Projector mounting tube structure

Abstract

The utility model relates to a projector mounting tube structure, which is characterized by comprising an outer sleeve and a telescopic tube sleeved in the outer sleeve, the outer sleeve is provided with a limit groove along the length direction, and the limit groove does not penetrate through the upper end and the lower end of the outer sleeve. The upper end of the telescopic pipe is provided with a first bolt hole and a first bolt in threaded connection with the first bolt hole, a bolt head of the first bolt penetrates out of the limiting groove, the lower end of the outer sleeve is provided with a plurality of through holes formed at intervals in the axial direction, and the telescopic pipe is provided with a plurality of second bolt holes formed at intervals in the axial direction. And the second bolt penetrates through one through hole and is in threaded connection with one second bolt hole. The projector mounting tube is reasonable in structural design, and is beneficial to preventing the projector from accidentally falling off when the height of the projector is adjusted.

Description

Technical Field

[0001] The utility model relates to a pipe material used on a projector, in particular to a projector mounting pipe structure. Background Art

[0002] A projector is an optical instrument that uses optical elements to magnify the outline of a workpiece and project it onto a screen. It can use transmitted light for contour measurement, and can also use reflected light to measure the surface shape of blind holes and observe the surface of parts.

[0003] The inventor of this case, Wu Huai, applied for a "retractable hanging tube for imaging equipment" on March 29, 2013, with the publication number CN302468433S. Although the hanging tube can be adjusted in length to meet usage needs, it has no safety structure. If the operator fails to hold the projector properly, the projector may easily fall from a height and be damaged.

[0004] The "Projector Positioning Device" filed by the applicant in this case on July 27, 2011, with publication number CN102231043A, cannot be installed on an indoor ceiling, cannot be adjusted in height according to usage needs, and has no safety mechanism. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a projector mounting tube structure, which has a reasonable design and is conducive to preventing the projector from accidentally falling when adjusting its height.

[0006] The projector mounting tube structure of the present utility model is characterized in that it includes an outer sleeve and a telescopic tube sleeved in the outer sleeve body, the outer sleeve is provided with a limiting groove along the length direction that does not penetrate to the upper end and the lower end of the outer sleeve, the upper end of the telescopic tube is provided with a first bolt hole and a first bolt threadedly connected to the first bolt hole, the bolt head of the first bolt passes through the limiting groove, the lower end of the outer sleeve is provided with a plurality of through holes arranged at intervals along the axial direction, the telescopic tube is provided with a plurality of second bolt holes arranged at intervals along the axial direction, the second bolt passes through a through hole and is threadedly connected to a second bolt hole.

[0007] Preferably, the symmetry center line of the above-mentioned limiting groove and the center line of each through hole are located in the same plane and are arranged opposite to each other on the outer sleeve.

[0008] Preferably, the diameter of the outer circumferential wall of the telescopic tube is clearance-fitted with the diameter of the inner circumferential wall of the outer sleeve, and two annular grooves are provided at intervals on the upper part of the telescopic tube, and rubber rings are installed in the annular grooves. The outer diameter of the rubber ring installed on the annular groove is transition-fitted with the diameter of the inner circumferential wall of the outer sleeve.

[0009] Preferably, the upper end of the outer sleeve has a first threaded section, the first threaded section is threadedly connected to the first end of the butt joint tube, and the second end of the butt joint tube is threadedly connected to the second threaded section of the lower end of the extension tube.

[0010] Preferably, a through slot for inserting a cable is provided near the lower end of the extension tube.

[0011] Preferably, the lower portion of the telescopic tube is provided with a third threaded section for threaded connection with the internal thread on the projector.

[0012] The working principle of the projector mounting tube structure of the present invention is that the projector is mounted on the lower end of the telescopic tube (by means of bolt connection or snap connection, etc.). When it is necessary to adjust the height of the projector mounted on the lower end of the telescopic tube, the operator supports the projector with the first hand and unscrews the second bolt mounted on the through hole and the second bolt hole with the second hand. The operator supports the projector with the first hand and adjusts the height up and down. After the height is adjusted to a suitable level, the second bolt is re-installed into the through hole and the second bolt hole. Since the first bolt passes through the limiting groove and is threadedly connected to the first bolt hole, if the operator accidentally fails to support the projector and the projector and the telescopic tube fall, the first bolt mounted on the first bolt hole can be limited by the limiting groove, thereby preventing the telescopic tube and the projector from being separated from the outer sleeve and falling directly, thereby preventing damage to the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0014] The central control reset pedal and its combined connection method of the present invention are further described in detail below with reference to the accompanying drawings and specific implementation structures.

[0015] Figure 1 This is a stereoscopic diagram of an embodiment of the utility model from a first viewing angle (retracted state);

[0016] Figure 2 This is a stereoscopic diagram of an embodiment of the utility model from a second viewing angle (retracted state);

[0017] Figure 3 This is a perspective view of an embodiment of the utility model from a second viewing angle (extended state);

[0018] Figure 4 This is an exploded view of an embodiment of the utility model from a first perspective;

[0019] Figure 5 is an exploded view of a second perspective of an embodiment of the present application;

[0020] Figure 6 is a perspective view of a first perspective of another embodiment of the present application;

[0021] Figure 7 is an exploded view of another embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0024] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0025] In the description of the present application, it should be noted that, unless explicitly defined and limited otherwise, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] Some embodiments of the present application will be described in detail below with reference to the drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] The projector mounting tube structure of the present invention includes an outer sleeve 1 and a telescopic tube 2 sleeved in the outer sleeve body. The projector is mounted at the lower end of the telescopic tube 2 (by means of bolt connection or snap connection, etc., which are prior arts and are not described here). The outer sleeve 1 and the telescopic tube 2 are both round steel tubes or square steel tubes. The outer circumferential wall diameter of the telescopic tube 2 is clearance-matched with the inner circumferential wall diameter of the outer sleeve 1, and the two can slide smoothly.

[0028] A limiting groove 3 is provided on the outer sleeve 1 along the length direction, which does not penetrate to the upper and lower ends of the outer sleeve. The limiting groove 3 is a strip groove. A first bolt hole 4 and a first bolt 5 threadedly connected to the first bolt hole are provided on the upper end of the telescopic tube 2. The bolt head of the first bolt passes through the limiting groove. During installation, the threaded end of the first bolt passes through the limiting groove 3 and is threadedly connected to the first bolt hole 4.

[0029] The lower end of the outer sleeve is provided with a plurality of through holes 6 spaced apart in the axial direction. The telescopic tube is provided with a plurality of second bolt holes 7 spaced apart in the axial direction (the axis of the second bolt hole 7 is perpendicular to the axis of the telescopic tube). The second bolt 7 passes through a through hole and is threadedly connected to a second bolt hole. The aperture of the through hole is larger than the thread diameter of the second bolt 7. After the second bolt 7 passes through the through hole and is threadedly connected to the second bolt hole, the outer sleeve 1 and the telescopic tube 2 cannot move axially relative to each other, even if the position of the projector installed at the lower end of the telescopic tube 2 is relatively fixed.

[0030] For ease of operation and use, the symmetrical center line of the limiting groove 3 and the center line of each through hole 6 are located in the same plane and are arranged opposite to each other on the outer sleeve (ie, offset by 180 degrees in the circumferential direction of the outer sleeve).

[0031] In order to make the telescopic tube and the outer sleeve slide relative to each other with a certain resistance when adjusting the height, and to prevent the telescopic tube and the outer sleeve from scratching and affecting the paint spraying of the tube wall, two annular grooves 8 are provided at intervals on the upper part of the telescopic tube, and a rubber ring 9 is installed in the annular groove. The outer diameter of the rubber ring installed on the annular groove is a transition fit with the diameter of the inner circumferential wall of the outer sleeve. The rubber ring 9 contacts the inner circumferential wall of the outer sleeve, so that the outer circumferential wall of the telescopic tube and the inner circumferential wall of the outer sleeve will not directly contact each other, avoiding scratching of the paint spraying on the tube wall and affecting the appearance. In addition, the contact between the rubber ring 9 and the inner circumferential wall of the outer sleeve also slows down the speed of telescopic sliding of the telescopic tube and the outer sleeve, making it more convenient and quick to adjust the height position; the outer diameter of the rubber ring on the annular groove is a transition fit with the diameter of the inner circumferential wall of the outer sleeve, which is more appropriate. Using a clearance fit cannot achieve the above-mentioned purpose of preventing scratches and slowing down the telescopic speed. Using an interference fit will increase the difficulty of telescopic adjustment and is not conducive to convenient use.

[0032] In order to meet the needs of use with higher ceiling heights, the upper end of the above-mentioned outer sleeve has a first threaded section 10, the first threaded section is threadedly connected to the first end of the docking tube 11, and the second end of the docking tube 11 is threadedly connected to the second threaded section 13 at the lower end of the extension tube 12. The upper end of the extension tube 12 can be fixed by bolts and pins.

[0033] For the sake of reasonable design and convenient use, a through groove 14 for inserting cables is provided near the lower end of the extension tube. The cables are routed from the ceiling and then pass through the through groove 14 before being connected to the projector through the docking tube and the telescopic tube.

[0034] Preferably, the lower portion of the telescopic tube is provided with a third threaded section 15 for threaded connection with the internal thread on the projector. The threaded section 15 can be threadedly connected with the internal thread on the projector to achieve installation of the projector.

[0035] The working principle of the projector mounting tube structure of the present invention is that the projector is mounted on the lower end of the telescopic tube (by means of bolt connection or snap connection, etc.). When it is necessary to adjust the height of the projector mounted on the lower end of the telescopic tube, the operator supports the projector with the first hand and unscrews the second bolt mounted on the through hole and the second bolt hole with the second hand. The operator supports the projector with the first hand and adjusts the height up and down. After the height is adjusted to a suitable level, the second bolt is re-installed into the through hole and the second bolt hole. Since the first bolt passes through the limiting groove and is threadedly connected to the first bolt hole, if the operator accidentally fails to support the projector and the projector and the telescopic tube fall, the first bolt mounted on the first bolt hole can be limited by the limiting groove, thereby preventing the telescopic tube and the projector from being separated from the outer sleeve and falling directly, thereby preventing damage to the projector.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are welcome.

Claims

1. A projector mounting tube structure, characterized in that: It includes an outer sleeve and a telescopic tube sleeved in the outer sleeve body, the outer sleeve is provided with a limit groove along the length direction that does not penetrate to the upper end and the lower end of the outer sleeve, the upper end of the telescopic tube is provided with a first bolt hole and a first bolt threadedly connected to the first bolt hole, the bolt head of the first bolt passes through the limit groove, the lower end of the outer sleeve is provided with a plurality of through holes arranged at intervals along the axial direction, the telescopic tube is provided with a plurality of second bolt holes arranged at intervals along the axial direction, the second bolt passes through a through hole and is threadedly connected to a second bolt hole.

2. The projector mounting tube structure according to claim 1, wherein: The symmetrical center line of the limiting groove and the center line of each through hole are located in the same plane and are arranged opposite to each other on the outer sleeve.

3. The projector mounting tube structure according to claim 2, wherein: The outer circumferential wall diameter of the telescopic tube and the inner circumferential wall diameter of the outer sleeve are in a clearance fit. Two annular grooves are provided at intervals on the upper part of the telescopic tube. Rubber rings are installed in the annular grooves. The outer diameter of the rubber ring installed on the annular groove and the inner circumferential wall diameter of the outer sleeve are in a transition fit.

4. The projector mounting tube structure according to claim 3, wherein: The upper end of the outer sleeve has a first threaded section, the first threaded section is threadedly connected to the first end of the butt joint pipe, and the second end of the butt joint pipe is threadedly connected to the second threaded section of the lower end of the extension pipe.

5. The projector mounting tube structure according to claim 4, wherein: A through slot for inserting a cable is provided on the extension tube near the lower end.

6. The projector mounting tube structure according to claim 1, wherein: The lower part of the telescopic tube is provided with a third thread section for threaded connection with the internal thread on the projector.

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