CN218003748U - Protector capable of rotating coaxial light source - Google Patents

Abstract

The utility model provides a protection device capable of rotating a coaxial light source, which is used for a measuring instrument and protects an annular light source of the measuring instrument, the protection device comprises a fixed part, an induction part and a control part, wherein the coaxial light source is arranged on the measuring instrument; the sensing part comprises a first metal sheet arranged on the connecting rod and a first sensing group arranged on the fixed seat; the control part is connected with the first sensing group to control the motion state of the annular light source. According to the utility model discloses, can provide one kind and do not make annular light source and coaxial light source bump and then can protect the annular light source's of measuring instrument protection device as far as possible.

Description

Protector capable of rotating coaxial light source

Technical Field

The utility model relates to a can make rotatory protection device of coaxial light source.

Background

An optical dimension measuring instrument (hereinafter, simply referred to as a measuring instrument) is a measuring instrument integrating the fields of optics and computer image processing techniques and having high accuracy, high efficiency and high reliability. Currently, in order to measure the dimension information of the object to be measured more accurately, a bottom light source, a ring light source, or a coaxial light source is used in the measuring instrument to illuminate the object to be measured to obtain the measurement information of the object to be measured.

In the prior art, an annular light source and a bottom light source are usually fixed in a measuring instrument, while a coaxial light source is usually detachably arranged on a host of the measuring instrument, and when the coaxial light source is required to illuminate an object to be measured, the coaxial light source is arranged on the host; when the coaxial light source is not needed to illuminate the object to be measured, the coaxial light source is detached from the host. The operation is complicated, the workload of operators is increased, the measurement efficiency is reduced, and the errors are brought to the measuring instrument by frequently mounting and dismounting the coaxial light source, so that the measurement precision of the measuring instrument is reduced. Meanwhile, the measuring instrument often needs to move the Z-axis module in the vertical direction to complete the measurement of the object to be measured, and when the Z-axis module moves, the annular light source and the coaxial light source can be driven to move coaxially and simultaneously. Therefore, there is a need for a device that reduces the possibility of collision between the annular light source and the coaxial light source without disassembling the coaxial light source.

Disclosure of Invention

The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide a protection device for an annular light source that can protect a measuring instrument without colliding with a coaxial light source as much as possible.

To this end, the utility model provides a protection device that can make coaxial light source rotatory is the protection device that is used for measuring instrument and protects the annular light source of measuring instrument, protection device includes the fixed part that sets up coaxial light source in measuring instrument, sets up induction part and the control part at the fixed part, the fixed part is including setting up in the fixing base of measuring instrument, connecting rod that connects coaxial light source and rotatably set up in the fixing base; the induction part comprises a first metal sheet arranged on the connecting rod and a first induction group arranged on the fixed seat; the control part is connected with the first induction group to control the motion state of the annular light source.

Under the condition, in the process that the measuring instrument measures the object to be measured, the protection device can control the motion state of the annular light source of the measuring instrument by judging the state of the first induction group arranged on the fixed seat, so that the possibility of collision between the annular light source and the coaxial light source is reduced, and the protection device can play a role in protecting the annular light source.

Additionally, in the protection device of the present invention, optionally, the fixing base includes a first side plate and a second side plate which are disposed on the bottom plate of the measuring instrument, formed on the bottom plate, and disposed on opposite sides of the bottom plate, wherein the bottom plate, the first side plate, and the second side plate form a groove for allowing the connecting rod to be rotatably disposed on the fixing base. In this case, the fixing base is provided to the measuring instrument through the bottom plate, and the grooves are formed through the first side plate and the second side plate formed at opposite sides of the bottom plate, so that the connection rod can be provided to the fixing base, whereby the connection rod can be rotatably provided to the fixing base through the grooves.

Additionally, in the protection device of the present invention, optionally, one end of the groove has an inclined surface that matches the connecting rod. In some examples, one end of the groove may have an inclined surface that mates with the connecting rod. In this case, the rotatable angle of the connecting rod can be increased.

Additionally, in the protection device of the present invention, optionally, the connecting rod includes a first end portion matched with the groove, a second end portion for connecting the coaxial light source and the second end portion are in a long strip shape, and an intermediate portion for connecting the first end portion and the second end portion and having an inner side surface matched with the inclined surface. In this case, the connecting rod can be rotatably disposed on the fixing base by disposing the first end portion in the groove, the coaxial light source can be rotated along with the rotation of the connecting rod by disposing the coaxial light source on the second end portion, and the maximum rotation angle of the connecting rod can be controlled by the cooperation between the inner side surface and the inclined surface, so that the coaxial light source can be more accurately rotated to a position directly below the ring-shaped light source.

Additionally, in the protection device of the present invention, optionally, the protection device further comprises a connecting shaft for connecting the fixing base and the connecting rod, the first side plate has a first through hole matched with the connecting shaft, the second side plate has a second through hole matched with the connecting shaft, the first end portion has a third through hole matched with the connecting shaft, the connecting shaft passes through the first through hole, the third through hole and the second through hole to rotatably fix the connecting rod to the fixing base. Under this condition, set up the first end of connecting rod in the recess, pass first through-hole, second through-hole and third through-hole in proper order through the connecting axle and can make the connecting rod have fixed pivot (connecting axle), from this, can both make the connecting rod freely rotate in the plane that is on a parallel with load-bearing platform through stirring the optional position of connecting rod.

Additionally, in the protection device of the present invention, optionally, the sensing portion further includes a second metal piece disposed on the connecting rod and a second sensing set disposed on the fixing base, and the control portion is connected to the second sensing set to control the operating state of the coaxial light source. In this case, if the connecting rod is rotated to make the second metal sheet contact with the second sensing group, it can be determined that the coaxial light source is located right below the annular light source, and the control portion can control the coaxial light source to be in a working state according to the state of the second sensing group at the moment; when the second metal sheet is separated from the second induction group, the coaxial light source is in an unusable state; this can reduce the possibility of the coaxial light source being used erroneously.

Additionally, in the protection device of the present invention, optionally, the bottom plate has a fourth through hole for setting the first sensing group and a fifth through hole for setting the second sensing group, and the fourth through hole and the fifth through hole are symmetrically arranged with respect to the center of the bottom plate. Therefore, the first induction group and the second induction group can be arranged on the bottom plate through the fourth through hole and the fifth through hole respectively.

Further, in the protection device of the present invention, optionally, the first metal piece and the second metal piece are provided on opposite sides of the connecting rod. In this case, the first metal sheet can be brought into contact with or separated from the first sensing group or the second metal sheet can be brought into contact with or separated from the second sensing group by rotating the connecting rod.

In addition, in the protection device of the present invention, optionally, the first sensing group includes two elastic contacts, and the two contacts of the first sensing group are in contact with the first metal sheet to communicate with the first sensing group; the second induction group comprises two elastic contacts, and the two contacts of the second induction group are in contact with the second metal sheet to be communicated with the second induction group. In this case, the position of the coaxial light source can be determined by determining whether the first sensing group and the second sensing group are communicated, if the first sensing group is communicated, the coaxial light source is far away from the right lower part of the ring light source to the maximum extent, and the control part can control the free lifting of the ring light source; if the second induction group is communicated, the coaxial light source is positioned right below the coaxial light source at the moment, and the control part can control the coaxial light source to be in a working state; if the first sensing group and the second sensing group are not communicated, the coaxial light source is located at the middle position at the moment, the control part controls the annular light source not to descend, and the coaxial light source is controlled to be in a non-working state.

In addition, in the protection device according to the present invention, optionally, the first sensing group is a rotation start point of the connecting rod when contacting the first metal piece, and the second sensing group is a rotation end point of the connecting rod when contacting the second metal piece; or the first sensing group is the rotation end point of the connecting rod when in contact with the first metal sheet, and the second sensing group is the rotation starting point of the connecting rod when in contact with the second metal sheet. Under the condition, the position of the coaxial light source can be judged in time through the contact and separation of the first metal sheet and the first induction group and the contact and separation of the second metal sheet and the second induction group, and then the annular light source and the coaxial light source can be controlled correspondingly.

According to the utility model discloses, can provide one kind and do not make annular light source and coaxial light source bump and then can protect the annular light source's of measuring instrument protection device as far as possible.

Drawings

Fig. 1 is a view showing an application scenario of a protection device according to an example of the present invention.

Fig. 2 is a view showing a coaxial light source in a first position according to an example of the present invention.

Fig. 3 is a view showing a coaxial light source at a second position according to an example of the present invention.

Fig. 4 is a block diagram showing a protection device according to an example of the present invention.

Fig. 5 is a schematic perspective view showing a protection device according to an example of the present invention.

Fig. 6 is a schematic perspective view illustrating a fixing base according to an example of the present invention without a connecting shaft.

Fig. 7 is a schematic perspective view showing a fixing seat provided with a connecting shaft according to an example of the present invention.

Fig. 8 is a schematic view illustrating a connecting rod according to an example of the present invention at a first viewing angle.

Fig. 9 is a schematic diagram illustrating a connecting rod according to an example of the present invention in a second viewing angle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment in the utility model, all other embodiments that ordinary skilled person in the art filled under the prerequisite of not making the creative work all belong to the scope of the utility model.

It should be noted that the terms "first", "second", "third" and "fourth" etc. in the description and claims of the present invention and the above-mentioned drawings are used for distinguishing different objects, and are not used for describing a specific order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

The utility model relates to a be used for measuring instrument and can make rotatory protection device of coaxial light source (hereinafter abbreviated as protection device), at the measuring instrument and carrying out the measuring in-process to the determinand, protection device sets up the state of group through judging in the first response of fixing base, can control the motion state of the annular light source of measuring instrument, and then can reduce the possibility that annular light source and coaxial light source bump, and from this, protection device can play the effect of protection annular light source.

Hereinafter, the protection device according to the present embodiment will be described in detail with reference to the drawings.

Fig. 1 is a diagram showing an application scenario of a protection device 10 according to an example of the present invention.

In the present embodiment, the protection device 10 may be applied to the measuring instrument 1 shown in fig. 1. In some examples, the measurement instrument 1 may be an instrument for measuring information of an object to be measured (for example, information of measuring a two-dimensional size, a three-dimensional size, or the like of the object to be measured). For example, the measuring instrument 1 may be a flash meter, an image measuring instrument, or the like.

In some examples, the measurement instrument 1 may include a carrier platform 20 for carrying the test object and light sources for illuminating the test object, such as an annular light source 30, a coaxial light source 40, and a bottom light source. Wherein the ring light source 30 and the coaxial light source 40 can be disposed above the measuring platform. The bottom light source may be disposed below the load-bearing platform 20.

Fig. 2 is a scene diagram illustrating a coaxial light source 40 according to an example of the present invention in a first position. Fig. 3 is a view showing a second position of the coaxial light source 40 according to an example of the present invention. Meanwhile, the application scene diagram shown in fig. 1 may also be referred to as a scene diagram of the coaxial light source 40 in the third position according to the example of the present invention

In the protection device 10 according to the present embodiment, the coaxial light source 40 may be disposed between the ring-shaped light source 30 and the supporting platform 20, and the coaxial light source 40 may be freely rotated in a plane parallel to the supporting platform 20. For example, as shown in fig. 1 to 3, the coaxial light source 40 can be rotated by the protection device 10 to make the coaxial light source 40 far away from or close to the ring-shaped light source 30.

In some examples, if the coaxial light source 40 is not required to illuminate the object, the coaxial light source 40 can be rotated to be located at a first position, i.e., a position away from the position directly below the annular light source 30 (see fig. 2). In some examples, if the coaxial light source 40 is required to illuminate the object, the coaxial light source 40 can be rotated to be located at the second position, i.e. directly below the annular light source 30 (see fig. 3). In this case, the coaxial light source 40 does not need to be frequently detached and attached, and the object to be measured can be illuminated by different light sources, whereby the measurement efficiency of the measuring instrument 1 can be improved.

In some examples, during adjustment of the coaxial light source 40 from the first position to the second position, or adjustment of the coaxial light source 40 from the second position to the first position, the coaxial light source 40 may be in a third position as shown in fig. 1.

Fig. 4 is a block diagram showing a protective device 10 according to an example of the present invention. Fig. 5 is a schematic perspective view showing a protective device 10 according to an example of the present invention.

In some examples, the protection device 10 may include a fixing portion 100, a sensing portion 200, and a control portion 300 (see fig. 4). Wherein the fixing portion 100 may be used to arrange the coaxial light source 40 to the surveying instrument 1. The sensing part 200 can know the position state of the coaxial light source 40 at the fixing part 100. The control part 300 may be used to control the ring light source 30 and the coaxial light source 40.

Referring to fig. 5, in the present embodiment, the fixing part 100 may include a fixing base 110 and a connection rod 120. Wherein, the fixing seat 110 may be disposed on the measuring instrument 1. The connecting rod 120 may be used to connect the coaxial light sources 40. Thereby, the fixing portion 100 can install the coaxial light source 40 in the surveying instrument 1.

Fig. 6 is a schematic perspective view illustrating a structure of the fixing base 110 without the connecting shaft 130 according to an example of the present invention.

Referring to fig. 6, in the present embodiment, the fixing base 110 may include a bottom plate 111 disposed on the measuring instrument 1, and a first side plate 112 and a second side plate 113 formed on the bottom plate 111 and disposed on opposite sides of the bottom plate 111. In some examples, the bottom plate 111, the first side plate 112, and the second side plate 113 may form a groove that allows the connecting rod 120 to be rotatably disposed on the fixing base 110. In this case, the fixing base 110 is provided to the surveying instrument 1 through the bottom plate 111, and the connecting rod 120 can be provided to the fixing base 110 by forming grooves through the first side plate 112 and the second side plate 113 formed at opposite sides of the bottom plate 111, whereby the connecting rod 120 can be rotatably provided to the fixing base 110 through the grooves.

In some examples, the bottom panel 111, the first side panel 112, and the second side panel 113 may be integrally formed. This can increase the structural stability of the fixing base 110.

In some examples, the base plate 111 may have a plurality of protrusions that snap-fit with the gauge 1. The base plate 111 may be adapted to engage the holder 110 with the measuring instrument 1 via a plurality of protrusions. Thereby, the fixing base 110 can be fixed to the surveying instrument 1.

In some examples, the first side plate 112 may have a first screw hole 112a, and the second side plate 113 may have a second screw hole 113a (see fig. 6). The fixing portion 100 may further include screws matched with the first and second screw holes 112a and 113 a. The fixing base 110 may be disposed on the measuring instrument 1 by the screw coupling of the first screw hole 112a and the screw, and the fixing base 110 may be disposed on the measuring instrument 1 by the screw coupling of the second screw hole 113a and the screw, whereby the fixing base 110 may be more stably disposed on the measuring instrument 1, and thus, the measurement stability of the coaxial light source 40 may be increased when the coaxial light source 40 is used.

In some examples, the first side plate 112 may have a first through hole 112b, and the second side plate 113 may have a second through hole 113b (described later).

Fig. 7 is a schematic perspective view illustrating the connection shaft 130 provided on the fixing base 110 according to an example of the present invention. Fig. 8 is a schematic diagram illustrating a connecting rod 120 according to an example of the present invention in a first viewing angle. Fig. 9 is a schematic diagram illustrating a connecting rod 120 according to an example of the present invention in a second viewing angle.

As mentioned above, the connecting rod 120 may be disposed in the groove and further rotatably disposed on the fixing base 110. In some examples, the second side plate 113 may be provided with a stopper 140 for stopping the connection rod 120. The stopper 140 may not cause an undesired rotation of the connecting rod 120.

In some examples, one end of the groove may have an inclined surface S matching the connecting rod 120. In this case, the rotatable angle of the connecting rod 120 can be increased. Referring to fig. 8 or 9, in some examples, the connecting rod 120 may include a first end 121 that mates with the groove. In this case, the connecting rod 120 may be rotatably disposed on the fixing base 110 by disposing the first end portion 121 in the groove.

Referring to fig. 8 and 9, in some examples, the connecting rod 120 may further include a second end portion 122 in an elongated shape for connecting the coaxial light source 40, and an intermediate portion 123 for connecting the first end portion 121 and the second end portion 122. In some examples, the middle portion 123 may have an inner side surface Q that matches the inclined surface S. In this case, the coaxial light source 40 can be rotated by the rotation of the link lever 120 by providing the coaxial light source 40 at the second end portion 122, and since the intermediate portion 123 has the inner side surface Q matching the inclined surface S, the maximum rotation angle of the link lever 120 can be controlled by the mutual matching of the inner side surface Q and the inclined surface S, so that the coaxial light source 40 can be more accurately rotated to just below the ring light source 30.

In the present embodiment, the protection device 10 may further include a connection shaft 130 (see fig. 7) for connecting the fixing base 110 and the connection rod 120. The connection rod 120 and the fixing base 110 may be connected by a connection shaft 130. Specifically, in some examples, the first side plate 112 may have a first through hole 112b to be matched with the connection shaft 130, the second side plate 113 may have a second through hole 113b to be matched with the connection shaft 130, and the first end portion 121 may have a third through hole 121a to be matched with the connection shaft 130 (see fig. 6). In some examples, the connection shaft 130 may pass through the first through hole 112b, the third through hole 121a, and the second through hole 113b to dispose the connection rod 120 to the fixing base 110. In this case, the first end portion 121 of the connecting rod 120 is disposed in the groove, and the connecting rod 120 can have a fixed rotation axis (connecting shaft 130) by sequentially passing the connecting shaft 130 through the first through hole 112b, the third through hole 121a, and the second through hole 113b, whereby the connecting rod 120 can be freely rotated in a plane parallel to the supporting platform 20 by shifting any position of the connecting rod 120.

In some examples, a face of the first end 121 proximate to the bottom plate 111 may be rounded. Thereby, the rotation of the connection rod 120 can be facilitated.

In some examples, the second end 122 may have a plurality of screw holes. For example, there may be screw holes 122a and 122b (see fig. 8). The coaxial light source 40 may be threadably secured to the second end 122 by providing screws or bolts in a plurality of threaded holes.

In some examples, the sensing portion 200 may be disposed on the fixing base 110 and the connecting rod 120 to determine the position of the connecting rod 120, and thus the position of the coaxial light source 40. In the present embodiment, the sensing part 200 may include a first metal sheet 210 disposed on the connecting rod 120, and a first sensing group 230 disposed on the fixing base 110 (see fig. 7 and 8). Whether the coaxial light source 40 is located at the first position can be determined by determining whether the first metal sheet 210 and the first sensing set 230 are in contact.

In some examples, the sensing part 200 may further include a second metal sheet 220 disposed on the connection rod 120, and a second sensing group 240 disposed on the fixing base 110 (see fig. 7 and 9). Whether the coaxial light source 40 is located at the second position can be determined by determining whether the second metal sheet 220 and the second sensing set 240 are in contact.

In some examples, the first sensing set 230 and the second sensing set 240 may be disposed on the fixing base 110. As shown in fig. 7, the bottom plate 111 of the fixing base 110 may have a fourth through hole 111a for disposing the first sensing group 230 and a fifth through hole 111b for disposing the second sensing group 240, and the fourth through hole 111a and the fifth through hole 111b may be symmetrically arranged with respect to the center of the bottom plate 111. Accordingly, the first sensing group 230 and the second sensing group 240 can be disposed on the bottom plate 111 through the fourth through hole 111a and the fifth through hole 111b, respectively.

In some examples, the first metal sheet 210 and the second metal sheet 220 may be disposed on opposite sides of the connecting bar 120. Specifically, the first end portion 121 is disposed at opposite sides thereof. In this case, the first metal sheet 210 and the first sensing group 230 can be brought into contact or separated, or the second metal sheet 220 and the second sensing group 240 can be brought into contact or separated by rotating the connection rod 120.

In this embodiment, the first sensing group 230 may be a rotation start point of the connecting rod 120 when contacting the first metal sheet 210, and the second sensing group 240 may be a rotation end point of the connecting rod 120 when contacting the second metal sheet 220; or the first sensing group 230 may be a rotation end point of the connecting rod 120 when contacting the first metal sheet 210, and the second sensing group 240 may be a rotation start point of the connecting rod 120 when contacting the second metal sheet 220. In this case, the position of the coaxial light source 40 can be determined in time by the contact and separation of the first metal sheet 210 and the first sensing group 230 and the contact and separation of the second metal sheet 220 and the second sensing group 240, so that the ring-shaped light source 30 and the coaxial light source 40 can be controlled accordingly.

In some examples, when the rotating connecting rod 120 brings the first metal sheet 210 and the first sensing set 230 into contact, then the coaxial light source 40 may be located at the first position. Operation of the coaxial light source 40 is not required at this time. In other words, the coaxial light source 40 is far away from the ring light source 30 at this time, and the ring light source 30 can move freely according to actual needs. Thus, the ring light source 30 does not collide with the coaxial light source 40 during the descent.

In some examples, the ring light source 30 may be locked and not descended when the rotating connecting bar 120 separates the first metal sheet 210 and the first sensing group 230. That is, when the coaxial light source 40 is in the second position or the third position, the ring light source 30 is locked and cannot be lowered alone. This prevents the ring light source 30 from colliding with the coaxial light source 40. It should be noted that the ring light source 30 is locked, meaning that the ring light source 30 cannot be moved alone in a direction perpendicular to the load-bearing platform 20.

As described above, the protection device 10 may further include the control portion 300. In some examples, the control part 300 may be connected with the first sensing set 230 to control a motion state of the ring light source 30. Specifically, the control part 300 may be connected with the first sensing group 230 to control the descent of the ring light source 30. In this case, if the first sensing group 230 is connected, the ring-shaped light source 30 may be lowered, and if the first sensing group 230 is not connected, the ring-shaped light source 30 may be locked and may not be lowered, whereby the motion state of the ring-shaped light source 30 can be controlled by the state of the first sensing group 230.

In some examples, the control part 300 may also be connected with the second sensing group 240 to control the operation state of the coaxial light source 40. In this case, when the connecting rod 120 is rotated to contact the second metal sheet 220 and the second sensing group 240, it is determined that the coaxial light source 40 is located right below the ring-shaped light source 30, and the control unit 300 can control the coaxial light source 40 to be in the operating state according to the state of the second sensing group 230; when the second metal sheet 220 is separated from the second sensing group 240, the coaxial light source 40 is in an unusable state; this can reduce the possibility of the coaxial light source 40 being used erroneously. In some examples, the coaxial light source 30 and the annular light source 30 may be moved together as a unit when the coaxial light source 40 is in the second position.

In some examples, the first metal sheet 210 and the second metal sheet 220 may be metal sheets of any shape, for example, rectangular, circular, square, or irregular patterns.

In some examples, the first sensing group 230 may include two contacts having elasticity, and the two contacts of the first sensing group 230 contact the first metal sheet 210 to communicate with the first sensing group 230. In some examples, the second sensing group 240 may include two contacts having elasticity, and the two contacts of the second sensing group 240 contact the second metal sheet 220 to communicate with the second sensing group 240. In this case, the position of the coaxial light source 40 can be determined by determining whether the first sensing group 230 and the second sensing group 240 are connected, and if the first sensing group 230 is connected, the coaxial light source 40 is maximally away from the position right below the ring light source 30, and the control part 300 can control the ring light source 30 to freely move up and down; if the second sensing group 240 is connected, the coaxial light source 40 is located right below the annular light source 30 at this time, and the control part 300 can control the coaxial light source 40 to be in the working state; if neither the first sensing group 230 nor the second sensing group 240 is connected, the coaxial light source 40 is located at the middle position, and the control portion 300 controls the ring light source 30 not to descend and controls the coaxial light source 40 to be in the non-operating state.

In the present embodiment, the position of the coaxial light source 40 is changed by rotating the connecting rod 120, and when the coaxial light source 40 is located at the first position, the first sensing group 230 contacts the first metal sheet 210 to connect the first sensing group 230, and the control part 300 enables the ring-shaped light source 30 to freely move up and down based on the control signal that the first sensing group 230 is connected; when the coaxial light source 40 is located at the second position, the second sensing group 240 contacts the second metal sheet 220 to connect the second sensing group 240, the control portion 300 makes the coaxial light source 40 in a normal operating state based on the control signal that the second sensing group 240 is connected, and since the first sensing group 230 is not conducted at this time, the ring-shaped light source 30 is locked and cannot descend alone; when the coaxial light source 40 is located at the third position, since neither the first sensing set 230 nor the second sensing set 240 is connected, the ring light source 30 is locked and the coaxial light source 40 is in the non-operating state. In this case, regardless of whether the coaxial light source 40 is in the first position, the second position, or the third position, the annular light source 30 can be protected from collision with the coaxial light source 40 as much as possible.

While the present invention has been described in detail in connection with the drawings and examples, it is to be understood that the above description is not intended to limit the invention in any way. Those skilled in the art can modify and change the present invention as necessary without departing from the spirit and scope of the present invention, and such modifications and changes are intended to fall within the scope of the present invention.

Claims (10)

1. A protection device capable of enabling a coaxial light source to rotate is used for a measuring instrument and protects a ring-shaped light source of the measuring instrument, and is characterized by comprising a fixing part, an induction part and a control part, wherein the fixing part is used for arranging the coaxial light source on the measuring instrument, the induction part is arranged on the fixing part, the fixing part comprises a fixing seat arranged on the measuring instrument, and a connecting rod is connected with the coaxial light source and is rotatably arranged on the fixing seat; the induction part comprises a first metal sheet arranged on the connecting rod and a first induction group arranged on the fixed seat; the control part is connected with the first induction group to control the motion state of the annular light source.

2. The protection device of claim 1,

the fixing seat comprises a bottom plate arranged on the measuring instrument, a first side plate and a second side plate, wherein the first side plate and the second side plate are formed on the bottom plate and arranged on two opposite sides of the bottom plate, and the bottom plate, the first side plate and the second side plate form a groove which enables the connecting rod to be rotatably arranged on the fixing seat.

3. The protection device of claim 2,

one end of the groove is provided with an inclined surface matched with the connecting rod.

4. The protection device of claim 3,

the connecting rod include with recess assorted first end, be used for connecting coaxial light source just is rectangular form second end and is used for connecting first end with the second end just have with the intermediate part of inclined plane assorted medial surface.

5. A protection device according to claim 4,

still including being used for connecting the fixing base with the connecting axle of connecting rod, first curb plate have with the first through-hole of connecting axle assorted, the second curb plate have with connecting axle assorted second through-hole, first tip have with connecting axle assorted third through-hole, the connecting axle passes first through-hole the third through-hole and the second through-hole is in order to incite somebody to action the connecting rod is rotationally fixed in the fixing base.

6. The protection device of claim 2,

the induction part is arranged on the connecting rod and comprises a second metal sheet and a second induction group, the second metal sheet is arranged on the connecting rod, the second induction group is arranged on the fixing seat, and the control part is connected with the second induction group to control the working state of the coaxial light source.

7. A protection device according to claim 6,

the bottom plate is provided with a fourth through hole for arranging the first induction group and a fifth through hole for arranging the second induction group, and the fourth through hole and the fifth through hole are symmetrically arranged relative to the center of the bottom plate.

8. The protection device of claim 6,

the first metal sheet and the second metal sheet are arranged on two opposite sides of the connecting rod.

9. The protection device of claim 6,

the first induction group comprises two elastic contacts, and the two contacts of the first induction group are in contact with the first metal sheet to be communicated with the first induction group;

the second induction group comprises two elastic contacts, and the two contacts of the second induction group are in contact with the second metal sheet to be communicated with the second induction group.

10. The protection device of claim 6,

the first induction group is a rotation starting point of the connecting rod when being contacted with the first metal sheet, and the second induction group is a rotation end point of the connecting rod when being contacted with the second metal sheet; or the first sensing group is the rotation end point of the connecting rod when in contact with the first metal sheet, and the second sensing group is the rotation starting point of the connecting rod when in contact with the second metal sheet.

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