Corrector for parallel arrangement wire box

Abstract

The utility model discloses a row wire box corrector, belongs to the technical field of building decoration tools, and is mainly used for solving the technical problem that the consistent spacing and surface flatness are difficult to guarantee when a plurality of wire boxes are installed. The corrector comprises an L-shaped base, a rectangular track is arranged on the side wall of the L-shaped base in a penetrating mode, through holes are formed in the two sides of the track in the length direction, and spring bolts are arranged in the two through holes in a penetrating mode. A plurality of wire boxes are detachably fixed to the outer side of the L-shaped base through a plurality of fastening bolts, the fastening bolts vertically penetrate through the track and slide in the length direction of the track, and flexible adjustment of the distance between the wire boxes is achieved. A graduated scale is adhered to the surface of one side, in the width direction of the track, of the L-shaped base and used for accurately indicating the distance. According to the device, rapid positioning and spacing adjustment of the wire boxes are achieved through sliding fit of the rails and the fastening bolts, the installation precision is ensured by combining the calibrated scale, the efficiency and uniformity of parallel installation of the multiple wire boxes are remarkably improved, and the device is suitable for batch correction construction of switch socket pre-embedded boxes.

Description

Technical Field

[0001] This utility model relates to the field of building decoration tools. More specifically, this utility model relates to a junction box caliper. Background Technology

[0002] In building electrical construction, the installation accuracy of pre-embedded junction boxes (such as switch boxes and socket boxes) directly affects the flatness of the subsequent decorative surface and the quality of equipment assembly. Traditional installation methods have significant technical bottlenecks: during construction, the position of each junction box must be measured with a tape measure, manually positioned, and then fixed with temporary supports. This process is time-consuming and labor-intensive, and cumulative errors can easily lead to uneven spacing of the entire row of junction boxes, making it difficult to match standard decorative panels later. At the same time, due to the lack of a unified benchmark, it is difficult to accurately control the fixed distance (height above the wall) that the junction box needs to maintain from the finished wall surface. Independent leveling of each junction box can easily cause overall tilting or uneven depth, ultimately affecting the verticality and fit of the switch and socket installation. In addition, existing methods rely on the experience of construction workers for visual calibration, lacking quantitative adjustment tools, resulting in low installation efficiency and poor quality stability. The above-mentioned problems of insufficient spacing accuracy, lack of height consistency, and inefficient operation have become key pain points restricting the quality of industrialized decoration, and there is an urgent need to develop an integrated, quantifiable, and high-precision installation auxiliary tool. Utility Model Content

[0003] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0004] Another objective of this invention is to provide a parallel junction box calibrator that can effectively improve the efficiency and neatness of parallel installation of multiple junction boxes.

[0005] In order to achieve these objectives and other advantages of the present invention, a junction box calibrator is provided, including an L-shaped base with a rectangular track extending through one side wall. The L-shaped base has through holes on both sides along the length of the track, and spring bolts are fitted into both through holes.

[0006] The L-shaped base has multiple wire boxes that are detachably fixed to its outer side by multiple fastening bolts. The multiple fastening bolts pass vertically through the track and slide along the length of the track to adjust the spacing between the wire boxes. A scale is attached to the surface of the L-shaped base on one side of the track in the width direction.

[0007] Preferably, the spring bolt comprises:

[0008] A bolt rod with external threads on its sidewall, one end of which is fitted with a nut, and the other end is integrally formed with a limiting piece with a diameter larger than that of the through hole;

[0009] A compression spring is sleeved around the outer periphery of a bolt rod. The natural length of the compression spring is greater than the length of the bolt rod, and both ends of the compression spring are fixedly connected to a limiting plate and an L-shaped base, respectively.

[0010] The bolt rod moves through the through hole, and the compression spring and the limiting piece are located on the outside of the L-shaped base, while the nut is located on the inside of the L-shaped base.

[0011] Preferably, the curved sidewall of the bolt rod is engraved with centimeter-level height scale lines along the axial direction, and the scale spacing is equal to the thread lead P. The sidewall of the nut is provided with a rectangular observation window, and the window edge is engraved with a baseline.

[0012] Preferably, the outer end face of the nut is engraved with a scale indicator, which is etched with millimeter-level height values ​​according to the formula ΔH=θ / 360°×P, and the curved sidewall of the bolt shank is engraved with a 0-degree calibration line along the axial direction; wherein, the 0-degree scale line of the bolt shank and the ΔH=0.00 mm scale of the indicator correspond to the alignment position of the top of the nut and the top of the bolt shank, and θ in the formula is the rotation angle of the nut.

[0013] Preferably, the outer end face of the limiting piece is coated with a rubber buffer layer.

[0014] Preferably, the distance between the two through holes and the corresponding end face of the L-shaped base is 8~12 mm.

[0015] Preferably, the width of the track is 4-6 mm, the diameter of the screws of the multiple fastening bolts is smaller than the width of the track, and the diameter of the head of the fastening bolts is larger than the width of the track.

[0016] Preferably, the diameter of the through hole is 4-6 mm, and the diameter of the bolt shank of the spring bolt is smaller than the diameter of the through hole.

[0017] This utility model offers at least the following advantages: The junction box calibrator described in this utility model achieves a breakthrough in the quality and efficiency of junction box installation through integrated design: Firstly, based on a pre-assembled sliding mechanism and a visual scale system, construction personnel can quickly and steplessly adjust and precisely lock the junction box spacing, completely eliminating the cumulative errors of traditional manual measurement and ensuring that the spacing of the entire row of junction boxes is uniformly matched to the standard panel; Secondly, it innovatively adopts an overall height micro-adjustment mechanism, which automatically compensates for uneven wall surfaces with the self-adaptive physical characteristics of springs, and controls the adjustment accuracy through quantitative scale control, ensuring that the depth of all junction boxes protruding from the wall reaches millimeter-level consistency, fundamentally avoiding the risk of panel warping caused by uneven depths; Thirdly, the modular tooling supports the reuse of core components after the junction boxes are fixed and packaged, significantly reducing tool wear and tear costs. This solution also simplifies the operation process, integrating discrete multi-tool operations into a standardized "one-install, one-adjust, one-disassemble" action, effectively improving installation efficiency and significantly reducing reliance on the experience of construction personnel, providing high-precision and high-reliability technical support for prefabricated decoration.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the junction box calibrator according to one of the technical solutions of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the spring bolt in one of the technical solutions of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] like Figure 1-2 As shown, this utility model provides a junction box calibrator, including an L-shaped base 100, with a rectangular track 101 extending through one side wall. The L-shaped base 100 has through holes on both sides of the track 101 along its length, and spring bolts 200 are fitted into both through holes.

[0024] The L-shaped base 100 has multiple wire boxes 300 detachably fixed to its outer side by multiple fastening bolts 102. The multiple fastening bolts 102 pass vertically through the track 101 and slide along the length of the track 101 to adjust the spacing of the wire boxes 300. A scale 103 is adhered to one side surface of the L-shaped base 100 in the width direction of the track 101.

[0025] In the above technical solution, the L-shaped base 100 can be made of angle steel or aluminum alloy, with a through rectangular track 101 on its vertical sidewall. Symmetrical through holes are machined on both sides of the track 101 along its length, with the through holes located near the ends of the base but at an appropriate distance to maintain structural strength. A plastic scale 103 is bonded to the horizontal bottom surface of the base, with the zero point of the scale 103 aligned with the center line of the track 101. The width of the track 101 and the diameter of the through holes maintain a coordinated proportion to ensure the stability of subsequent component fit. A spring bolt 200 assembly is installed inside the through hole. The bolt shank is a standard stainless steel threaded component, with a limiting plate at one end and a nut screwed onto the other. A compression spring is sleeved on the outside of the bolt shank, with the spring's natural length greater than the bolt shank's length, and both ends are fixed to the limiting plate and the outer surface of the base, respectively. The fastening bolt 102 is an engineering plastic bolt with a head diameter greater than the width of the track 101, and a shank diameter smaller than the width of the track 101. During assembly, the nut side of the spring bolt 200 is placed inside the base, and the limiting piece faces outward; the fastening bolt 102 passes vertically through the track 101 and connects to the junction box 300.

[0026] During operation, multiple junction boxes 300 are assembled and suspended from the track 101 using fastening bolts 102, allowing for free sliding and spacing adjustment along their length. The assembled junction boxes 300 are then fixed to the wall along with the L-shaped base 100. The height of the junction boxes 300 protruding from the wall is fixed by adjusting the spring bolts 200 on both sides, thus securing the multiple junction boxes 300 within the wall. Subsequently, the fastening bolts 102 are removed by rotation, and the L-shaped base 100 is removed from the wall for subsequent reuse. The clearance fit between the track 101 and the bolts is tested for sliding friction, and the resistance value meets the standard for manual operation load. The positioning accuracy of the scale 103 is verified through repeated positioning experiments, and the error value meets the requirements of electrical installation specifications.

[0027] This technical solution achieves integrated positioning of multiple junction boxes 300 during construction through the synergistic effect of the L-shaped base 100's track 101 structure, the through-hole assembled spring bolts 200, and the sliding fastening bolts 102. During operation, the junction boxes 300 are suspended from the track 101 by the fastening bolts 102 and slide freely. The spacing is visually controlled using an adhesive ruler 103, eliminating the redundancy of traditional individual measurement. The distance between the L-shaped base 100 and the wall is adjusted by synchronously rotating the spring bolts 200 on both sides, achieving uniform control of the wall-mounted height of all junction boxes 300 and ensuring coplanarity of the end faces. After the junction boxes 300 are fixedly encapsulated, the base can be completely removed and reused by loosening the fastening bolts 102. This solution structurally solves the technical defects of asynchronous height adjustment and non-reusable positioning tools, meeting the electrical installation specifications' requirements for the positional accuracy of the junction boxes 300.

[0028] In another technical solution, the spring bolt 200 includes:

[0029] The bolt rod 201 has external threads on its side wall. One end of the bolt rod 201 is screwed with a nut 202, and the other end is integrally formed with a limiting piece 203 with a diameter larger than the through hole diameter.

[0030] A compression spring 204 is sleeved on the outer periphery of the bolt rod 201. The natural length of the compression spring 204 is greater than the length of the bolt rod 201, and the two ends of the compression spring 204 are respectively fixed to the limiting piece 203 and the L-shaped base 100.

[0031] The bolt rod 201 moves through the through hole, and the compression spring 204 and the limiting piece 203 are located on the outside of the L-shaped base 100, while the nut 202 is located on the inside of the L-shaped base 100.

[0032] In this technical solution, the spring bolt 200 consists of a threaded rod, a limiting plate 203, and a compression spring 204. One end of the threaded rod is machined into a limiting plate 203 structure, the diameter of which is designed to be larger than the diameter of the through hole in the base, and its outer surface has a composite elastic buffer layer; the other end of the threaded rod is screwed with a standard nut 202. The compression spring 204 is sleeved on the outer circumference of the threaded rod, the free length of the spring is greater than the total length of the threaded rod, and its two ends are fixedly connected to the inner surface of the limiting plate 203 and the outer surface of the base, respectively. During assembly, the threaded rod passes through the through hole in the base, so that the limiting plate 203 and the compression spring 204 are located on the outside of the base, and the nut 202 is located on the inside of the base. When the nut 202 is tightened, the base is pulled towards the wall. During assembly, the bolt rod 201 moves through the through hole in the side wall of the L-shaped base 100, so that the compression spring 204 and the limiting plate 203 are located on the outside of the base, and the nut 202 is located on the inside of the base. The compression spring 204 is fixed at both ends to the inner end face of the limiting plate 203 and the outer wall surface of the base, respectively. The buffer layer of the limiting plate 203 faces the wall installation direction, and the baseline of the observation window of the nut 202 is aligned with the scale line of the bolt rod 201. When adjusting the height, rotating the inner nut 202 of the base pushes the base to move axially relative to the bolt rod 201. Coarse adjustment is achieved by reading the scale of the bolt rod 201 through the observation window, and millimeter-level fine adjustment is achieved by rotating the nut 202. The compression spring 204 undergoes adaptive deformation under compression to compensate for local unevenness of the wall surface; the buffer layer of the limiting plate 203 avoids hard contact that could damage the wall surface. After adjustment, the spring continuously provides preload to maintain the positioning stability of the base. The spring bolt 200 assembly achieves multiple functional optimizations through an integrated mechanical structure: the threaded engagement between the bolt shank 201 and the nut 202 provides precise axial displacement control, allowing the operator to quantitatively adjust the distance between the base and the wall by rotating the nut 202, thereby accurately setting the height of the junction box 300 protruding from the wall; the assembly also simplifies the operation process, with height adjustment and wall protection functions achieved through a single component, ensuring construction accuracy while reducing reliance on auxiliary tools.

[0033] In another technical solution, the curved sidewall of the bolt rod 201 is engraved with centimeter-level height scale lines 205 along the axial direction, and the scale spacing is equal to the thread lead P. The sidewall of the nut 202 is provided with a rectangular observation window 206, and the window edge is engraved with a baseline 207.

[0034] In this technical solution, the curved surface of the bolt shank 201 is etched with continuous graduation lines along the axial direction, with the graduation interval equal to the thread lead. A rectangular observation window 206 is provided on the side wall of the nut 202, with a transverse reference line 207 engraved around the window edge. The bolt shank 201 is made of stainless steel and machined, with the graduation lines permanently marked using laser etching. The observation window area of ​​the nut 202 can be made transparent and magnified; it is made of injection-molded engineering plastic to ensure the visibility of the graduation lines. During assembly, the nut 202 is screwed onto the bolt shank 201, and the reference line 207 of the observation window remains parallel and aligned with the graduation lines of the bolt shank 201. When the nut 202 is rotated to adjust the height, the reference line 207 shifts relative to the graduation lines of the bolt shank 201. Since the graduation interval is equal to the thread lead, each graduation interval crossed by the reference line 207 corresponds to an axial movement of one lead distance in the bolt shank 201. The operator reads the graduation value indicated by the reference line 207 through the observation window to directly obtain the height change. The etching depth of the graduation lines is controlled at the micrometer level to prevent dust accumulation from affecting reading accuracy. The linear relationship between the rotation angle and height change of nut 202 is achieved through lead geometry constraints. The rust-proof treatment of the graduation lines on bolt shank 201 uses an electroplated chrome layer to ensure the durability of the markings in humid environments. The transparent material of the observation window is resistant to solvent wiping, making it suitable for oily environments at construction sites.

[0035] In another technical solution, the outer end face of the nut 202 is engraved with a scale indicator 208, which is etched with millimeter-level height values ​​according to the formula ΔH=θ / 360°×P, and the curved sidewall of the bolt shank 201 is engraved with a 0-degree calibration line 209 along the axial direction; wherein, the 0-degree scale line of the bolt shank and the ΔH=0.00 mm scale of the indicator 202 correspond to the alignment position of the top of the nut 202 and the top of the bolt shank 201, and θ in the formula is the rotation angle of the nut 202.

[0036] In this technical solution, the curved surface of the bolt rod 201 is axially engraved with centimeter-level height scale lines 205. The zero position is defined as the reference position when the inner surface of the limiting piece 203 contacts the outer surface of the base. The outer end face of the nut 202 is engraved with a scale indicator disc 208, and the disc surface is etched with an annular height compensation value scale ring. The scale value is calculated and marked according to the formula ΔH=θ / 360°×P. In use, the actual wall-mounted height is obtained by superimposing the two scales.

[0037] Foundation height reading: Observe the scale line reading on bolt rod 201 (e.g., 1.2 cm), which indicates the initial displacement of the inner surface of the limiting piece 203 relative to the outer surface of the base;

[0038] ΔH reading: Read the ΔH value directly from the indicator dial (e.g., 0.35 mm);

[0039] Height calculation: Actual height H = Bolt rod scale value + ΔH.

[0040] During operation, the bolt rod scale provides a centimeter-level reference, and the indicator dial ΔH enables millimeter-level fine-tuning compensation.

[0041] During assembly, the dual-scale zero position is simultaneously calibrated: when the top of the nut 202 is aligned with the top of the bolt rod 201, the 0 mark of the centimeter-level height scale line 205 is aligned with the baseline 207, and the 0° mark of the scale indicator 208 is aligned with the 0-degree calibration line 209 (θ=0°).

[0042] Verification with standard gauge blocks shows that the height measurement error after superimposing the two scales is controlled within ±0.05 mm (P≤1mm lead condition).

[0043] In another technical solution, the outer end face of the limiting piece 203 is composited with a rubber buffer layer. In this technical solution, the rubber buffer layer is composited with the outer end face of the limiting piece 203, forming a flexible interface when the spring bolt 200 contacts the wall surface. Through elastic deformation, it absorbs the localized concentrated stress on the wall surface by the limiting piece 203, avoiding indentation cracks on the concrete or tile surface and reducing the need for repairs. The friction coefficient between the rubber material and the wall surface is significantly higher than that of the metal contact surface, preventing the base from shifting due to construction vibration, ensuring the stability of height adjustment operations, and solving the technical defects of traditional metal limiting pieces 203 that are prone to damaging the finish and slipping upon contact, thus improving the applicability of the tool in refined construction scenarios.

[0044] In another technical solution, the two through holes are distributed at a distance of 8-12 mm from the corresponding end face of the L-shaped base 100. In this solution, this size range ensures a reasonable distance between the through holes and the base end face: when the spring bolt 200 is subjected to clamping force, a material thickness of 8 mm or more can effectively disperse stress concentration, preventing plastic deformation or cracking in the base edge area due to excessive local load; at the same time, the limitation of no more than 12 mm avoids excessive occupation of the effective length of the base, ensuring sufficient space in the track 101 area for arranging multiple junction boxes 300. This design balances structural strength and space utilization.

[0045] In another technical solution, the width of the track 101 is 4-6 mm, and the diameter of the screws of the multiple fastening bolts 102 is smaller than the width of the track 101, while the head diameter of the fastening bolts 102 is larger than the width of the track 101. In this technical solution, the width limitation of the track 101 and the size of the fastening bolts 102 work synergistically: the screw diameter smaller than the width of the track 101 (e.g., 3.5-4 mm screw with a 5 mm track 101) minimizes the sliding resistance of the bolts within the track 101, enabling smooth and stepless adjustment of the junction box 300; the bolt head diameter larger than the width of the track 101 (standard ≥ 7 mm) constitutes a physical limit, preventing the bolts from being completely embedded in the track 101, which would make disassembly difficult. This fit ensures both adjustment flexibility and the reliability of temporary fixing.

[0046] In another technical solution, the diameter of the through hole is 4-6 mm, and the diameter of the bolt shank 201 of the spring bolt 200 is smaller than the diameter of the through hole. In this technical solution, the diameter of the through hole is larger than the diameter of the spring bolt 200 (e.g., a 4.5 mm hole diameter with a 4 mm bolt diameter) to form a radial clearance: allowing the bolt shank 201 to produce a slight wobble (approximately ±1°) within the through hole. When there is local unevenness on the wall surface, the bolt shank 201 can adaptively tilt to avoid jamming; at the same time, the clearance reduces the frictional resistance of the shank wall, allowing the compression spring 204 to freely extend and retract to transmit uniform clamping force. This design improves the smoothness of the height adjustment process and the adaptability to the wall surface.

[0047] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0048] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A junction box calibrator, characterized in that, It includes an L-shaped base with a rectangular track extending through one side wall. The L-shaped base has through holes on both sides along the length of the track, and spring bolts are fitted into both through holes. The L-shaped base has multiple wire boxes that are detachably fixed to its outer side by multiple fastening bolts. The multiple fastening bolts pass vertically through the track and slide along the length of the track to adjust the spacing between the wire boxes. A scale is attached to the surface of the L-shaped base on one side of the track in the width direction.

2. The junction box calibrator as described in claim 1, characterized in that, The spring bolt includes: A bolt rod with external threads on its sidewall, one end of which is fitted with a nut, and the other end is integrally formed with a limiting piece with a diameter larger than that of the through hole; A compression spring is sleeved around the outer periphery of a bolt rod. The natural length of the compression spring is greater than the length of the bolt rod, and both ends of the compression spring are fixedly connected to a limiting plate and an L-shaped base, respectively. The bolt rod moves through the through hole, and the compression spring and the limiting piece are located on the outside of the L-shaped base, while the nut is located on the inside of the L-shaped base.

3. The junction box calibrator as described in claim 2, characterized in that, The curved sidewall of the bolt rod is engraved with centimeter-level height scale lines along the axial direction, and the scale spacing is equal to the thread lead P. The sidewall of the nut is provided with a rectangular observation window, and the window edge is engraved with a baseline.

4. The junction box calibrator as described in claim 3, characterized in that, The outer end face of the nut is engraved with a scale indicator, which is etched with millimeter-level height values ​​according to the formula ΔH=θ / 360°×P, and the curved side wall of the bolt shank is engraved with a 0-degree calibration line along the axial direction; wherein, the 0-degree scale line of the bolt shank and the ΔH=0.00 mm scale of the indicator correspond to the alignment position of the top of the nut and the top of the bolt shank, and θ in the formula is the rotation angle of the nut.

5. The junction box calibrator as described in claim 2, characterized in that, The outer end face of the limiting piece is coated with a rubber buffer layer.

6. The junction box calibrator as described in claim 1, characterized in that, The distance between the two through holes and the corresponding end face of the L-shaped base is 8~12 mm.

7. The junction box calibrator as described in claim 1, characterized in that, The track has a width of 4-6 mm, and the diameter of the screw of the multiple fastening bolts is smaller than the width of the track, while the diameter of the head of the fastening bolt is larger than the width of the track.

8. The junction box calibrator as described in claim 1, characterized in that, The diameter of the through hole is 4~6 mm, and the diameter of the bolt shank of the spring bolt is smaller than the diameter of the through hole.

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