Lens protection device for portable measuring instrument

Abstract

The utility model provides a device for protecting a lens of a portable measuring instrument, which relates to the technical field of measuring instruments, comprises a protective shell and a measuring instrument body, and is characterized in that the lower end of the measuring instrument body is arranged on the inner bottom wall of the protective shell, and an opening and closing protective mechanism is arranged outside the protective shell. The opening and closing protection mechanism comprises a first support, a rotating block, a rotating rod and a triangular protection plate, the opening and closing protection mechanism can be opened when the measuring instrument body is used, and the driving mechanism and the opening and closing protection mechanism are matched for use, so that when the measuring instrument body extends into a pipeline for measurement, the measuring instrument body can be opened; the front end of the protective shell is blocked through the triangular protective plate, dust and sharp objects are prevented from polluting or even damaging the lens when the lens extends into the protective shell, the triangular protective plate is automatically opened when the lens reaches the position for measurement, and therefore the measuring instrument body can conveniently conduct collection and measurement, the lens is effectively protected, and the measurement accuracy is improved. And the measurement accuracy is also improved.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, and in particular to a lens protection device for portable measuring instruments. Background Technology

[0002] Measuring instruments are the third-party standards required to measure certain properties of a target object. Measuring instruments generally have units such as scale and volume. The contents of measuring instruments include accuracy, error, measuring standard materials, length measurement, angle measurement, shape measurement, traditional optical instruments, etc. There are two types of measuring instruments: contact measurement and optical measurement. Common types include electronic measuring instruments and image measuring instruments. When using portable measuring instruments to measure the inner wall of pipes or the inner wall of equipment holes, a telescopic rod is usually used to extend the measuring head of the measuring instrument into the inner wall of the pipe or hole for measurement.

[0003] Existing portable measuring instruments, when inserted into the inner wall of pipes or holes for measurement, are susceptible to problems due to the complexity of the interior of pipes and holes, which may contain various sharp objects such as burrs, welding residues, or other rough surface structures. When the measuring instrument's lens is inserted into the pipe, dust and oil from inside the pipe can easily contaminate the lens, affecting light transmittance and reducing image contrast. Furthermore, some sharp objects can easily scratch the lens. Once the lens is scratched, the scratches on the lens surface will cause light scattering, blurring the image and affecting the accuracy of the measurement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies. Currently, when portable measuring instruments are inserted into the inner wall of pipes or holes for measurement, dust and oil in the pipes can easily contaminate the lens, affecting light transmittance and reducing image contrast. Furthermore, sharp objects can easily scratch the lens. Once the lens is scratched, the scratches on the lens surface can cause light scattering, blurring the image and affecting the accuracy of the measurement.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A protective device for the lens of a portable measuring instrument includes a protective housing and a measuring instrument body. The device is characterized in that: the lower end of the measuring instrument body is installed on the inner bottom wall of the protective housing, and the outside of the protective housing is provided with an opening and closing protective mechanism, which includes a first support, a rotating block, a rotating rod and a triangular protective plate. The opening and closing protective mechanism serves to open the measuring instrument body when it is in use and to close it for protection when it is not in use.

[0007] The protective housing is equipped with a drive mechanism, which includes a drive block, a pull rope, a threaded block, a lead screw, and a servo motor. The drive mechanism provides power for the opening and closing action of the protective mechanism, thereby enabling automated driving.

[0008] Preferably, a plurality of the first supports are arranged in a ring array and fixed to the outside of the protective housing. The two ends of the rotating rod are rotatably connected to the inner walls of the two sides of the first support through bearings. The inner wall of the rotating block is fixedly sleeved to the outside of the rotating rod. The two ends of the rotating block are fixedly connected with symmetrically distributed torsion springs.

[0009] Preferably, one end of the torsion spring is fixedly connected to one side of the inner wall of the first support, one end of the rotating block is fixedly connected to one side of the triangular protective plate, the two inclined surfaces of the plurality of triangular protective plates are in contact with each other, and one side of the plurality of triangular protective plates is in close contact with one end of the protective shell.

[0010] Preferably, one side of the servo motor is fixedly installed on one inner wall of the protective housing, the output shaft of the servo motor is fixedly connected to one end of the lead screw through a coupling, and the outer side of the protective housing is provided with stroke grooves distributed in a ring array.

[0011] Preferably, the outer side of the lead screw is threadedly connected to the inner wall of the threaded block, the inner wall of the stroke groove is slidably connected to the outer side of the drive block, and one end of each of the drive blocks is fixedly connected to the periphery of the threaded block.

[0012] Preferably, one side of the drive block is fixedly connected to one end of the pull rope, the other end of the pull rope is fixedly connected to the upper end of the rotating block, and a second support arranged in a ring array is fixedly connected to the outside of the protective shell.

[0013] Preferably, the inner wall of the second support is rotatably connected to a guide wheel via a bearing, the lower end of the guide wheel is in rotatable contact with the outside of the pull rope, and the other end of the protective housing is provided with a telescopic rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the combined use of the drive mechanism and the opening and closing protective mechanism serves to prevent dust and sharp objects from contaminating or damaging the lens when the measuring instrument body is inserted into the pipe for measurement. The triangular protective plate first blocks the front end of the protective housing, preventing dust and sharp objects from contaminating or damaging the lens. When the measuring position is reached, the triangular protective plate is automatically opened, facilitating the measuring instrument body to collect measurements. This not only effectively protects the lens but also improves the accuracy of the measurement. Attached Figure Description

[0016] Figure 1 A schematic diagram of the main structure of a lens protection device for portable measuring instruments provided by this utility model;

[0017] Figure 2 A perspective view of a protective housing structure for a lens protection device of a portable measuring instrument provided by this utility model;

[0018] Figure 3 A perspective view of the main body structure of a measuring instrument for a lens protection device for portable measuring instruments provided by this utility model;

[0019] Figure 4 A perspective view of a lead screw structure for a lens protection device for portable measuring instruments provided by this utility model;

[0020] Figure 5 A perspective view of the first support structure for a lens protection device for portable measuring instruments provided by this utility model.

[0021] Legend: 1. Protective housing; 2. Measuring instrument body; 3. First support; 31. Rotating block; 32. Rotating rod; 33. Triangular protective plate; 34. Torsion spring; 4. Drive block; 41. Pull rope; 42. Threaded block; 43. Lead screw; 44. Servo motor; 45. Stroke groove; 46. Second support; 47. Guide wheel; 5. Telescopic rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Example

[0027] like Figure 1-5 As shown, this utility model provides a technical solution: a protective device for the lens of a portable measuring instrument, comprising a protective housing 1 and a measuring instrument body 2, characterized in that: the lower end of the measuring instrument body 2 is installed on the inner bottom wall of the protective housing 1, and an opening and closing protective mechanism is provided on the outside of the protective housing 1, and the opening and closing protective mechanism includes a first support 3, a rotating block 31, a rotating rod 32 and a triangular protective plate 33, which serves to open the measuring instrument body 2 when it is in use and close it for protection when it is not in use;

[0028] The protective housing 1 is equipped with a drive mechanism, which includes a drive block 4, a pull rope 41, a threaded block 42, a lead screw 43, and a servo motor 44. The drive mechanism provides power for the opening and closing action of the protective mechanism, thereby enabling automated driving.

[0029] When the measuring instrument body 2 is inserted into the pipe for measurement, the front end of the protective housing 1 is first blocked by the triangular protective plate 33 to prevent dust and sharp objects from contaminating or even damaging the lens. The triangular protective plate 33 is automatically opened to facilitate the measuring instrument body 2 to collect measurements. This not only effectively protects the lens but also improves the accuracy of the measurement.

[0030] Several first supports 3 are arranged in a ring array and fixed on the outside of the protective shell 1. The two ends of the rotating rod 32 are rotatably connected to the inner walls of the two sides of the first support 3 through bearings. The inner wall of the rotating block 31 is fixedly sleeved with the outside of the rotating rod 32. The first support 3 provides stable support for the rotating rod 32 when it rotates, and the rotating rod 32 rotates in cooperation with the rotating block 31.

[0031] The two ends of the rotating block 31 are fixedly connected with symmetrically distributed torsion springs 34. When the rotating block 31 rotates, the torsion springs 34 store energy. When the rotational force is lost, the torsion of the torsion springs 34, together with the rotating rod 32, drives the rotating block 31 to reset and rotate.

[0032] One end of the torsion spring 34 is fixedly connected to the inner wall of one side of the first support 3, and one end of the rotating block 31 is fixedly connected to one side of the triangular protective plate 33. The rotation of the rotating block 31 causes the triangular protective plate 33 to flip, and the flipping of the triangular protective plate 33 enables one end of the protective shell 1 to be opened or protected.

[0033] The two inclined surfaces of several triangular protective plates 33 are in contact with each other, and one side of several triangular protective plates 33 is in contact with one end of the protective housing 1. The four triangular protective plates 33 cooperate with each other to protect and seal one end of the protective housing 1, which not only protects the lens from dust, but also prevents sharp objects from damaging the lens.

[0034] One side of the servo motor 44 is fixedly installed on the inner wall of one side of the protective housing 1. The output shaft of the servo motor 44 is fixedly connected to one end of the lead screw 43 through a coupling. As an independent drive source, the servo motor 44 can be powered by a battery installed inside the protective housing 1, thereby ensuring that the servo motor 44 can stably drive the lead screw 43 to rotate clockwise and counterclockwise.

[0035] The protective housing 1 has stroke grooves 45 arranged in a ring array on its exterior. The stroke grooves 45 guide the movement stroke of the drive block 4 and change the rotation of the drive block 4 into linear movement.

[0036] The lead screw 43 is threaded to the inner wall of the threaded block 42, and the inner wall of the stroke groove 45 is slidably connected to the outer wall of the drive block 4. One end of several drive blocks 4 is fixedly connected to the periphery of the threaded block 42. The lead screw 43 is a cylindrical rod with external threads, and the threaded block 42 is a component with internal threads. They achieve transmission through the meshing of the threads. When the lead screw 43 rotates, due to the action of the threads, the threaded block 42 will move linearly along the axial direction of the lead screw 43 through the rotation limit of the stroke groove and the drive block 4.

[0037] One side of the drive block 4 is fixedly connected to one end of the pull rope 41, and the other end of the pull rope 41 is fixedly connected to the upper end of the rotating block 31. The movement of the drive block 4 drives one end of the pull rope 41 to move, thereby driving the rotating block 31 to be pulled through the other end of the pull rope 41.

[0038] The protective housing 1 is fixedly connected to a second support 46 arranged in a ring array. The inner wall of the second support 46 is rotatably connected to a guide wheel 47 through a bearing. With the cooperation of the guide wheel 47, the pull rope 41 is positioned at a lower level near the rotating block 31. Therefore, under the continuous pulling force, the rotating block 31 is pulled and flipped. The lower end of the guide wheel 47 makes rotational contact with the outside of the pull rope 41.

[0039] The other end of the protective shell 1 is provided with a telescopic rod 5, which is a handheld rod in the prior art. The telescopic rod 5 has three sections, namely the first section, the second section and the third section from the outside to the inside. The second section can slide inside the first section, and the third section can slide inside the second section. This nested structure allows the telescopic rod 5 to maintain a compact shape when retracted, and to extend to the required length when extended. The rear end of the telescopic rod 5 is provided with a handle for easy gripping.

[0040] The working process of this utility model:

[0041] Step 1: By holding one end of the telescopic rod 5, insert the protective housing 1 into the pipe. During the insertion process, multiple triangular protective plates 33 block the front end of the protective housing 1, thereby preventing dust and sharp objects from contaminating or even damaging the lens of the measuring instrument body 2 inside the protective housing 1. After being inserted to the appropriate position, start the servo motor 44 to drive the lead screw 43 to rotate counterclockwise. The rotation of the lead screw 43 is limited by the stroke groove 45, causing its threaded block 42 to drive the drive block 4 to move. The movement of the drive block 4 pulls the pull rope 41 to move. The pull rope 41 drives the rotating block 31 to rotate through the guide wheel 47. The rotation of the rotating block 31 drives the torsion spring 34 to rotate and store energy, and causes the triangular protective plate 33 to flip open, thereby facilitating the internal measuring instrument body 2 to perform identification and measurement.

[0042] Step 2: After the measurement is completed, start the servo motor 44 to drive the lead screw 43 to rotate clockwise, so that its threaded block 42 drives the drive block 4 to reset and move. At this time, the tension of the pull rope 41 disappears, and the torque of the torsion spring 34 drives the rotating block 31 to reset and rotate through the cooperation of the rotating rod 32, thereby driving the triangular protective plate 33 to reset and rotate so that it blocks and protects the front end of the protective shell 1. Then the measuring instrument body 2 can be moved out of the pipeline by the retraction of the telescopic rod 5.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for the lens of a portable measuring instrument, comprising a protective housing (1) and a measuring instrument body (2), characterized in that: The lower end of the measuring instrument body (2) is installed on the inner bottom wall of the protective housing (1). The protective housing (1) is provided with an opening and closing protective mechanism, which includes a first support (3), a rotating block (31), a rotating rod (32) and a triangular protective plate (33). The opening and closing protective mechanism can be used to open the measuring instrument body (2) when it is in use and to close it for protection when it is not in use. The protective housing (1) is equipped with a drive mechanism, which includes a drive block (4), a pull rope (41), a threaded block (42), a lead screw (43), and a servo motor (44). The drive mechanism provides a power source for the opening and closing action of the protective mechanism, thereby enabling automated driving.

2. The lens protection device for portable measuring instruments according to claim 1, characterized in that: Several first supports (3) are arranged in a ring array and fixed to the outside of the protective shell (1). The two ends of the rotating rod (32) are rotatably connected to the inner walls of the two sides of the first support (3) through bearings. The inner wall of the rotating block (31) is fixedly sleeved to the outside of the rotating rod (32). The two ends of the rotating block (31) are fixedly connected to torsion springs (34) that are symmetrically distributed.

3. A lens protection device for portable measuring instruments according to claim 2, characterized in that: One end of the torsion spring (34) is fixedly connected to the inner wall of one side of the first support (3), one end of the rotating block (31) is fixedly connected to one side of the triangular protective plate (33), the two inclined surfaces of several triangular protective plates (33) are in contact with each other, and one side of several triangular protective plates (33) is in contact with one end of the protective shell (1).

4. A lens protection device for portable measuring instruments according to claim 1, characterized in that: One side of the servo motor (44) is fixedly installed on the inner wall of one side of the protective housing (1). The output shaft of the servo motor (44) is fixedly connected to one end of the lead screw (43) through a coupling. The outer side of the protective housing (1) is provided with stroke grooves (45) arranged in a ring array.

5. A lens protection device for portable measuring instruments according to claim 4, characterized in that: The outer side of the lead screw (43) is threadedly connected to the inner wall of the threaded block (42), the inner wall of the stroke groove (45) is slidably connected to the outer side of the drive block (4), and one end of several drive blocks (4) is fixedly connected to the periphery of the threaded block (42).

6. A lens protection device for portable measuring instruments according to claim 1, characterized in that: One side of the drive block (4) is fixedly connected to one end of the pull rope (41), and the other end of the pull rope (41) is fixedly connected to the upper end of the rotating block (31). The outer side of the protective shell (1) is fixedly connected to a second support (46) arranged in a ring array.

7. A lens protection device for portable measuring instruments according to claim 6, characterized in that: The inner wall of the second support (46) is rotatably connected to a guide wheel (47) via a bearing, and the lower end of the guide wheel (47) is in rotatable contact with the outside of the pull rope (41).

8. A lens protection device for portable measuring instruments according to claim 1, characterized in that: A telescopic rod (5) is provided at the other end of the protective housing (1).

Images