Hole forming template
By using flexible connectors and an adjustable diameter ring template design, combined with an adjustable number of arc-shaped splicing units and support components, the problem of traditional hole pre-reserved templates being difficult to reuse is solved, enabling efficient construction suitable for holes of different diameters.
Patent Information
- Application Number
- CN202510933747.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-08
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2045-07-08
AI Technical Summary
Traditional methods of pre-drilling circular holes typically use templates that are only for one-time use or only applicable to specific sizes, making them difficult to reuse and affecting construction efficiency.
It adopts a flexible connector and an adjustable diameter ring template design, combined with an adjustable number of arc-shaped splicing units and support components. Multiple arc-shaped splicing units are spliced together to form a ring template, which is suitable for holes of different diameters.
It enables the reuse of hole-forming templates, improves construction efficiency and template structure stability, and is suitable for reserved holes of different diameters.
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Figure CN120443846B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of construction tools technology, and more specifically, to a hole forming template. Background Technology
[0002] In building construction, the pre-reservation of circular openings is a common and crucial step. These openings include those for pre-reserved mechanical and electrical pipelines, equipment installation, material transport, water supply and drainage, and maintenance manholes. Traditional methods for pre-reserving circular openings typically involve assembling wooden formwork on-site to form a circular structure. The formwork is then installed into the concrete structure using nailing or fixed supports, followed by concrete pouring to create the desired circular opening. However, this method typically uses formwork that is only for single use or suitable only for openings of specific sizes, making reuse difficult and impacting overall construction efficiency. Summary of the Invention
[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a hole forming template that can be applied to reserved holes of different diameters.
[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0005] This application provides a hole-forming template, comprising: a flexible connector, the flexible connector being rolled in an annular shape, and the annular diameter of the flexible connector being adjustable; a template body, comprising multiple arc-shaped splicing units, the multiple arc-shaped splicing units being arranged around the flexible connector, and each arc-shaped splicing unit being connected to the flexible connector, any two adjacent arc-shaped splicing units abutting to splice into an annular template, the number of arc-shaped splicing units being adjustable; and a support assembly, comprising a support column and multiple telescopic rods, the support column being disposed inside the annular shape of the flexible connector, the multiple telescopic rods being arranged around the support column, and one end of each telescopic rod being connected to the support column, and the other end of each telescopic rod being connected to the flexible connector.
[0006] In an optional embodiment, the hole forming template further includes fastening components, each of which is simultaneously connected to the flexible connector and one of the arc-shaped splicing units.
[0007] In an optional embodiment, the tail end of the flexible connector is at least partially overlapped on the head end of the flexible connector to form an overlapping section, and at least one of the fastening components is connected to the overlapping section.
[0008] In an optional embodiment, the fastening assembly includes a connector and a fastener, the connector being connected to both the flexible connector and one of the arc-shaped splicing units, and the fastener being connected to the connector and abutting against the side of the flexible connector away from the arc-shaped splicing unit.
[0009] In an optional embodiment, the flexible connector is provided with a plurality of first connecting grooves on the side away from the arc-shaped splicing unit. The plurality of first connecting grooves are arranged at intervals along the circumference of the flexible connector, and the number of first connecting grooves is equal to the number of telescopic rods. The support assembly also includes a first connecting rod, one end of which is connected to the end of the telescopic rod near the flexible connector, and the other end of which is engaged in a first connecting groove and can rotate omnidirectionally relative to the first connecting groove.
[0010] In an optional embodiment, the support column is provided with a connecting groove group, the connecting groove group including a plurality of second connecting grooves, the plurality of second connecting grooves being arranged at intervals along the circumference of the support column, and the number of second connecting grooves being equal to the number of telescopic rods. The support assembly also includes a second connecting rod, one end of the second connecting rod being connected to the end of the telescopic rod near the support column, and the other end of the second connecting rod being engaged in a second connecting groove and rotating omnidirectionally relative to the second connecting groove.
[0011] In an optional embodiment, there are multiple connecting groove groups, which are spaced apart along the axial direction of the support column.
[0012] In an optional embodiment, the support assembly further includes a guide sleeve, which is sleeved on the support column and located at the connecting groove group. The guide sleeve has a plurality of guide holes, each of which communicates with a second connecting groove. The end of the second connecting rod away from the telescopic rod passes through both the guide hole and the second connecting groove.
[0013] In an optional embodiment, the telescopic rod has multiple telescopic sections, which are connected in sequence, and any two adjacent telescopic sections can extend or retract relative to each other.
[0014] In an optional embodiment, the support assembly further includes a plurality of limiting pins, each of which is simultaneously inserted into any two adjacent telescopic portions of the same telescopic rod.
[0015] The hole forming template of this application has the following advantages:
[0016] In the hole-forming template of this application, multiple arc-shaped splicing units can be spliced together to form a ring template, which serves as the template for hole forming. Because the flexible connector is rolled into a ring, and multiple arc-shaped splicing units are arranged around the flexible connector, with each arc-shaped splicing unit connected to the flexible connector, the flexible connector can shape and fix the multiple arc-shaped splicing units, thus forming a stable ring template structure and improving the construction effect of the reserved holes. Furthermore, since the ring diameter of the flexible connector and the number of arc-shaped splicing units are adjustable, the hole-forming template can be adapted to reserved holes of different diameters by adjusting the ring diameter of the flexible connector and the number of arc-shaped splicing units, thereby achieving the reuse of the hole-forming template and improving construction efficiency. Furthermore, since multiple telescopic rods are arranged around the support column, with one end of the telescopic rod connected to the support column and the other end connected to the flexible connector, the flexible connector can be fixed by the support assembly to improve the stability of the annular structure of the flexible connector, thereby further improving the structural stability of the template body. At the same time, by changing the length of the telescopic rod, it can be adapted to different annular diameters of the flexible connector, thus adapting to reserved holes of different diameters. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 A top view of the hole forming template in this application is shown.
[0019] Figure 2 This paper shows a schematic diagram of the main structure of the hole forming template in this application;
[0020] Figure 3 It shows Figure 1 Enlarged structural diagram at point A;
[0021] Figure 4 It shows Figure 2 A magnified structural diagram at point B in the middle.
[0022] Explanation of key component symbols:
[0023] 100 - Flexible connector; 110 - First connecting groove;
[0024] 200 - Template body; 210 - Arc-shaped splicing unit; 211 - First sidewall; 212 - Second sidewall; 213 - Third sidewall; 214 - Fourth sidewall;
[0025] 300-Support assembly; 310-Support column; 311-Connecting groove assembly; 312-Second connecting groove; 320-Telescopic rod; 321-Telescopic part; 330-First connecting rod; 340-Second connecting rod; 350-Guide sleeve; 351-Guide hole;
[0026] 400 - Fastening assembly; 410 - Connector; 420 - Fastener. Detailed Implementation
[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0028] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] Reference Figure 1 as well as Figure 2 As shown, the hole forming template involved in the embodiments of this application includes: a flexible connector 100, a template body 200, and a support component 300.
[0033] Specifically, the flexible connector 100 is rolled in a ring shape, and the ring diameter of the flexible connector 100 is adjustable; the template body 200 includes multiple arc-shaped splicing units 210, which are arranged around the flexible connector 100, and each arc-shaped splicing unit 210 is connected to the flexible connector 100. Any two adjacent arc-shaped splicing units 210 abut against each other to form an annular template, and the number of arc-shaped splicing units 210 is adjustable; the support component 300 includes a support column 310 and multiple telescopic rods 320. The support column 310 is arranged inside the annulus of the flexible connector 100, and the multiple telescopic rods 320 are arranged around the support column 310. One end of the telescopic rod 320 is connected to the support column 310, and the other end of the telescopic rod 320 is connected to the flexible connector 100.
[0034] In the hole forming template of this application, multiple arc-shaped splicing units can be spliced together to form a ring template, which serves as the template for hole forming. Since the flexible connector 100 is rolled into a ring, multiple arc-shaped splicing units 210 are arranged around the flexible connector 100, and each arc-shaped splicing unit 210 is connected to the flexible connector 100. Thus, the flexible connector 100 can shape and fix the multiple arc-shaped splicing units 210, allowing them to form a stable ring template and improving the construction effect of the reserved holes. Furthermore, since the annular diameter of the flexible connector 100 and the number of arc-shaped splicing units 210 are adjustable, the hole forming template can be adapted to reserved holes of different diameters by adjusting the annular diameter of the flexible connector 100 and the number of arc-shaped splicing units 210, thereby achieving the reuse of the hole forming template and improving construction efficiency. Furthermore, since multiple telescopic rods 320 are arranged around the support column 310, with one end of the telescopic rod 320 connected to the support column 310 and the other end of the telescopic rod 320 connected to the flexible connector 100, the flexible connector 100 can be fixed by the support assembly 300 to improve the annular structural stability of the flexible connector 100, thereby further improving the structural stability of the template body 200. At the same time, by changing the length of the telescopic rod 320, it can be adapted to different annular diameters of the flexible connector 100, thus adapting to reserved holes of different diameters.
[0035] Reference Figure 3 As shown, the arc-shaped splicing unit 210 has a first sidewall 211, a second sidewall 212, a third sidewall 213, and a fourth sidewall 214. The first sidewall 211 and the second sidewall 212 are both arc-shaped sidewalls, and the first sidewall 211 is attached to the flexible connector 100. The second sidewalls 212 of multiple arc-shaped splicing units 210 are spliced together to form a circular structure with pre-reserved holes. The third sidewall 213 and the fourth sidewall 214 are spaced apart along the arc of the arc-shaped splicing unit 210. In any two adjacent arc-shaped splicing units 210, the third sidewall 213 of one arc-shaped splicing unit 210 is attached to the fourth sidewall 214 of the other arc-shaped splicing unit 210, so that the template body 200 forms an integral structure, improving the structural stability of the template body 200.
[0036] Specifically, in this embodiment, the arc-shaped splicing unit 210 is made of a lightweight, high-strength material with a certain structural rigidity that is easy to assemble and reuse, such as EPS (Expanded Polystyrene), XPS (Extruded Polystyrene), lightweight plastics, or composite materials, in order to reduce the weight of the arc-shaped splicing unit 210 and improve the splicing convenience of the arc-shaped splicing unit 210.
[0037] Reference Figure 1 As shown, the hole forming template also includes fastening components 400, each of which is simultaneously connected to the flexible connector 100 and an arc-shaped splicing unit 210.
[0038] In this embodiment, since each fastening component 400 is simultaneously connected to the flexible connector 100 and an arc-shaped splicing unit 210, each arc-shaped splicing unit 210 can be connected to the flexible connector 100 through multiple fastening components 400, thereby improving the connection stability between the arc-shaped splicing unit 210 and the flexible connector 100. This allows multiple arc-shaped splicing units 210 to be shaped by the flexible connector 100, so that multiple arc-shaped splicing units can be spliced together to form a stable ring template structure, improving the construction effect of the reserved holes.
[0039] Reference Figure 3 As shown, the tail end of the flexible connector 100 is at least partially overlapped on the head end of the flexible connector 100 to form an overlapping section, and at least one fastening component 400 is connected to the overlapping section.
[0040] In this embodiment, the tail end and the head end of the flexible connector 100 can be connected by at least one fastening component 400 to improve the structural stability of the flexible connector 100 rolled into a ring. At the same time, the ring diameter of the flexible connector 100 can be changed by changing the length of the overlapping section to accommodate reserved holes of different sizes.
[0041] Continue to refer to Figure 3 As shown, the fastening assembly 400 includes a connector 410 and a fastener 420. The connector 410 is connected to both the flexible connector 100 and an arc-shaped splicing unit 210. The fastener 420 is connected to the connector 410 and abuts against the side of the flexible connector 100 away from the arc-shaped splicing unit 210.
[0042] In this embodiment, since the connector 410 is connected to both the flexible connector 100 and an arc-shaped splicing unit 210, the flexible connector 100 and the arc-shaped splicing unit 210 can be connected through the connector 410. Furthermore, since the fastener 420 is connected to the connector 410 and abuts against the side of the flexible connector 100 away from the arc-shaped splicing unit 210, the connector 410 can be fastened through the fastener 420 when the connector 410 is connected to both the flexible connector 100 and the arc-shaped splicing unit 210. This improves the connection stability between the connector 410, the flexible connector 100, and the arc-shaped splicing unit 210, thereby enhancing the connection stability between the flexible connector 100 and the arc-shaped splicing unit 210.
[0043] Specifically, the connector 410 is a bolt, the fastener 420 is a nut, and the flexible connector 100 and the arc-shaped splicing unit 210 are both provided with connection holes. The bolt passes through the connection holes of both the flexible connector 100 and the arc-shaped splicing unit 210 and is fastened by the nut.
[0044] Continue to refer to Figure 3 As shown, the flexible connector 100 is provided with a plurality of first connecting grooves 110 on the side away from the arc-shaped splicing unit 210. The plurality of first connecting grooves 110 are arranged at intervals along the circumference of the flexible connector 100, and the number of first connecting grooves 110 is equal to the number of telescopic rods 320. The support assembly 300 also includes a first connecting rod 330. One end of the first connecting rod 330 is connected to the end of the telescopic rod 320 near the flexible connector 100, and the other end of the first connecting rod 330 is engaged in a first connecting groove 110 and can rotate omnidirectionally relative to the first connecting groove 110.
[0045] In this embodiment, since one end of the first connecting rod 330 is connected to the end of the telescopic rod 320 near the flexible connector 100, and the other end of the first connecting rod 330 is engaged in a first connecting groove 110, the telescopic rod 320 and the flexible connector 100 can be connected through the first connecting rod 330. At the same time, since the end of the first connecting rod 330 away from the telescopic rod 320 can rotate omnidirectionally relative to the first connecting groove 110, when the telescopic rod 320 extends or retracts, it can rotate omnidirectionally relative to the flexible connector 100, so that the telescopic rod 320 can still be connected to the flexible connector 100 and the support column 310 after extension or retraction. This allows the support assembly 300 to support flexible connectors 100 of different diameters.
[0046] Reference Figure 4As shown, the support column 310 is provided with a connecting groove group 311, which includes a plurality of second connecting grooves 312. The plurality of second connecting grooves 312 are arranged at intervals along the circumference of the support column 310, and the number of second connecting grooves 312 is equal to the number of telescopic rods 320. The support assembly 300 also includes a second connecting rod 340. One end of the second connecting rod 340 is connected to the end of the telescopic rod 320 near the support column 310, and the other end of the second connecting rod 340 is engaged in a second connecting groove 312 and can rotate omnidirectionally relative to the second connecting groove 312.
[0047] In this embodiment, since one end of the second connecting rod 340 is connected to the end of the telescopic rod 320 near the support column 310, and the other end of the second connecting rod 340 is engaged in a second connecting groove 312, the telescopic rod 320 and the support column 310 can be connected through the second connecting rod 340. At the same time, since the end of the second connecting rod 340 away from the telescopic rod 320 can rotate omnidirectionally relative to the second connecting groove 312, when the telescopic rod 320 extends or retracts, it can rotate omnidirectionally relative to the support column 310, so that the telescopic rod 320 can still be connected to the flexible connector 100 and the support column 310 after extension or retraction. This allows the support assembly 300 to support flexible connectors 100 of different diameters. Furthermore, since multiple first connecting grooves 110 are spaced apart circumferentially along the flexible connector 100, and multiple second connecting grooves 312 are spaced apart circumferentially along the support column 310, multiple telescopic rods 320 can be spaced apart circumferentially along the flexible connector 100, so that multiple telescopic rods 320 can be connected to the flexible connector 100 at different positions along its circumference, thereby improving the supporting effect on the flexible connector 100.
[0048] Continue to refer to Figure 4 As shown, there are multiple connecting groove groups 311, which are spaced apart along the axial direction of the support column 310.
[0049] In this embodiment, since multiple connecting groove groups 311 are spaced apart along the axial direction of the support column 310, the telescopic rod 320 can be connected to the second connecting groove 312 of different connecting groove groups 311, so as to adjust the connection position of the telescopic rod 320 on the support column 310 according to the actual working conditions, so that the telescopic rod 320 can support flexible connectors 100 of different diameters.
[0050] Continue to refer to Figure 4As shown, the support assembly 300 also includes a guide sleeve 350, which is sleeved on the support column 310 and located at the connecting groove group 311. The guide sleeve 350 is provided with a plurality of guide holes 351, each of which communicates with a second connecting groove 312. The end of the second connecting rod 340 away from the telescopic rod 320 passes through both the guide hole 351 and the second connecting groove 312.
[0051] Specifically, in this embodiment, the guide sleeve 350 can move along the axial direction of the support component 300 so that the guide hole 351 of the guide sleeve 350 communicates with the second connecting groove 312 of any set of connecting groove groups 311.
[0052] In this embodiment, since each guide hole 351 is connected to a second connecting groove 312, the end of the second connecting rod 340 away from the telescopic rod 320 passes through both the guide hole 351 and the second connecting groove 312. In this way, the guide sleeve 350 can guide the second connecting rod 340, so that the second connecting rod 340 can pass through the guide hole 351 into the second connecting groove 312, thereby improving the connection efficiency between the second connecting rod 340 and the support column 310, and at the same time improving the connection stability between the second connecting rod 340 and the support column 310.
[0053] Reference Figure 1 as well as Figure 3 As shown, the telescopic rod 320 has multiple telescopic parts 321, which are connected in sequence, and any two adjacent telescopic parts 321 can extend or retract relative to each other.
[0054] In this embodiment, since multiple telescopic parts 321 are connected in sequence, and any two adjacent telescopic parts 321 can extend and retract with each other, the telescopic length of the telescopic rod 320 can be increased, so that the telescopic rod 320 can extend and retract within a larger length range, thereby enabling the telescopic rod 320 to support flexible connectors 100 of different diameters.
[0055] Specifically, the support assembly 300 also includes multiple limiting pins, each of which is simultaneously inserted into any two adjacent telescopic parts 321 of the same telescopic rod 320.
[0056] In this embodiment, since each limiting pin is simultaneously inserted into any two adjacent telescopic parts 321 of the same telescopic rod 320, when the telescopic rod 320 is extended to a preset length, the adjacent telescopic parts 321 can be fixed by the limiting pin, so that the telescopic rod 320 can be kept at the preset length, thereby allowing the telescopic rod 320 to be fixed at any length, thereby further improving the applicability of the telescopic rod 320.
[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0058] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A hole-forming template, characterized in that, include: A flexible connector, wherein the flexible connector is rolled in a ring shape and the ring diameter of the flexible connector is adjustable; The template body includes multiple arc-shaped splicing units, which are arranged around the flexible connector. Each arc-shaped splicing unit is connected to the flexible connector. Any two adjacent arc-shaped splicing units abut against each other to form a ring template. The number of arc-shaped splicing units is adjustable. A support assembly includes a support column and a plurality of telescopic rods. The support column is disposed inside the annular space of the flexible connector, and the plurality of telescopic rods are arranged around the support column. One end of each telescopic rod is connected to the support column, and the other end of each telescopic rod is connected to the flexible connector. The flexible connector is provided with a plurality of first connecting slots on the side away from the arc-shaped splicing unit. The plurality of first connecting slots are arranged at intervals along the circumference of the flexible connector, and the number of first connecting slots is equal to the number of telescopic rods. The support assembly also includes a first connecting rod. One end of the first connecting rod is connected to the end of the telescopic rod near the flexible connector, and the other end of the first connecting rod is engaged in a first connecting slot and can rotate omnidirectionally relative to the first connecting slot. The support column is provided with a connecting groove group, which includes a plurality of second connecting grooves. The plurality of second connecting grooves are arranged at intervals along the circumference of the support column, and the number of second connecting grooves is equal to the number of telescopic rods. The support assembly also includes a second connecting rod. One end of the second connecting rod is connected to the end of the telescopic rod near the support column, and the other end of the second connecting rod is engaged in a second connecting groove and can rotate omnidirectionally relative to the second connecting groove. There are multiple connecting groove groups, and the multiple connecting groove groups are spaced apart along the axial direction of the support column; The support assembly also includes a guide sleeve, which is sleeved on the support column and located at the connecting groove group. The guide sleeve has multiple guide holes, each of which communicates with a second connecting groove. The end of the second connecting rod away from the telescopic rod passes through both the guide hole and the second connecting groove.
2. The hole forming template according to claim 1, characterized in that, The hole forming template also includes fastening components, each of which is simultaneously connected to the flexible connector and one of the arc-shaped splicing units.
3. The hole forming template according to claim 2, characterized in that, The tail end of the flexible connector is at least partially overlapped on the head end of the flexible connector to form an overlapping section, and at least one of the fastening components is connected to the overlapping section.
4. The hole forming template according to claim 2, characterized in that, The fastening assembly includes a connector and a fastener. The connector is connected to both the flexible connector and one of the arc-shaped splicing units. The fastener is connected to the connector and abuts against the side of the flexible connector away from the arc-shaped splicing unit.
5. The hole forming template according to claim 1, characterized in that, The telescopic rod has multiple telescopic parts, which are connected in sequence, and any two adjacent telescopic parts can extend or retract relative to each other.
6. The hole forming template according to claim 5, characterized in that, The support assembly also includes multiple limiting pins, each of which is simultaneously inserted into any two adjacent telescopic parts of the same telescopic rod.
Citation Information
Patent Citations
Hole reserving device for building construction
CN217106157U
Supporting structure in reserved hole and construction device
CN222936421U