposite to the elastic force of the spring, so as to buffer the impact force of the piston moving in the direction of the blocking position.

[0018] A spring or a spring is also provided between the sliding cavity and the piston to push the latch pin into the latch slot;

[0019] The slot opening of the card slot is in a smooth transition to the path of the card pin sliding into the card slot; or; the side wall surface of the card slot is an inclined surface or an arc surface; or; the insertion surface of the card pin into the card slot is an arc surface;

[0020] A top block and an elastic member connected to the top block are also provided between the sliding cavity and the piston, one end of the top block is an ejection end for ejecting the bayonet pin from the slot, and the other end is a force-bearing end that receives external force so that the ejection end ejects the bayonet pin from the slot, the elastic member is a spring or a spring sheet, the elastic member resists the external force from the force-bearing end through the top block, and the force-bearing end is exposed on the outer surface of the door ejector or protrudes relative to the outer surface of the door ejector;

[0021] The ejector block includes a first block and a second block, the first block includes an ejector end, the second block includes a force-bearing end, the elastic member is connected to the first block, the second block abuts against the first block through an inclined surface, and when the second block pushes the first block, the first block slides along the inclined surface and ejects the bayonet pin from the slot through the ejector end;

[0022] The piston is cylindrical, and a sliding track is provided between the sliding cavity and the piston for the latch pin to slide and communicate with the latch slot;

[0023] The sliding track is a spiral track surrounding the piston;

[0024] or;

[0025] The sliding track includes a spiral track surrounding the piston and a straight track parallel to the expansion and contraction direction of the piston relative to the sliding chamber, and the straight track is connected to the spiral track;

[0026] The piston is a block structure or a cavity structure with an opening toward the bottom of the sliding cavity and at least partially covered by the sliding cavity. The door lifter also includes a sliding mechanism connecting the mounting position and the telescopic arm. The sliding mechanism includes a piston and a sliding cavity for the piston to slide. The piston is cylindrical. A bayonet and a sliding track for the bayonet to slide are provided between the sliding cavity and the piston.

[0027] The sliding track is a spiral track surrounding the piston;

[0028] or;

[0029] The sliding track includes a spiral track surrounding the piston and a straight track parallel to the expansion and contraction direction of the piston relative to the sliding chamber, and the straight track is connected to the spiral track;

[0030] When the telescopic arm is extended and retracted between the working position and the non-working position, the latch slides between the starting point and the end point of the slide track;

[0031] The door lifter also includes a first magnetic attraction and a second magnetic attraction;

[0032] The interaction force between the first magnetic attraction and the second magnetic attraction causes the latch to slide from one end of the straight track to the other end of the straight track;

[0033] or;

[0034] The sliding mechanism further comprises a spring connecting the piston and the sliding chamber, wherein the elastic force of the spring causes the bayonet to slide from one end of the straight track to the other end of the straight track;

[0035] The spiral track is a circular arc track surrounding the piston;

[0036] The door lifter also includes a telescopic mechanism connecting the mounting position and the telescopic arm, the telescopic mechanism includes a first external block, a second external block and a sliding channel located between the first external block and the second external block, the second external block is connected to the mounting position or the telescopic arm through a spring, one end of the sliding channel is provided with an opening for the first external block to slide into the sliding channel, and the other end is provided with a resisting groove that abuts against the second external block to prevent the second external block from entering the sliding channel, the resisting groove includes deep grooves and shallow grooves adjacent to each other, the second external block is provided with a convex head abutted by the resisting groove, and the first external block is provided with a protrusion. The block is provided with a push head for pushing the convex head out of the resisting groove, the push head is provided with a first inclined surface against the convex head, the convex head is provided with a second inclined surface matching the first inclined surface, the length of the first inclined surface is greater than the length of the second inclined surface, when the push head pushes the convex head out of the resisting groove, the second inclined surface slides along the first inclined surface under the push of the spring force, driving the convex head to rotate along the first inclined surface to the opening position of the resisting groove adjacent to the resisting groove and insert it, when the telescopic arm is extended and retracted between the working position and the non-working position, the convex head switches between inserting into the shallow groove and inserting into the deep groove;

[0037] The opening end of the retaining groove is provided with a transition slope connected to the bottom of the retaining groove, and the transition slope matches the second slope;

[0038] A sliding head and a sliding groove for sliding the sliding head are provided between the first external block and the sliding channel;

[0039] or;

[0040] The door lifter also includes a telescopic sleeve with two ends respectively fixedly connected to the telescopic arm and the mounting position, the telescopic sleeve includes a first sub-sleeve and a second sub-sleeve, and when the telescopic arm is extended between the working position and the non-working position, the first sub-sleeve at least covers a portion of the second sub-sleeve;

[0041] A first guide mechanism is provided between at least a portion of the first sub-sleeve and a portion of the second sub-sleeve corresponding to the portion where the first sub-sleeve covers the second sub-sleeve, wherein the first guide mechanism comprises a first guide groove and a first guide protrusion matching the first guide groove, and when the first external block slides in the sliding channel, the first guide protrusion slides in the first guide groove;

[0042] The first external block that slides in the sliding channel is at least a polygonal column with a triangular column shape or more;

[0043] At least part of the second sub-set is a polygonal column that is more than a triangular column;

[0044] The first external block and the second external block are magnetically attracted to each other;

[0045] or;

[0046] The telescopic arm and the mounting position are magnetically attracted to each other;

[0047] or;

[0048] The first inclined surface and the second inclined surface are magnetically attracted to each other, so that the first inclined surface and the second inclined surface are always in contact with each other;

[0049] The resisting area is located at the top or side of the telescopic arm. The resisting area is a cavity structure and is provided with an opening for inserting the door lock handle and a resisting surface against the door lock handle. When the telescopic arm is in the working position, the door lock handle enters the resisting area;

[0050] The resisting area is located at the top end of the telescopic arm, and the resisting area is provided with a blocking surface for preventing the telescopic arm from further moving toward the door lock handle when the telescopic arm is in the working position;

[0051] The blocking surface is made of an elastic material or an elastic surface made of an elastic material is laid on the blocking surface; or; the resisting surface is made of an elastic material or an elastic surface made of an elastic material is laid on the blocking surface;

[0052] The resisting area is located on a side of the telescopic arm facing the rotation direction of the door lock handle, and the resisting area is a resisting surface against the door lock handle;

[0053] The resisting surface is made of an elastic material or an elastic surface made of an elastic material is laid on the resisting surface;

[0054] The installation position is arranged inside the door or on the door panel;

[0055] The installation position is a split structure, including a base fixed on the door panel and a installation position body detachably connected to the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the structure of a door lifter currently on the market as described in the background technology section;

[0057] Figure 2 is a schematic diagram of the axial cross-section structure of a door lifter described in Example 1 when the telescopic arm is in a fully extended state relative to the installation position;

[0058] Figure 3 is a schematic diagram of the axial cross-section structure of a door lifter described in Example 1 when the telescopic arm is in a fully retracted state relative to the installation position;

[0059] Figure 4 is a schematic diagram of the axial cross-section structure of the top block described in Example 2;

[0060] Figure 5 is a schematic diagram of the cross-sectional structure of the piston and the sliding chamber described in Example 3;

[0061] Figure 6 is a schematic diagram of the cross-sectional structure of the piston and the sliding chamber described in Example 4;

[0062] Figure 7 is a schematic diagram of the cross-sectional structure of the telescopic sleeve described in Example 5;

[0063] Figure 8 is a schematic diagram of the cross-sectional structure of the telescopic sleeve described in Example 6;

[0064] Fig. 9 is a schematic diagram of the three-dimensional structure of the telescopic sleeve described in Example 7;

[0065] Fig.10 is a schematic diagram of the expansion of the inner surface of the sliding cavity described in Example 8;

[0066] Fig.11 is a schematic diagram of the expansion of the inner surface of the sliding cavity described in Example 9;

[0067] Fig.12 is a schematic diagram of the expansion of the inner surface of the sliding cavity described in Example 12;

[0068] Fig.13 is a schematic diagram of the expansion of the inner surface of the sliding cavity described in Example 13;

[0069] Fig.14 is a schematic diagram of the expansion of the inner surface of the sliding cavity described in Example 14;

[0070] Fig.15 It is a three-dimensional structural schematic diagram of a state of the telescopic mechanism described in Example 15;

[0071] Fig.16 is a schematic diagram of the three-dimensional structure of the telescopic mechanism in another state described in Example 15;

[0072] Fig.17 is a schematic diagram of the cross-sectional structure of the first external block and the sliding channel in Example 16;

[0073] Fig.18 is a schematic diagram of the cross-sectional structure of the telescopic sleeve described in Example 18;

[0074] Fig.19 It is a schematic diagram of the three-dimensional structure of the telescopic sleeve described in Example 19. DETAILED DESCRIPTION

[0075] This section is a detailed explanation of the content of the utility model. It should be noted that the magnetic attraction described in the utility model does not only refer to magnets, but can also refer to materials that can attract each other with magnets, such as iron, etc. Therefore, if mutual attraction is required, a magnet and iron or two magnets with opposite polarities can be used. If mutual repulsion is required, two magnets with the same polarity can be used.

[0076] As described in the content of the utility model, the utility model provides a door lifter, which acts on a door lock handle, and includes a telescopic arm and a mounting position. The telescopic arm as a whole is telescopic relative to the mounting position. When the telescopic arm is fully extended, the telescopic arm is in a working position close to the door lock handle. At this time, the blocking area abuts against the door lock handle to prevent the door lock handle from rotating. When the telescopic arm is fully retracted, the telescopic arm is in a non-working position close to the mounting position.

[0077] When the consumer needs to lift the door, the telescopic arm is pulled out from the installation position to the working position. When the consumer does not need to lift the door, the telescopic arm is pushed into the installation position. The telescopic arm does not contact the door panel during the extension and retraction process, so as to avoid the telescopic arm occupying the additional surface of the door panel. The operation steps only involve the extension and retraction of the telescopic arm relative to the installation position, which is extremely simple.

[0078] On the basis of the above, the utility model has made some improvements. For example, in some embodiments, the firmness of the telescopic arm staying in the working position and the non-working position is increased. This part of the embodiment adds a sliding mechanism connecting the mounting position and the telescopic arm. The sliding mechanism includes a piston, a sliding cavity for the piston to slide, and a spring connecting the piston and the sliding cavity. The piston of the utility model can be a conventional piston, that is, a block structure, or a cavity structure with an opening toward the bottom of the sliding cavity and at least partially covered by the sliding cavity. The sliding cavity is provided with a blocking position to block the piston from sliding relative to the sliding cavity in the direction of the spring elastic force. When the blocking position blocks the piston from sliding, the force on the piston reaches a balance, so that the piston stays more firmly. In addition, a clamping position for clamping the piston is provided between the sliding cavity and the piston. The clamping position includes a clamping groove and a clamping pin inserted into the clamping groove. When the clamping pin is inserted into the clamping groove to form a clamping position, the force on the piston reaches a balance, so that the piston stays more firmly. That is, when the telescopic arm is telescoped between the working position and the non-working position, the piston slides between the clamping position and the blocking position.

[0079] When the piston slides relative to the sliding cavity, the sliding track of the bayonet may be separated from the slot. In some embodiments, a sliding track for the bayonet to slide is added between the sliding cavity and the piston. The sliding track is connected to the slot to ensure that the bayonet can be smoothly inserted into the slot as the piston slides. Other embodiments do not have the above technical solution, but add a second guide mechanism between the piston and the sliding cavity. The mechanism includes a second guide groove and a second guide protrusion matching the second guide groove. When the piston slides in the sliding cavity, the second guide protrusion slides in the second guide groove to prevent the piston from rotating relative to the sliding cavity during the sliding process in the sliding cavity, so that the bayonet deviates from the sliding track connected to the slot. A further solution is to set the shape of the piston to a polygonal column that is at least three-sided or more, so as to completely prevent the piston from rotating relative to the sliding cavity when sliding in the sliding cavity. In addition, some embodiments provide different technical solutions, that is, a telescopic sleeve with two ends fixedly connecting the mounting position and the telescopic arm is added between the mounting position and the telescopic arm of the sliding mechanism, and the telescopic sleeve includes a first sub-sleeve and a second sub-sleeve. When the telescopic arm is telescoped between the working position and the non-working position, the first sub-sleeve at least covers part of the second sub-sleeve, and a first guide mechanism is provided between at least the first sub-sleeve and part of the second sub-sleeve where the first sub-sleeve covers the second sub-sleeve. The first guide mechanism includes a first guide groove and a first guide protrusion matching the first guide groove. When the piston slides in the sliding cavity, the first guide protrusion slides in the first guide groove to prevent the piston from rotating relative to the sliding cavity during the sliding process in the sliding cavity, so that the bayonet deviates from the sliding track of the connecting slot. A further solution is to set the shape of the second sub-sleeve to a polygonal column that is at least a triangular column, so as to completely prevent the piston from rotating relative to the sliding cavity when sliding in the sliding cavity. The above technical solutions for solving the problem of the piston rotating relative to the sliding cavity when sliding in the sliding cavity can be selected or used in combination at will, and the corresponding effect will be better.

[0080] Under the action of spring force, the piston in some embodiments moves rapidly in the sliding cavity, thereby generating a strong impact force at the blocking position, which is very easy to damage the door lifter. For this reason, some embodiments provide a first buffer magnet in the sliding cavity and a second buffer magnet on the piston. The first buffer magnet and the second buffer magnet repel each other, which can greatly buffer the impact force of the piston moving toward the blocking position and extend the service life of the door lifter.

[0081] In some embodiments, the pin can be automatically inserted into the slot from the slot opening without manual force. These embodiments add a spring or a spring to push the pin into the slot. If the pin needs to be disengaged from the slot, a large pulling force needs to be applied to the piston, which is usually very difficult and may even damage the door lifter. As an improvement, some embodiments have a smooth transition at the slot opening adjacent to the path where the pin slides into the slot. In other embodiments, the side wall surface of the slot where the pin is inserted into the slot is set to a slope or an arc surface, so that when the pin slides out of the slot, it is smoother and less labor-intensive.

[0082] A better solution is to add a top block and an elastic member (such as a spring or a spring sheet, etc.) connected to the top block between the sliding cavity and the piston, one end of the top block is an ejection end, which ejects the bayonet pin out of the slot, and the other end is a force-bearing end, which receives external force so that the ejection end can smoothly eject the bayonet pin out of the slot, and the elastic member resists the external force through the top block, so that the top block will not eject the bayonet pin from the slot when not affected by external force. Of course, the force-bearing end is exposed on the surface of the door ejector, and the operator can easily apply external force to the top block. The top block is usually an integrated structure, but in some embodiments, considering that the specific installation position of the top block may cause the position of the force-bearing end to be inconvenient for the operator to operate, the top block is set to a split structure. Specifically, the top block includes a first block and a second block, the first block includes an ejection end, and the second block includes a force-bearing end, the elastic member is connected to the first block, and the second block is against the first block through an inclined surface. When the second block pushes the first block, the first block slides along the inclined surface and ejects the pin from the slot.

[0083] Some embodiments also provide a solution that does not use a top block but can also disengage the bayonet from the slot. The piston used in this solution is cylindrical. In addition to sliding relative to the sliding cavity, the piston can also rotate relative to the sliding cavity, wherein a sliding track for the bayonet to slide and connect to the slot is provided between the sliding cavity and the piston. In some embodiments, the sliding track includes a spiral track around the piston. When the piston rotates relative to the sliding cavity, the bayonet slides on the spiral track and pushes the piston to telescope relative to the sliding cavity, so that the telescopic arm moves between the working position and the non-working position. In some embodiments, a straight track parallel to the telescopic direction of the piston relative to the sliding cavity is added to the sliding track, and the straight track is connected to the spiral track. In this way, when the piston rotates and telescopes relative to the sliding cavity, the bayonet slides in the spiral track, and after the bayonet enters the straight track, the piston can directly telescope and slide relative to the sliding cavity. As a special case, the sliding track includes a circular arc track around the piston and a straight track connected to the circular arc track. In this way, when the piston rotates relative to the sliding cavity, the bayonet slides in the circular arc track, and the piston will not telescope relative to the sliding cavity.

[0084] Some of the above embodiments may further not use the slot, so that the bayonet slides only in the slide track. When the piston is extended and retracted relative to the sliding cavity, the bayonet slides between the starting point and the end point of the slide track. In some cases, the slide track is only a spiral track, and the bayonet can be stuck at the starting point or the end point of the spiral track, so there is no need to set up a slot separately. Of course, in other cases, the slide track also includes a straight track parallel to the direction of extension and retraction of the piston relative to the sliding cavity, and the straight track is connected to the spiral track. The door lifter also includes a first magnetic attraction and a second magnetic attraction. The interaction force between the first magnetic attraction and the second magnetic attraction causes the bayonet to slide from one end of the straight track to the other end of the straight track, so that the bayonet can stay firmly at the starting point and the end point of the slide track, thereby ensuring that the telescopic arm stays firmly in the working position and the non-working position.

[0085] Some embodiments of the utility model further provide a telescopic arm extension and retraction scheme with a simpler operation. In these embodiments, the door lifter is additionally provided with a telescopic mechanism connecting the mounting position and the telescopic arm. The telescopic mechanism includes a first external block, a second external block, and a sliding channel located between the first external block and the second external block. The second external block is connected to the mounting position or the telescopic arm through a spring. One end of the sliding channel is provided with an opening for the first external block to slide into the sliding channel, and the other end is provided with a resisting groove that resists the second external block to prevent the second external block from entering the sliding channel. The resisting groove includes a deep groove and a shallow groove adjacent to each other. The second external block The block is provided with a convex head which is resisted by the resisting groove, the first external block is provided with a pushing head which pushes the convex head away from the resisting groove, the pushing head is provided with a first inclined surface which resists the convex head, the convex head is provided with a second inclined surface which matches the first inclined surface, the length of the first inclined surface is greater than the length of the second inclined surface, when the pushing head pushes the convex head out of the resisting groove, the second inclined surface slides along the first inclined surface under the push of the spring force, drives the convex head to rotate along the first inclined surface to the opening position of the resisting groove adjacent to the resisting groove and insert it, when the telescopic arm is extended and retracted between the working position and the non-working position, the convex head switches between inserting into the shallow groove and inserting into the deep groove.

[0086] As a preference, some embodiments increase the smoothness of the insertion of the protrusion into the resisting groove, that is, a transition slope connected to the bottom of the resisting groove is provided at the open end of the resisting groove, and the transition slope matches the second slope. When the protrusion is inserted into the resisting groove under the push of the spring force, the second slope drives the protrusion to slide into the bottom of the resisting groove along the transition slope.

[0087] When the first external block slides relative to the sliding channel, the first external block may rotate relative to the sliding channel, so that the first inclined surface cannot be accurately aligned with the second inclined surface. For this reason, some embodiments add a sliding head to the first external block, and the sliding channel is provided with a sliding groove for the sliding head to slide. Some embodiments provide a sliding head in the sliding channel, and the first external block is provided with a sliding groove for the sliding head to slide. A further technical solution is that the part of the first external block sliding in the sliding channel is at least a polygonal column with a triangular column shape or more.

[0088] Of course, it is also possible not to have a sliding head and a sliding groove between the first external block and the sliding channel, that is, to add a telescopic sleeve with two ends fixedly connected to the telescopic arm and the mounting position respectively, the telescopic sleeve includes a first sub-sleeve and a second sub-sleeve, when the telescopic arm is telescoped between the working position and the non-working position, the first sub-sleeve at least covers part of the second sub-sleeve, at least a first guide mechanism is provided between the part of the first sub-sleeve and part of the second sub-sleeve corresponding to the part of the first sub-sleeve covering the second sub-sleeve, the first guide mechanism includes a first guide groove and a first guide protrusion matching the first guide groove, when the first external block slides in the sliding channel, the first guide protrusion slides in the first guide groove, preventing the first external block from rotating relative to the sliding channel during the sliding process in the sliding channel, so that the first inclined surface cannot be accurately aligned with the second inclined surface. A further solution is to set the shape of the second sub-sleeve to be at least partially a polygonal column with a triangular column shape or more, completely preventing the first external block from rotating relative to the sliding channel when sliding in the sliding channel.

[0089] As described above, the second external block is blocked by the retaining groove, and after the first external block is blocked by the retaining groove, there may be a situation where the first external block slides freely along the sliding channel, so that the extension and retraction of the telescopic arm relative to the mounting position cannot ensure that it stays firmly in the working position and the non-working position of the telescopic arm. In some embodiments, the first external block and the second external block are magnetically attracted to each other, for example, magnets are added to the first external block and / or the second external block, or the telescopic arm and the mounting position are magnetically attracted to each other, for example, magnets are added to the telescopic arm and / or the mounting position, or the first inclined surface and the second inclined surface are magnetically attracted to each other, for example, magnets are added to the first inclined surface and the second inclined surface, so that the first inclined surface and the second inclined surface attract each other, ensuring that the first external block and the second external block move basically synchronously, so that the extension and retraction of the telescopic arm relative to the mounting position can stay firmly in the working position and the non-working position of the telescopic arm.

[0090] As for the portion of the door lifter that prevents the door lock handle from rotating, the utility model provides a resisting area at the portion of the telescopic arm close to the door lock handle. The resisting area is a cavity structure and is provided with an opening for inserting the door lock handle and a resisting surface that resists the door lock handle. The resisting area can be provided at the top or side of the telescopic arm. Some embodiments adopt a solution of providing the resisting area at the top of the telescopic arm. In this solution, the resisting area can be further provided on a blocking surface that prevents the telescopic arm from further moving toward the door lock handle when the telescopic arm is in the working position, thereby replacing the related functions of the blocking position. Preferably, the blocking surface is made of an elastic material or an elastic surface made of an elastic material is laid on the blocking surface, which can greatly buffer the impact force of the telescopic arm on the door lock handle when the telescopic arm moves to the working position. Similarly, the resisting surface can also be made of an elastic material or an elastic surface made of an elastic material is laid on the resisting surface, which can greatly buffer the impact force of the door lock handle on the telescopic arm when the door lock handle rotates, thereby preventing damage to the door lifter.

[0091] Of course, the resistance zone may not adopt a cavity structure. For example, in some embodiments, the resistance zone of the door lifter is located on the side of the telescopic arm toward the rotation direction of the door lock handle, and the resistance zone is only a resistance surface that resists the door lock handle. Similarly, as a preference, the resistance surface may also be made of elastic material or an elastic surface made of elastic material may be laid on the resistance surface, which can greatly cushion the impact force on the telescopic arm when the door lock handle rotates, thereby preventing damage to the door lifter.

[0092] Example 1

[0093] See Figure 2 A door lifter includes a mounting position 4 and a telescopic arm 1, wherein the mounting position 4 is mounted on a door panel or inside the door panel ( Figure 2 The door panel is not shown), the telescopic arm 1 as a whole is telescopic relative to the mounting position 4, and the specific method of realizing the telescopic extension is that the door lifter described in this embodiment also includes a sliding mechanism connecting the mounting position 4 and the telescopic arm 1, and the sliding mechanism includes a piston 2 and a sliding cavity 8 for the piston to slide. The piston 2 moves back and forth in the sliding cavity 8, driving the telescopic arm 1 as a whole to extend and retract relative to the mounting position 4. In this embodiment, the piston 2 is a cavity structure with an opening toward the bottom of the sliding cavity 8, and of course it can also be a solid block structure. The telescopic arm 1 and the piston can be directly connected or indirectly connected. Similarly, the sliding cavity 8 can be directly connected to the mounting position 4 or indirectly connected. In this embodiment, the telescopic arm 1 is fixedly connected to the piston 2, and the mounting position 4 is fixedly connected to the sliding cavity 8. Of course, the telescopic arm 1 can also be connected to the sliding cavity 8, and the piston 2 can be connected to the mounting position 4.

[0094] Figure 2The state shown is that the telescopic arm 1 is in a fully extended state relative to the mounting position 4. In this state, the telescopic arm 1 is in a working position, that is, the stop area 6 of one side 7 of the telescopic arm just faces the rotation direction of the door lock handle 5 to block the door lock handle 5, thereby preventing the door from being opened. In this embodiment, the stop area 6 is a stop surface. In order to buffer the impact force caused by the rotation of the door lock handle 5 on the stop surface, the stop surface is made of elastic material or the stop surface is paved with an elastic surface made of elastic material.

[0095] See Figure 3 The door lifter shown in this figure omits one side of the telescopic arm 7, the stopper area 6 and the door lock handle 5. Figure 3 The state shown is that the telescopic arm 1 is in a fully retracted state relative to the installation position 4. In this state, the telescopic arm 1 is in a non-working position, that is, the telescopic arm 1 is completely separated from the rotation surface formed by the rotation of the door lock handle 5, so that the rotation of the door lock handle 5 is not prevented, and the door can be opened freely.

[0096] In addition to realizing the telescopic movement of the telescopic arm 1 relative to the mounting position 4, the door lifter of this embodiment can also realize the secure retention of the telescopic arm 1 in the working position and the non-working position. Figure 3 A stopper is provided between the piston 2 and the sliding chamber 8, and the stopper includes a slot 14 and a stopper pin 10 inserted into the slot 14. Specifically, the stopper pin 10 is provided on the piston 2, and the slot 14 is provided on the sliding chamber 8. Of course, the other way around is also possible, that is, the stopper pin 10 is provided on the sliding chamber 8, and the slot 14 is provided on the piston 2. Figure 2 , 3 Taking the situation shown as an example, when the pin 10 enters the slot 14, that is, the piston 2 is in the locked position, the telescopic arm 1 is in the non-working position and stays firmly, and when the telescopic arm 1 is in the working state, the top of the piston 2 is blocked by the blocking position 15 of the sliding chamber 8, and at the same time, the sliding mechanism is additionally provided with a spring 3 connecting the piston 2 and the sliding chamber 8. Under the action of the spring 3 and the blocking position 15, the telescopic arm 1 is in the working position and stays firmly.

[0097] When the telescopic arm 1 needs to be converted from the working position to the non-working position, the piston 2 is pushed to move in the locking direction by the telescopic arm 1, and the bayonet 10 can be automatically inserted into the slot 14. For example, a spring 16 is provided next to the bayonet 10 in this embodiment to push the bayonet 10 into the slot 14. Of course, the spring can also be replaced by a spring.

[0098] When the telescopic arm 1 needs to be switched from the non-working position to the working position, the user usually pulls the latch 10 out of the slot 14 through the telescopic arm 1. In order to smoothly pull out the latch 10, the notch of the slot 14 is adjacent to the portion 17 of the path where the latch 10 slides into the slot 14, and the notch of the slot 14 is smoothly transitioned ( Figure 3The side wall of the card slot 14 can also be set as an inclined surface or an arc surface, and the insertion surface of the card pin 10 into the card slot 14 can also be set as an arc surface. To further enhance the effect, the user can use the above-mentioned improvement measures in combination. The difference is that this embodiment adopts an improvement scheme, that is, a top block 11 and a spring 13 connected to the top block 11 are added between the sliding cavity 8 and the piston 2, and one end of the top block 11 is an ejection end ( Figure 3 The other end is the force-bearing end 12, which receives external force and pushes the ejection end to eject the pin 10 from the slot 14. The force-bearing end 12 is exposed on the outer surface of the door lifter or protrudes relative to the outer surface of the door lifter, which is convenient for the user to operate the lift block. When the user stops applying force to the force-bearing end 12, the lift block 11 rebounds to a state where no force is applied under the action of the spring sheet 13.

[0099] The spring 3 then drives the piston 2 to slide in the direction of the blocking position. In this embodiment, a first buffer magnetic attraction is set in the sliding cavity, and a second buffer magnetic attraction is set in the piston 2. The first buffer magnetic attraction and the second buffer magnetic attraction repel each other ( Figure 2 and Figure 3 The first buffer magnet and the second buffer magnet are not shown), which can greatly buffer the impact force of the piston moving in the direction of the blocking position, thereby extending the service life of the door lifter.

[0100] As the telescopic arm 1 moves between the working position and the non-working position, the latch 10 slides in the sliding cavity 8. Figure 2 As shown, the sliding cavity 8 described in this embodiment has a sliding space 9 for the sliding of the pin 10, and the sliding space 9 does not limit the sliding trajectory of the pin 10, so that when the telescopic arm 1 is in the working position, the blocking area 6 cannot face the door lock handle 5, and the user needs to rotate the telescopic arm 1 for further adjustment. Figure 3 The figure shows an improved version of the present embodiment, that is, the sliding space is changed into a slide track 18 for the latch pin 10 to slide and to limit the sliding path of the latch pin 10, the slide track 18 is connected with the slot 14, the slide track 18 is parallel to the sliding direction of the piston 2 relative to the sliding chamber 8, and the latch pin 10 is ensured to slide through the slide track 18, so that when the telescopic arm 1 reaches the working position, the blocking area 6 is opposite to the door lock handle 5.

[0101] Example 2

[0102] See Figure 4 , Embodiment 2 is basically the same as Embodiment 1, except that the top block includes a first sub-block 19 and a second sub-block 21, the first sub-block 19 includes an ejection end 22, the second sub-block 21 includes a force-bearing end 23, the first sub-block 19 and the spring ( Figure 4The second block 21 is connected to the first block 19 by the inclined surface 20 to prevent the ejection end 22 of the first block 19 from resisting the pin inserted into the slot. The second block 21 resists the first block 19 through the inclined surface 20. When the second block 21 pushes the first block 19, the first block 19 slides along the inclined surface and the force-bearing end 23 protrudes relative to the outer surface of the door ejector through the ejection end 22, which is convenient for the user to operate. This embodiment also provides an application scenario of the ejection block, that is, the slot is set on the piston, the pin is set on the inner surface of the sliding cavity, the second block 21 enters from the top of the telescopic arm and extends into the piston, the first block 19 is connected to the sliding cavity, and when the telescopic arm is in the non-working position, the second block 21 resists the first block 19 through the inclined surface 20. At this time, the force-bearing end 23 protruding from the top surface of the telescopic arm is pressed, and the second block 21 pushes the first block 19, so that the first block 19 slides along the inclined surface 20 and ejects the pin from the slot through the ejection end 22.

[0103] Example 3

[0104] See Figure 5 Embodiment 3 is basically the same as Embodiment 1, except that the piston 31 and the sliding cavity 30 in the door lifter described in this embodiment are both cylindrical, and a second guide mechanism is arranged between the piston 31 and the sliding cavity 30, and the mechanism includes a second guide groove 29 arranged on the inner surface of the sliding cavity 30 and a second guide protrusion 28 arranged on the outer surface of the piston 31. When the piston 31 slides in the sliding cavity 30, the second guide protrusion 28 slides in the second guide groove 29 to ensure that the sliding path of the latch does not change, so that when the telescopic arm reaches the working position, the blocking area is opposite to the door lock handle.

[0105] Example 4

[0106] See Figure 6 Embodiment 4 is basically the same as Embodiment 3, except that a second guide mechanism is provided between the piston 32 and the sliding cavity 33, and the mechanism includes a second guide protrusion 34 provided on the inner surface of the sliding cavity 33 and a second guide groove 35 provided on the outer surface of the piston 32. When the piston 32 slides in the sliding cavity 33, the second guide protrusion 34 slides in the second guide groove 35 to ensure that the sliding path of the latch does not change, so that when the telescopic arm reaches the working position, the blocking area is opposite to the door lock handle.

[0107] Example 5

[0108] See Figure 7Embodiment 5 is basically the same as embodiment 1, except that the door lifter described in this embodiment further includes a telescopic sleeve having two ends fixedly connected to the telescopic arm and the mounting position respectively, and the telescopic sleeve includes a first sub-sleeve 38 and a second sub-sleeve 39, and the first sub-sleeve 38 and the second sub-sleeve 39 are both cylindrical. When the telescopic arm is extended and retracted between the working position and the non-working position, the first sub-sleeve 38 at least covers a portion of the second sub-sleeve 39, and a first guide mechanism is provided between at least the portion of the first sub-sleeve 38 and the portion of the second sub-sleeve 39 corresponding to the first sub-sleeve 38 covering the second sub-sleeve 39, and the mechanism includes a first guide groove 37 arranged on the inner surface of the first sub-sleeve 38 and a first guide protrusion 36 arranged on the outer surface of the second sub-sleeve 39. When the piston slides in the sliding cavity, the first guide protrusion 36 slides in the first guide groove 37 to ensure that the sliding path of the bayonet does not change, so that when the telescopic arm reaches the working position, the blocking area is directly opposite to the door lock handle.

[0109] Example 6

[0110] See Figure 8 Embodiment 6 is basically the same as Embodiment 5, except that a first guide mechanism is provided between at least a portion of the first sub-sleeve 41 and a portion of the second sub-sleeve 40 corresponding to the first sub-sleeve 41 covering the second sub-sleeve 40, and the mechanism includes a first guide protrusion 43 provided on the inner surface of the first sub-sleeve 41 and a first guide groove 42 provided on the outer surface of the second sub-sleeve 40. When the piston slides in the sliding cavity, the first guide protrusion 43 slides in the first guide groove 42 to ensure that the sliding path of the bayonet does not change, so that when the telescopic arm reaches the working position, the blocking area is opposite to the door lock handle.

[0111] Example 7

[0112] See Fig. 9 Embodiment 7 is basically the same as Embodiment 6, wherein the first sub-sleeve 25 is fixedly connected to the mounting position 24, and the second sub-sleeve 26 is fixedly connected to the telescopic arm 27, the difference being that the first sub-sleeve 25 and the second sub-sleeve 26 are both in the shape of a quadrilateral column, ensuring that the sliding path of the latch does not change, so that when the telescopic arm reaches the working position, the blocking area is directly opposite to the door lock handle.

[0113] Example 8

[0114] See Fig.10, the figure is a schematic diagram of the expansion of the inner surface of the sliding cavity of Example 8. Example 8 is basically the same as Example 1, except that the shape of the piston is further limited to a cylindrical shape, the door-lifting device is not provided with a spring and a slot, and the inner surface of the sliding cavity is provided with a spiral track 44 for the sliding of the bayonet. When the telescopic arm is extended between the working position and the non-working position, the bayonet slides between the starting point and the end point of the spiral track 44. The user can rotate the telescopic arm to make the bayonet slide on the spiral track 44, thereby allowing the telescopic arm to extend and retract relative to the mounting position.

[0115] Example 9

[0116] See Fig.11 , which is a schematic diagram of the inner surface of the sliding cavity of Example 9. Example 9 is basically the same as Example 8, except that in addition to the spiral track 45, the inner surface of the sliding cavity is also provided with a straight track 46 for the bayonet to slide and parallel to the direction of the piston relative to the sliding cavity, and the straight track 46 is connected to the spiral track. In order to extend and retract the telescopic arm relative to the installation position, when the bayonet slides on the spiral track 45, the user needs to rotate the telescopic arm, and when the bayonet slides on the straight track 46, the user only needs to push and pull the telescopic arm.

[0117] Example 10

[0118] Embodiment 10 is basically the same as Embodiment 9, except that the door lifter further includes a first magnetic attraction and a second magnetic attraction, and the interaction force between the first magnetic attraction and the second magnetic attraction causes the latch to slide from one end of the straight track to the other end.

[0119] Embodiment 11

[0120] Embodiment 11 is basically the same as Embodiment 9, except that the spring is reused, that is, the sliding mechanism further includes a spring connecting the piston and the sliding chamber, and the elastic force of the spring causes the latch to slide from one end of the straight track to the other end of the straight track.

[0121] Example 12

[0122] See Fig.12 , the figure is a schematic diagram of the expansion of the inner surface of the sliding chamber of Example 12. Example 12 is basically the same as Example 1, except that the shape of the piston is further limited to a cylindrical shape, and the inner surface of the sliding chamber is provided with a spiral track 47 for the sliding of the bayonet and connected to the slot 48. When the telescopic arm is extended and retracted between the working position and the non-working position, the bayonet slides between the starting point and the end point of the spiral track.

[0123] Example 13

[0124] See Fig.13, this figure is a schematic diagram of the expanded inner surface of the sliding chamber of Example 13. Example 12 is basically the same as Example 11, except that in addition to the spiral track 49 for the latch pin to slide and connected to the slot 51, the inner surface of the sliding chamber also has a straight track 50 for the latch pin to slide and parallel to the expansion and contraction direction of the piston relative to the sliding chamber, and the straight track 50 is connected to the spiral track 49.

[0125] Embodiment 14

[0126] See Fig.14 , which is a schematic diagram of the inner surface of the sliding cavity of Example 14. Example 14 is basically the same as Example 8, except that the spiral track is a circular arc track 52, and a straight track 53 is provided for the bayonet to slide and is parallel to the expansion and contraction direction of the piston relative to the sliding cavity, and the straight track 53 is connected to the circular arc track 52. In order to extend and contract the telescopic arm relative to the installation position, when the bayonet slides on the circular arc track 52, the user needs to rotate the telescopic arm, and when the bayonet slides on the straight track 53, the user only needs to push and pull the telescopic arm.

[0127] Embodiment 15

[0128] See Fig.15 and Fig.16 This embodiment is substantially the same as the first embodiment, the main difference being that the door lifter of this embodiment is not provided with a sliding mechanism, but is provided with a telescopic mechanism instead. The telescopic mechanism comprises a first external block 55, a second external block 61, and a sliding channel 56 located between the first external block 55 and the second external block 61. The second external block 61 is provided with a spring ( Fig.14 (not shown) connecting mounting position or telescopic arm, one end of the sliding channel 56 is provided with an opening 54 for the first external block 55 to slide into the sliding channel 56, and the other end is provided with a resisting groove for resisting the second external block 61 to prevent the second external block 61 from entering the sliding channel 56, the resisting groove includes a deep groove 57 and a shallow groove 58 adjacent to each other, the second external block 61 is provided with a convex head 63 resisted by the resisting groove, the first external block 56 is provided with a push head 59 for pushing the convex head 63 to leave the resisting groove, the push head 59 is provided with a first inclined surface 60 resisting the convex head 63, the convex head 63 is provided with a second inclined surface 64 matching the first inclined surface 60, the length of the first inclined surface 60 is greater than the length of the second inclined surface 65, Fig.15 The state of the telescopic mechanism shown is that the push head 59 pushes the protrusion 63 to disengage from the shallow groove 58. Subsequently, the second inclined surface 64 slides along the first inclined surface 60 under the push of the spring force, driving the protrusion 63 to rotate along the first inclined surface 60 to the transition inclined surface 62 facing the deep groove 57. The transition inclined surface 62 matches the second inclined surface 64, so that the protrusion 63 is inserted into the deep groove 57 along the transition inclined surface 62 and under the push of the spring force. Fig.16The state of the telescopic mechanism shown is that the push head 59 pushes the convex head 63 to be disengaged from the deep groove 57, and then the second inclined surface 64 slides along the first inclined surface 60 under the force of the spring, driving the convex head 63 to rotate along the first inclined surface 60 to the transition inclined surface 65 facing the shallow groove 58, and the transition inclined surface 65 matches the second inclined surface 64, so that the convex head 63 follows the transition inclined surface 62 and is pushed by the spring force, and is inserted into the shallow groove 58. When the telescopic arm is extended and retracted between the working position and the non-working position, the convex head 63 switches between inserting into the shallow groove 58 and inserting into the deep groove 57.

[0129] Example 16

[0130] See Fig.17 This embodiment is basically the same as embodiment 15, except that a slide groove 66 is provided on the sliding channel 56, and a sliding head 67 sliding in the slide groove 66 is provided on the first external block 55 to prevent the first external block 55 from rotating relative to the sliding channel 56 when sliding relative to the sliding channel 56.

[0131] Embodiment 17

[0132] Embodiment 17 is basically the same as Embodiment 15, except that the first external block 55 is not entirely cylindrical, but the first external block is cylindrical in the portion close to the second external block 61, and is square columnar in the portion sliding in the sliding channel 56, so as to prevent the first external block 55 from rotating relative to the sliding channel 56 when sliding.

[0133] Embodiment 18

[0134] See Fig.18 Embodiment 18 is basically the same as embodiment 15, except that the door lifter described in this embodiment further includes a telescopic sleeve having two ends fixedly connected to the telescopic arm and the mounting position respectively, the telescopic sleeve includes a first sub-sleeve 68 and a second sub-sleeve 69, both of which are cylindrical. When the telescopic arm is extended and retracted between the working position and the non-working position, the first sub-sleeve 68 at least covers a portion of the second sub-sleeve 69, and a first guide mechanism is provided between at least the portion of the first sub-sleeve 68 and the portion of the second sub-sleeve 69 corresponding to the portion of the first sub-sleeve 68 and the portion of the second sub-sleeve 69 where the first sub-sleeve 68 covers the second sub-sleeve 69. The mechanism includes a first guide groove 70 provided on the inner surface of the first sub-sleeve 68 and a first guide protrusion 71 provided on the outer surface of the second sub-sleeve 69. When the first external block slides in the sliding channel, the first guide protrusion 71 slides in the first guide groove 70 to prevent the first external block from rotating relative to the sliding channel.

[0135] Embodiment 19

[0136] See Fig.19Embodiment 19 is basically the same as embodiment 18, except that the second sub-sleeve 73 fixedly connected to the telescopic sleeve 72 and the first sub-sleeve 75 fixedly connected to the mounting position 74 are both in the shape of square columns to prevent the first external block from rotating relative to the sliding channel.

[0137] Embodiment 20

[0138] Example 2 is basically the same as Example 15, except that both the first inclined surface and the second inclined surface are provided with magnetic attraction, so that the first inclined surface and the second inclined surface are always in contact with each other, ensuring that the first external block and the second external block move basically synchronously, so that the telescopic arm can be extended and retracted relative to the installation position in the working position and the non-working position of the telescopic arm and can be firmly stayed.

[0139] Embodiment 21

[0140] Embodiment 21 is basically the same as Embodiment 19, except that the mounting position 74 described in Embodiment 19 is installed on the door panel, while the mounting position described in this embodiment is installed inside the door panel, so that only the telescopic sleeve and the telescopic arm are exposed outside the door panel.

[0141] Embodiment 22

[0142] Example 22 is basically the same as Example 19, except that the mounting position described in this example is a split structure, including a base fixed on the door panel and a mounting position body detachably connected to the base. When the door lifter described in this example is not needed, the mounting position body can be removed from the base and temporarily installed when needed, so that the door lifter described in this example does not occupy space when not in use.

[0143] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A door lifter, acting on a door lock handle, characterized in that The door lifter includes a telescopic arm and a mounting position connected to the door. The telescopic arm is telescopic as a whole relative to the mounting position, so that the telescopic arm can move between a working position close to the door lock handle and a non-working position close to the mounting position, and prevents the telescopic arm from additionally increasing the occupied area of ​​the door lifter on the door when moving between the working position and the non-working position. The telescopic arm is provided with a resisting area which resists the door lock handle to prevent the door lock handle from rotating when the telescopic arm is in the working position.

2. A door lifter according to claim 1, characterized in that The door-lifting device also includes a sliding mechanism connecting the mounting position and the telescopic arm, the sliding mechanism includes a piston, a sliding cavity for sliding the piston, and a spring connecting the piston and the sliding cavity, the sliding cavity is provided with a blocking position for blocking the piston from sliding relative to the sliding cavity in the direction of the spring elastic force, a clamping position for clamping the piston is provided between the sliding cavity and the piston, the clamping position includes a clamping groove and a clamping pin inserted into the clamping groove, when the telescopic arm is extended and retracted between the working position and the non-working position, the piston moves between the clamping position and the blocking position, and the piston is a block structure or a cavity structure with an opening toward the bottom of the sliding cavity and at least partially covered by the sliding cavity.

3. A door lifter according to claim 2, characterized in that A slide track is also provided between the sliding cavity and the piston for the latch pin to slide and limit the sliding path of the latch pin, the slide track is connected to the slot, and the slide track is parallel to the sliding direction of the piston relative to the sliding cavity; or; The door lifter also includes a telescopic sleeve with two ends fixedly connected to the telescopic arm and the mounting position respectively, the telescopic sleeve includes a first sub-sleeve and a second sub-sleeve, when the telescopic arm is extended and retracted between the working position and the non-working position, the first sub-sleeve at least covers a portion of the second sub-sleeve; a first guide mechanism is provided between at least a portion of the first sub-sleeve and a portion of the second sub-sleeve corresponding to the first sub-sleeve covering the second sub-sleeve, the first guide mechanism includes a first guide groove and a first guide protrusion matching the first guide groove, when the piston slides in the sliding cavity, the first guide protrusion slides in the first guide groove; or; A second guide mechanism is provided between the piston and the sliding cavity. The second guide mechanism comprises a second guide groove and a second guide protrusion matching the second guide groove. When the piston slides in the sliding cavity, the second guide protrusion slides in the second guide groove.

4. A door lifter according to claim 3, characterized in that At least part of the piston is in the shape of a polygonal column that is more than a triangular column.

5. A door lifter according to claim 3, characterized in that At least part of the second sub-set is a polygonal column that is larger than a triangular column.

6. A door lifter according to claim 2, characterized in that The sliding cavity is provided with a first buffer magnet, and the piston is provided with a second buffer magnet. The interaction force between the first buffer magnet and the second buffer magnet is opposite to the elastic force of the spring, and the impact force of the buffer piston moving in the direction of the blocking position.

7. A door lifter according to claim 2, characterized in that A spring or a spring for pushing the latch pin into the latch slot is also provided between the sliding cavity and the piston.

8. A door lifter according to claim 2 or 3 or 4 or 5 or 6 or 7, characterized in that The slot opening of the card slot is in a smooth transition to a portion of the path where the card pin slides into the slot; or; the side wall surface of the card slot is an inclined surface or an arc surface; or; the insertion surface of the card pin into the card slot is an arc surface.

9. A door lifter according to claim 2 or 3 or 4 or 5 or 6 or 7, characterized in that A push block and an elastic member connected to the push block are also provided between the sliding cavity and the piston. One end of the push block is an ejection end for ejecting the bayonet pin from the slot, and the other end is a force-bearing end that receives external force so that the ejection end ejects the bayonet pin from the slot. The elastic member is a spring or a spring sheet. The elastic member resists the external force from the force-bearing end through the push block. The force-bearing end is exposed on the outer surface of the door ejector or protrudes relative to the outer surface of the door ejector.

10. A door lifter according to claim 9, characterized in that The ejector block includes a first block and a second block, the first block includes an ejection end, the second block includes a force-bearing end, the elastic member is connected to the first block, the second block presses against the first block through an inclined surface, and when the second block pushes the first block, the first block slides along the inclined surface and ejects the latch from the slot through the ejection end.

11. A door lifter according to claim 2, characterized in that The piston is cylindrical, and a sliding track is provided between the sliding cavity and the piston for the latch pin to slide and communicate with the latch slot; The sliding track is a spiral track surrounding the piston; or; The sliding track comprises a spiral track surrounding the piston and a straight track parallel to the expansion and contraction direction of the piston relative to the sliding chamber, and the straight track is connected to the spiral track.

12. The door lifter according to claim 1, characterized in that The door lifter also includes a sliding mechanism connecting the mounting position and the telescopic arm, the sliding mechanism includes a piston and a sliding cavity for the piston to slide, the piston is a block structure or a cavity structure with an opening toward the bottom of the sliding cavity and at least partially covered by the sliding cavity, the piston is cylindrical, and a bayonet and a sliding track for the bayonet to slide are provided between the sliding cavity and the piston; The sliding track is a spiral track surrounding the piston; or; The sliding track includes a spiral track surrounding the piston and a straight track parallel to the expansion and contraction direction of the piston relative to the sliding chamber, and the straight track is connected to the spiral track; When the telescopic arm is extended and retracted between the working position and the non-working position, the latch slides between the starting point and the end point of the slide track.

13. A door lifter according to claim 12, characterized in that The door lifter also includes a first magnetic attraction and a second magnetic attraction; The interaction force between the first magnetic attraction and the second magnetic attraction causes the latch to slide from one end of the straight track to the other end of the straight track; or; The sliding mechanism also includes a spring connecting the piston and the sliding chamber, and the elastic force of the spring causes the bayonet to slide from one end of the straight track to the other end of the straight track.

14. A door lifter according to claim 11, 12 or 13, characterized in that The spiral track is a circular arc track surrounding the piston.

15. The door lifter according to claim 1, characterized in that The door lifter also includes a telescopic mechanism connecting the mounting position and the telescopic arm, the telescopic mechanism includes a first external block, a second external block and a sliding channel located between the first external block and the second external block, the second external block is connected to the mounting position or the telescopic arm through a spring, one end of the sliding channel is provided with an opening for the first external block to slide into the sliding channel, and the other end is provided with a resisting groove that abuts against the second external block to prevent the second external block from entering the sliding channel, the resisting groove includes deep grooves and shallow grooves adjacent to each other, the second external block is provided with a convex head abutted by the resisting groove, and the first external block is provided with a protrusion. The block is provided with a pushing head for pushing the convex head out of the resisting groove, the pushing head is provided with a first inclined surface for resisting the convex head, and the convex head is provided with a second inclined surface matching the first inclined surface, and the length of the first inclined surface is greater than the length of the second inclined surface. When the pushing head pushes the convex head out of the resisting groove, the second inclined surface slides along the first inclined surface under the push of the spring force, driving the convex head to rotate along the first inclined surface to the opening position of the resisting groove adjacent to the resisting groove and insert it. When the telescopic arm is extended and retracted between the working position and the non-working position, the convex head switches between inserting into the shallow groove and inserting into the deep groove.

16. A door lifter according to claim 15, characterized in that The opening end of the retaining groove is provided with a transition slope connected to the bottom of the retaining groove, and the transition slope matches the second slope.

17. The door lifter according to claim 15, characterized in that A sliding head and a sliding groove for sliding the sliding head are provided between the first external block and the sliding channel; or; The door lifter also includes a telescopic sleeve with two ends respectively fixedly connected to the telescopic arm and the mounting position, the telescopic sleeve includes a first sub-sleeve and a second sub-sleeve, and when the telescopic arm is extended between the working position and the non-working position, the first sub-sleeve at least covers a portion of the second sub-sleeve; A first guide mechanism is provided at least between a portion of the first sub-sleeve and a portion of the second sub-sleeve corresponding to the portion where the first sub-sleeve covers the second sub-sleeve. The first guide mechanism includes a first guide groove and a first guide protrusion matching the first guide groove. When the first external block slides in the sliding channel, the first guide protrusion slides in the first guide groove.

18. A door lifter according to claim 17, characterized in that The portion of the first external block sliding in the sliding channel is at least a polygonal column with a triangular column shape or more.

19. The door lifter according to claim 17, characterized in that At least part of the second sub-set is a polygonal column that is larger than a triangular column.

20. The door lifter according to claim 15, characterized in that The first external block and the second external block are magnetically attracted to each other; or; The telescopic arm and the mounting position are magnetically attracted to each other; or; The first inclined surface and the second inclined surface are magnetically attracted to each other, so that the first inclined surface and the second inclined surface are always in contact with each other.

21. A door lifter according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 11 or 12 or 13 or 15 or 16 or 17 or 18 or 19 or 20, characterized in that The resisting area is located at the top or side of the telescopic arm. The resisting area is a cavity structure and is provided with an opening for inserting the door lock handle and a resisting surface for resisting the door lock handle. When the telescopic arm is in the working position, the door lock handle enters the resisting area.

22. A door lifter according to claim 21, characterized in that The resisting area is located at the top end of the telescopic arm, and the resisting area is provided with a blocking surface for preventing the telescopic arm from further moving toward the door lock handle when the telescopic arm is in the working position.

23. A door lifter according to claim 22, characterized in that The blocking surface is made of an elastic material or an elastic surface made of an elastic material is laid on the blocking surface; or; the resisting surface is made of an elastic material or an elastic surface made of an elastic material is laid on the blocking surface.

24. A door lifter according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 11 or 12 or 13 or 15 or 16 or 17 or 18 or 19 or 20, characterized in that The resisting area is located on a side of the telescopic arm facing the rotation direction of the door lock handle, and the resisting area is a resisting surface that resists the door lock handle.

25. A door lifter according to claim 24, characterized in that The abutting surface is made of an elastic material or an elastic surface made of an elastic material is laid on the abutting surface.

26. A door lifter according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 11 or 12 or 13 or 15 or 16 or 17 or 18 or 19 or 20, characterized in that The installation position is arranged inside the door or on the door panel.

27. A door lifter according to claim 26, characterized in that The installation position is a split structure, including a base fixed on the door panel and a installation position body detachably connected to the base.

Images