Telescopic mechanism and adjustable mounting tool suitable for door and window auxiliary frame

Abstract

The utility model provides a telescopic mechanism and an adjustable installation tool suitable for a door and window auxiliary frame. The telescopic mechanism comprises two first fixing side pieces, two second fixing side pieces, a telescopic outer pipe, a telescopic inner pipe and a positioning clamp. One end of the telescopic outer pipe adjustably sleeves one end of the telescopic inner pipe and is locked through the positioning clamp; the other end of the telescopic outer pipe and the other end of the telescopic inner pipe are detachably provided with a second fixing side piece through a second pressing assembly and a first pressing assembly respectively, the first fixing side piece, the first pressing assembly and the second pressing assembly all have a loosening state and a locking state, and in the loosening state, the auxiliary frame is allowed to be detached from the fixing side piece, and in the locking state, the auxiliary frame is allowed to be detached from the fixing side piece. And in the locking state, the auxiliary frame is not allowed to be detached from the fixed side piece. When the door and window auxiliary frame is installed, accurate positioning can be achieved by adjusting the sleeving position of the telescopic outer pipe and the telescopic inner pipe, the installation efficiency and the installation progress are greatly improved, the installation procedure is simplified, and universality is good.

Description

Technical Field

[0001] The utility model relates to the technical field of on-site installation of doors and windows engineering, and specifically, to a telescopic mechanism and an adjustable installation tool applicable to door and window sub-frames. Background Art

[0002] For high-quality door and window installation, especially the installation of high-quality windows, door and window sub-frames will be installed. The door and window sub-frame is also called the door and window auxiliary frame. After installing the door and window sub-frame, the main frame can be fixed and protected. The main function of the sub-frame is to guide plastering. The window plastering process can be carried out without installing the main frame. If the sub-frame is not installed, the window needs to be installed first before the plastering process can be carried out. At this time, the doors and windows are easily contaminated and deformed, thus affecting the construction quality. Therefore, installing the sub-frame can well avoid unnecessary scratches and damages before and after door and window installation and ensure the quality of doors and windows. At the same time, the sub-frame can further strengthen the firmness of the main frame.

[0003] At present, when installing door and window sub-frames, a large number of tools need to be used manually for auxiliary installation. At the same time, it is difficult to accurately position during installation, and it is easy to have inaccurate positioning, which affects the installation position of doors and windows. Therefore, it is necessary to design an installation tool to solve the above defects. Summary of the Utility Model

[0004] Aiming at the defects in the prior art, the purpose of the utility model is to provide a telescopic mechanism and an adjustable installation tool applicable to door and window sub-frames.

[0005] According to a telescopic mechanism provided by the utility model, it includes two first fixed side members, two second fixed side members, a telescopic outer tube, a telescopic inner tube, and a positioning clamp;

[0006] One end of the telescopic outer tube is adjustably sleeved on one end of the telescopic inner tube so that the total length after their connection can be adjusted, and after the total length is adjusted in place, it is locked by the positioning clamp; the other end of the telescopic outer tube and the other end of the telescopic inner tube are respectively provided with a second fixed side member and a first fixed side member detachably through a second pressing assembly and a first pressing assembly, and the second fixed side member and the first fixed side member are respectively used for assembling a grooved sub-frame and a ribbed sub-frame;

[0007] Both the first pressing assembly and the second pressing assembly have a loose state and a locked state. When in the loose state, the sub-frame is allowed to be removed from the fixed side member, and when in the locked state, the sub-frame is not allowed to be removed from the fixed side member.

[0008] Preferably, the first pressing assembly includes a first fastener and a first presser, and the second pressing assembly includes a second fastener and a second presser;

[0009] One of the second fixed side members is detachably fixed to one side of the other end of the telescopic outer tube by a second fastener, and the other second fixed side member is adjustably fixed to the other side of the other end of the telescopic outer tube by a second presser;

[0010] One of the first fixed side members is detachably fixed to one side of the other end of the telescopic inner tube by a first fastener, and the other first fixed side member is adjustably fixed to the other side of the other end of the telescopic inner tube by a first presser;

[0011] By adjusting the second presser and the first presser, the first pressing assembly and the second pressing assembly can be switched between the loosened state and the locked state.

[0012] Preferably, the second fixed side member includes a second fixed end and a hook head integrally connected. The grooved attachment frame has two grooves arranged at intervals and a flange extending from the inner end of the groove to the mouth of the groove;

[0013] The second fixed end on one of the second fixed side members is detachably fixed to one side of the other end of the telescopic outer tube by the second fastener, and the hook head on one of the second fixed side members extends into the interior of one of the grooves and cooperates with the flange corresponding to the groove;

[0014] The second fixed end on the other second fixed side member is adjustably fixed to the other side of the other end of the telescopic outer tube by the second presser, and the hook head on the other second fixed side member extends into the interior of the other groove and cooperates with the flange corresponding to the groove;

[0015] When the second presser is loosened, the other second fixed side member can move away from the telescopic outer tube, so that the hook head and the flange do not interfere. At this time, the hook head can leave the groove, so that the first pressing assembly is in the loosened state;

[0016] When the second presser is tightened, the other second fixed side member can move closer to the telescopic outer tube, so that the hook head and the flange are abutted and pressed. At this time, the hook head is not allowed to leave the groove, so that the first pressing assembly is in the locked state.

[0017] Preferably, the width of the mouth of the groove is greater than or equal to the width of the hook head, and the front end of the hook head has a slope.

[0018] Preferably, the first fixed side member includes a first fixed end and a positioning groove integrally connected. The ribbed attachment frame has two positioning bosses arranged at intervals;

[0019] The first fixed end on one of the first fixed side members is detachably fixed to one side of the other end of the telescopic inner tube through the first fastener, and the positioning boss on one side of the ribbed attachment frame extends into the positioning groove on one of the first fixed side members;

[0020] The first fixed end on the other first fixed side member is adjustably fixed to the other side of the other end of the telescopic inner tube through the first presser, and the positioning boss on the other side of the ribbed attachment frame corresponds to the positioning groove on the other first fixed side member;

[0021] When the first presser is loosened, the other first fixed side member can move away from the telescopic inner tube, so that the positioning boss on the other side of the ribbed attachment frame leaves the positioning groove on the other first fixed side member. At this time, the positioning boss and the positioning groove do not interfere, so that the second pressing assembly is in a loosened state;

[0022] When the first presser is tightened, the other first fixed side member can move closer to the telescopic inner tube, so that the positioning boss on the other side of the ribbed attachment frame enters the positioning groove on the other first fixed side member, so that the second pressing assembly is in a locked state.

[0023] Preferably, the first presser and the second presser have the same structure, including a first pull rod, a pressing block and a handle end. The handle end includes an operating end and a rotating shaft end. The operating end is used for hand operation. One end of the first pull rod sequentially passes through the pressing block and the first fixed side member to connect the telescopic inner tube; or one end of the first pull rod sequentially passes through the pressing block and the second fixed side member to connect the telescopic outer tube. The other end of the first pull rod is rotatably matched with the rotating shaft end. The axis of the rotating shaft end is eccentrically arranged, so that when the rotating shaft end is driven to rotate by the operating end, the pressing block can be pressed or loosened to realize the switching between the loosened state and the locked state.

[0024] Preferably, both the telescopic outer tube and the telescopic inner tube are square tubes.

[0025] Preferably, the handle end includes an operating end and a rotating shaft end. The operating end is used for hand operation; the positioning clamp includes a second pull rod, a pressing plate and a stopper. A positioning hole is provided on the telescopic outer tube, and a gap is provided on the telescopic inner tube. One end of the second pull rod sequentially passes through the positioning hole and the gap to connect the stopper. The other end of the second pull rod is rotatably matched with the rotating shaft end. The axis of the rotating shaft end is eccentrically arranged, so that when the rotating shaft end is driven to rotate by the operating end, the pressing plate can be pressed or loosened to realize the positioning between the telescopic outer tube and the telescopic inner tube.

[0026] Preferably, the eccentric arrangement is such that when the rotating shaft end rotates, the pressing plate is subjected to different extrusion forces, so that relative movement between the telescopic outer tube and the telescopic inner tube is not allowed when the extrusion force is the largest, and relative movement between the telescopic outer tube and the telescopic inner tube is allowed when the extrusion force is the smallest.

[0027] Preferably, it includes a telescopic outer tube, a telescopic inner tube, a positioning clamp, and two sets of the telescopic mechanisms;

[0028] One end of the telescopic outer tube is adjustably sleeved on one end of the telescopic inner tube so that the total length after their connection can be adjusted, and after the total length is adjusted in place, it is locked by the positioning clamp to form a set of telescopic units. Two sets of the telescopic units are arranged in parallel at intervals, and both ends of each telescopic unit are vertically connected to the telescopic outer tubes of the telescopic mechanisms respectively.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] With the designed adjustable installation tool of the utility model, when installing the window and door sub-frame, there is no need for manual assistance with a large number of tools. By adjusting the sleeved position of the telescopic outer tube and the telescopic inner tube, accurate positioning can be achieved, greatly improving the installation efficiency and progress, simplifying the installation procedure, and having good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes, and advantages of the utility model will become more obvious:

[0032] Figure 1 It is a cross-sectional structural schematic diagram of the telescopic mechanism in the utility model;

[0033] Figure 2 It is a structural schematic diagram of the adjustable installation tool;

[0034] Figure 3 It is a structural schematic diagram when the adjustable installation tool is installed on the window and door sub-frame;

[0035] Figure 4 It is a schematic diagram of the assembly principle of the window and door sub-frame Figure 1 ;

[0036] Figure 5 It is a schematic diagram of the assembly principle of the window and door sub-frame Figure 2 ;

[0037] Figure 6 It is a schematic diagram of the positional relationship between the rotating shaft end and the pressing plate during rotation.

[0038] As shown in the figure:

[0039] Reinforced sub-frame 1

[0040] Grooved attachment frame 2

[0041] First fixed side member 3

[0042] First fixed end 31

[0043] Handle end 4

[0044] Operating end 41

[0045] Rotating shaft end 42

[0046] Second fixed side member 5

[0047] Second fixed end 51

[0048] Hook head 52

[0049] Telescopic outer tube internal thread hole 6

[0050] First fastener 7

[0051] First presser 8

[0052] First pull rod 81

[0053] Pressing block 82

[0054] Positioning boss 9

[0055] Positioning groove 10

[0056] Flange 11

[0057] Groove 12

[0058] Second fastener 13

[0059] Second presser 14

[0060] Telescopic outer tube 15

[0061] Telescopic inner tube 16

[0062] Welding joint 17

[0063] Positioning clamp 18

[0064] Second pull rod 181

[0065] Pressure plate 182

[0066] Stopper 183 Specific implementation mode

[0067] The present utility model will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several changes and improvements can still be made. These all belong to the protection scope of the present utility model.

[0068] The present utility model provides a telescopic mechanism, as Figure 1 shown, which includes two first fixed side members 3, two second fixed side members 5, a telescopic outer tube 15, a telescopic inner tube 16, and a positioning clip 18. One end of the telescopic outer tube 15 is adjustably sleeved on one end of the telescopic inner tube 16, so that the total length after their connection can be adjusted, and can be locked by the positioning clip 18 after the total length adjustment is in place, so that the telescopic outer tube 15 and the telescopic inner tube 16 cannot slide relative to each other. In the present utility model, the telescopic outer tube 15 and the telescopic inner tube 16 adopt a sleeved structure, and by adding the positioning clip 18, the length of the telescopic outer tube 15 and the telescopic inner tube 16 can be slidably adjusted. After adjusting to the required length, it is positioned and locked by the positioning clip 18 to realize the corresponding function.

[0069] Furthermore, both the telescopic outer tube 15 and the telescopic inner tube 16 are square tubes. The other ends of the telescopic outer tube 15 and the telescopic inner tube 16 are respectively provided with the second fixed side members 5 and the first fixed side members 3 detachably through the second pressing components and the first pressing components. The second fixed side members 5 and the first fixed side members 3 are respectively used to assemble the grooved attachment frame 2 and the ribbed attachment frame 1. Among them, both the first pressing component and the second pressing component have a loosened state and a locked state. When in the loosened state, it is allowed to remove the attachment frame from the fixed side member, and when in the locked state, it is not allowed to remove the attachment frame from the fixed side member.

[0070] Specifically, the first pressing component includes a first fastener 7 and a first presser 8, and the second pressing component includes a second fastener 13 and a second presser 14. One second fixed side member 5 is detachably fixed to one side of the other end of the telescopic outer tube 15 through the second fastener 13, and the other second fixed side member 5 is adjustably fixed to the other side of the other end of the telescopic outer tube 15 through the second presser 14; one first fixed side member 3 is detachably fixed to one side of the other end of the telescopic inner tube 16 through the first fastener 7, and the other first fixed side member 3 is adjustably fixed to the other side of the other end of the telescopic inner tube 16 through the first presser 8; in practical applications, the first fastener 7 and the second fastener 13 can adopt screws, such as countersunk head screws, etc. By adjusting the second presser 14 and the first presser 8, the first pressing component and the second pressing component can be switched between the loosened state and the locked state, and the assembly and disassembly of the attachment frame and the fixed side member are realized by switching between the loosened state and the locked state.

[0071] As Figure 1 shown, the second fixed side member 5 includes a second fixed end 51 and a hook head 52 that are integrally connected. The grooved attachment frame 2 has two grooves 12 arranged at intervals and a flange 11 extending from the inner end of the groove 12 toward the mouth of the groove 12. The second fixed end 51 on one second fixed side member 5 is detachably fixed to one side of the other end of the telescopic outer tube 15 by a second fastener 13. The hook head 52 on one second fixed side member 5 extends into the interior of one groove 12 and cooperates with the flange 11 corresponding to this groove 12. The second fixed end 51 on the other second fixed side member 5 is adjustably fixed to the other side of the other end of the telescopic outer tube 15 by a second presser 14. The hook head 52 on the other second fixed side member 5 extends into the interior of the other groove 12 and cooperates with the flange 11 corresponding to this groove 12. It should be noted that the width of the mouth of the groove 12 is greater than or equal to the width of the hook head 52. The front end of the hook head 52 has a slope, and the setting of the slope makes the assembly simpler, the operation more convenient, and the assembly efficiency improved.

[0072] During specific use, when the second presser 14 is loosened, the first pressing assembly is in a released state. Driven by an external force, the other second fixed side member 5 can move away from the telescopic outer tube 15, so that the hook head 52 and the flange 11 do not interfere. At this time, the hook head 52 can leave the groove 12, and the disassembly of the attachment frame and the fixed side member can be realized. When the second presser 14 is tightened, the first pressing assembly is in a locked state. The pressure generated by the tightening action can make the other second fixed side member 5 move closer to the telescopic outer tube 15, so that the hook head 52 and the flange 11 are abutted and pressed. At this time, it is not allowed for the hook head 52 to leave the groove 12, and the attachment frame and the fixed side member are assembled together.

[0073] As Figure 1As shown, the first fixed side member 3 includes an integrally connected first fixed end 31 and a positioning groove 10. The ribbed attachment frame 1 has two spaced-apart positioning bosses 9. The first fixed end 31 on one first fixed side member 3 is detachably fixed to one side of the other end of the telescopic inner tube 16 through a first fastener 7. The positioning boss 9 on one side of the ribbed attachment frame 1 extends into the positioning groove 10 on one first fixed side member 3. The first fixed end 31 on the other first fixed side member 3 is adjustably fixed to the other side of the other end of the telescopic inner tube 16 through a first presser 8. The positioning boss 9 on the other side of the ribbed attachment frame 1 corresponds to the positioning groove 10 on the other first fixed side member 3. When the first presser 8 is loosened, the other first fixed side member 3 can move away from the telescopic inner tube 16, so that the positioning boss 9 on the other side of the ribbed attachment frame 1 leaves the positioning groove 10 on the other first fixed side member 3. At this time, the positioning boss 9 and the positioning groove 10 do not interfere, and the second pressing assembly is in a loosened state, enabling the disassembly of the attachment frame and the fixed side member. When the first presser 8 is tightened, the other first fixed side member 3 can move closer to the telescopic inner tube 16, so that the positioning boss 9 on the other side of the ribbed attachment frame 1 enters the positioning groove 10 on the other first fixed side member 3, and the second pressing assembly is in a locked state, and the attachment frame and the fixed side member are assembled together.

[0074] Specifically, the first presser 8 and the second presser 14 have the same structure, including a first pull rod 81, a pressing block 82, and a handle end 4. The handle end 4 includes an operating end 41 and a rotating shaft end 42. The operating end 41 is used for hand operation, and the rotating shaft end 42 can be forced to rotate by directly applying force with the hand holding the operating end 41. One end of the first pull rod 81 on the first presser 8 arranged on the telescopic inner tube 16 sequentially passes through the pressing block 82 and the first fixed side member 3 to connect to the telescopic inner tube 16; one end of the first pull rod 81 arranged on the telescopic outer tube 15 sequentially passes through the pressing block 82 and the second fixed side member 5 to connect to the telescopic outer tube 15. The other end of the first pull rod 81 is rotatably engaged with the rotating shaft end 42, and the axis of the rotating shaft end 42 is eccentrically arranged, as Figure 6 shown. Thus, when the rotating shaft end 42 is driven to rotate by the operating end 41, the pressing block 82 can be pressed or loosened to realize the switching between the loosened state and the locked state. It should be noted that the connection between the first pull rod 81 and the telescopic outer tube 15 can adopt thread fitting, welding, etc. When thread fitting is adopted, a telescopic outer tube internal thread hole 6 is provided on the telescopic outer tube 15.

[0075] As Figure 1As shown, the positioning clip 18 includes a second pull rod 181, a pressing plate 182, and a stop member 183. A positioning hole is provided on the telescopic outer tube 15, and the positioning hole matches the second pull rod 181. A gap is provided on the telescopic inner tube 16, and the gap extends along the length direction of the telescopic inner tube 16. The width of the gap is slightly larger than the outer diameter of the second pull rod 181, so that when the telescopic inner tube 16 extends outwards from the telescopic outer tube 15, it will not be blocked by the second pull rod 181 due to the setting of the gap. One end of the second pull rod 181 sequentially passes through the positioning hole and the gap to connect the stop member 183. The stop member 183 can be a nut or a plate-like structure. The other end of the second pull rod 181 is rotationally matched with the rotating shaft end 42. The axis of the rotating shaft end 42 is eccentrically arranged, so that when the rotating shaft end 42 is driven to rotate by the operating end 41, the telescopic outer tube 15 and the telescopic inner tube 16 can be positioned by pressing or loosening the pressing plate 182. It should be noted that, as Figure 6 shown, the eccentric arrangement makes the pressing plate 182 receive different extrusion forces when the rotating shaft end 42 rotates. As a result, relative movement between the telescopic outer tube 15 and the telescopic inner tube 16 is not allowed when the extrusion force is the largest, and relative movement between the telescopic outer tube 15 and the telescopic inner tube 16 is allowed when the extrusion force is the smallest. Finally, the overall length of the telescopic outer tube 15 and the telescopic inner tube 16 is adjusted to meet the requirements of the size of the door and window sub-frame.

[0076] The present utility model also provides an adjustable installation tool applicable to a door and window sub-frame. As Figure 2 shown, it includes a telescopic outer tube 15, a telescopic inner tube 16, a positioning clip 18, and two sets of telescopic mechanisms. One end of the telescopic outer tube 15 is adjustably sleeved on one end of the telescopic inner tube 16, so that the total length after the two are connected can be adjusted. After the total length is adjusted in place, it is locked by the positioning clip 18 to form a set of telescopic units. The two sets of telescopic units are arranged in parallel at intervals. The two ends of each telescopic unit are respectively vertically connected to the telescopic outer tube 15 of the telescopic mechanism. Preferably, the two ends of the telescopic unit are welded to the telescopic outer tube 15 to form a welded joint 17. As Figure 3 shown, it is a schematic diagram of the adjustable installation tool in the present utility model after being installed on a door and window sub-frame, making.

[0077] The present utility model uses two rectangular tubes, namely the telescopic outer tube 15 and the telescopic inner tube 16, for matching and combined use. The telescopic outer tube 15 and the telescopic inner tube 16 are connected and clamped by the positioning clip 18 to form a telescopic structural member with a certain structural strength. During the telescopic process, it can meet the variables of the sizes of various door and window sub-frames, and realize positioning of a fixed distance between paired sub-frame materials and form a special installation tool for right-angled door and window sub-frames.

[0078] The working principle of the present utility model is as follows:

[0079] As Figure 4As shown, side A and side B respectively form a combination of a ribbed attachment frame 1 and a grooved attachment frame 2 that are paired, and have the same dimensions; side C and side D respectively form a combination of a ribbed attachment frame 1 and a grooved attachment frame 2 that are paired, and have the same dimensions; the quadrilateral structure can meet the variable dimensions of various window and door attachment frames during the telescopic operation of the regular rectangular telescopic inner tube 16 and the telescopic outer tube 15, because the hook head 52 on the second fixed side member 5 and the groove 12 and the flange 11 in the grooved attachment frame 2 are highly matched to form a structural hanging part; the first fixed end 31 on the first fixed side member 3 and the positioning boss 9 on one side of the ribbed attachment frame 1 are highly matched to form a structural hanging part.

[0080] Figure 4 The variable dimensions of the telescopic operation of the regular rectangular telescopic inner tube 16 and the telescopic outer tube 15 formed therein are such that side A and side B form a combined sliding and close contact between the ribbed attachment frame 1 and the grooved attachment frame 2 at the notch Figure 4 Side C, because Figure 2 or Figure 3 is a regular rectangular structure, and the adjacent sides of the regular rectangular structure are perpendicular to each other at a 90-degree right angle.

[0081] Side A and side B form a combined sliding and equidistant close contact between the ribbed attachment frame 1 and the grooved attachment frame 2 at the notch Figure 4 Side C, it can be proved that Figure 4 In the regular rectangular structure, the two long sides and side C are parallel. Then, side A and side B form a combined sliding between the ribbed attachment frame 1 and the grooved attachment frame 2 at the notch to the required positioning position. Under the pressing and releasing actions of the first presser 8, the telescopic inner tube 16 and the ribbed attachment frame 1 are connected in a pressing and releasing working manner.

[0082] Under the pressing and releasing actions of the second presser 14, one end of the telescopic outer tube 15 and the grooved attachment frame 2 are connected in a pressing and releasing working manner. Thus, a special installation tool for window and door attachment frames with a fixed spacing and forming a right angle is realized.

[0083] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0084] The specific embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present utility model. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. A telescopic mechanism, characterized in that: It comprises two first fixed side pieces (3), two second fixed side pieces (5), a telescopic outer tube (15), a telescopic inner tube (16), and a positioning clamp (18); One end of the telescopic outer tube (15) is adjustably sleeved on one end of the telescopic inner tube (16) so that the total length of the two after being connected can be adjusted and locked by the positioning clamp (18) after the total length is adjusted to the right position; the other end of the telescopic outer tube (15) and the other end of the telescopic inner tube (16) are detachably provided with a second fixed side piece (5) and a first fixed side piece (3) through a second clamping assembly and a first clamping assembly, respectively, and the second fixed side piece (5) and the first fixed side piece (3) are used to assemble the grooved auxiliary frame (2) and the ribbed auxiliary frame (1), respectively; The first clamping assembly and the second clamping assembly both have a loosened state and a locked state. When in the loosened state, the auxiliary frame is allowed to be removed from the fixed side piece, and when in the locked state, the auxiliary frame is not allowed to be removed from the fixed side piece.

2. The telescopic mechanism according to claim 1, characterized in that: The first pressing assembly comprises a first fastener (7) and a first presser (8), and the second pressing assembly comprises a second fastener (13) and a second presser (14); One of the second fixed side pieces (5) is detachably fixed to one side of the other end of the telescopic outer tube (15) via a second fastener (13), and another of the second fixed side pieces (5) is adjustably fixed to the other side of the other end of the telescopic outer tube (15) via a second tightener (14); One of the first fixed side pieces (3) is detachably fixed to one side of the other end of the telescopic inner tube (16) via a first fastener (7), and another of the first fixed side pieces (3) is adjustably fixed to the other side of the other end of the telescopic inner tube (16) via a first tightener (8); By adjusting the second clamp (14) and the first clamp (8), the first clamp assembly and the second clamp assembly can be switched between a released state and a locked state.

3. The telescopic mechanism according to claim 2, characterized in that: The second fixed side member (5) comprises a second fixed end (51) and a hook head (52) connected in one piece, and the grooved auxiliary frame (2) comprises two grooves (12) arranged at intervals and a flange (11) extending from the inner side end of the groove (12) to the mouth of the groove (12); A second fixed end (51) on the second fixed side member (5) is detachably fixed to one side of the other end of the telescopic outer tube (15) via the second fastener (13); and a hook head (52) on the second fixed side member (5) extends into the interior of a groove (12) and cooperates with a flange (11) corresponding to the groove (12); The second fixing end (51) on the other second fixing side piece (5) is adjustably fixed to the other side of the other end of the telescopic outer tube (15) through the second pressing device (14), and the hook head (52) on the other second fixing side piece (5) extends into the interior of another groove (12) and cooperates with the flange (11) corresponding to the groove (12); When the second clamp (14) is loosened, the other second fixed side member (5) can move away from the telescopic outer tube (15) so that the hook head (52) and the flange (11) do not interfere with each other. At this time, the hook head (52) can leave the groove (12) so that the first clamping assembly is in a loosened state. When the second clamp (14) is tightened, the other second fixed side member (5) can move closer to the telescopic outer tube (15) so that the hook head (52) and the flange (11) are abutted and pressed. At this time, the hook head (52) is not allowed to leave the groove (12) so that the first clamping assembly is in a locked state.

4. The telescopic mechanism according to claim 3, characterized in that: The width of the mouth of the groove (12) is greater than or equal to the width of the hook head (52), and the front end of the hook head (52) has a slope.

5. The telescopic mechanism according to claim 2, characterized in that: The first fixed side member (3) comprises a first fixed end (31) and a positioning groove (10) which are integrally connected, and the ribbed auxiliary frame (1) comprises two positioning bosses (9) arranged at intervals; A first fixed end (31) on one of the first fixed side pieces (3) is detachably fixed to one side of the other end of the telescopic inner tube (16) via the first fastener (7), and a positioning boss (9) on one side of the ribbed auxiliary frame (1) extends into the interior of the positioning groove (10) on one of the first fixed side pieces (3); The first fixed end (31) on the other first fixed side member (3) is adjustably fixed to the other side of the other end of the telescopic inner tube (16) through the first clamp (8), and the positioning boss (9) on the other side of the ribbed auxiliary frame (1) corresponds to the positioning groove (10) on the other first fixed side member (3); When the first clamp (8) is loosened, the other first fixed side member (3) can move away from the telescopic inner tube (16), thereby causing the positioning boss (9) on the other side of the ribbed auxiliary frame (1) to leave the positioning groove (10) on the other first fixed side member (3). At this time, the positioning boss (9) and the positioning groove (10) do not interfere with each other, thereby causing the second clamping assembly to be in a loosened state; When the first clamp (8) is tightened, the other first fixed side member (3) can move closer to the telescopic inner tube (16), thereby causing the positioning boss (9) on the other side of the ribbed auxiliary frame (1) to enter the positioning groove (10) on the other first fixed side member (3), thereby causing the second clamping assembly to be in a locked state.

6. The telescopic mechanism according to claim 2, characterized in that: The first clamp (8) and the second clamp (14) both have the same structure, including a first pull rod (81), a clamping block (82) and a handle end (4). The handle end (4) includes an operating end (41) and a rotating shaft end (42). The operating end (41) is used for hand operation. One end of the first pull rod (81) sequentially passes through the clamping block (82) and the first fixed side member (3) to connect to the telescopic inner tube (16); or one end of the first pull rod (81) sequentially passes through the clamping block (82) and the second fixed side member (5) to connect to the telescopic outer tube (15). The other end of the first pull rod (81) is rotatably matched with the rotating shaft end (42). The axis of the rotating shaft end (42) is eccentrically arranged so that when the operating end (41) drives the rotating shaft end (42) to rotate, the clamping block (82) can be pressed or loosened to achieve switching between the released state and the locked state.

7. The telescopic mechanism according to claim 1, characterized in that: The telescopic outer tube (15) and the telescopic inner tube (16) are both square tubes.

8. The telescopic mechanism according to claim 6, characterized in that: The handle end (4) comprises an operating end (41) and a rotating shaft end (42), wherein the operating end (41) is used for hand operation; the positioning clamp (18) comprises a second pull rod (181), a pressure plate (182) and a stopper (183); a positioning hole is provided on the telescopic outer tube (15), and a slit is provided on the telescopic inner tube (16); one end of the second pull rod (181) passes through the positioning hole and the slit in sequence to connect to the stopper (183); the other end of the second pull rod (181) is rotatably matched with the rotating shaft end (42); the axis of the rotating shaft end (42) is eccentrically arranged so that when the rotating shaft end (42) is driven to rotate by the operating end (41), the positioning between the telescopic outer tube (15) and the telescopic inner tube (16) can be achieved by pressing or loosening the pressure plate (182).

9. The telescopic mechanism according to claim 8, characterized in that: The eccentric arrangement causes the pressing plate (182) to be subjected to different squeezing forces when the rotating shaft end (42) rotates, so that when the squeezing force is maximum, relative movement between the telescopic outer tube (15) and the telescopic inner tube (16) is not allowed, while when the squeezing force is minimum, relative movement between the telescopic outer tube (15) and the telescopic inner tube (16) is allowed.

10. An adjustable installation tool suitable for door and window frames, characterized in that: It comprises a telescopic outer tube (15), a telescopic inner tube (16), a positioning clamp (18), and two sets of telescopic mechanisms according to any one of claims 1 to 9; One end of the telescopic outer tube (15) is adjustably sleeved on one end of the telescopic inner tube (16) so that the total length of the two after being connected can be adjusted and after the total length is adjusted to the right position, they are locked by the positioning clamp (18) to form a set of telescopic units. The two sets of telescopic units are arranged in parallel and spaced apart, and the two ends of each telescopic unit are respectively vertically connected to the telescopic outer tube (15) of the telescopic mechanism.

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