CN217085389U - Pyramid prism fixing device - Google Patents

Abstract

The utility model provides a pyramid prism fixing device, which comprises a clamp for clamping the pyramid prism, a base with a hollow cavity and a pressing ring, wherein the pressing ring, the clamp and the pyramid prism are all arranged in the hollow cavity of the base, the pressing ring is pressed against one end of the clamp, and the other end of the clamp is pressed against the ridge line of the right-angle surface of the pyramid prism; the outer peripheral surface of the clamp is provided with at least one first limiting part, and the cavity of the base is internally provided with at least one second limiting part; the first limiting part is matched with the second limiting part and used for limiting the circumferential rotation of the clamp. The utility model discloses a cooperation of the spacing portion of second that sets up on first spacing portion on the anchor clamps and the base, the friction that produces the rotary motion of circumference and bring when having fully avoided sectional fixture and corner cube prism makes corner cube prism produce the problem of mar to the technological effect of guarantee corner cube prism life and applied precision has been realized.

Description

Pyramid prism fixing device

Technical Field

The utility model relates to an optical assembly technical field, concretely relates to pyramid prism fixing device.

Background

The pyramid prism is an optical element capable of reflecting incident light back in an almost parallel manner, has three light reflecting surfaces with extremely high mutual perpendicularity and a bottom surface, and is correspondingly formed with three edge lines instead of a common oblate lens, and the shape of the pyramid prism is determined to be more special by the function of the pyramid prism.

At present, the existing fixing mode of the pyramid prism adopts adhesive glue fixing or special device fixing. For example, chinese patent CN2009100678875 discloses a pyramid prism fixing device, which comprises a clamp, a base and a lock nut; the fixture is internally provided with a hollow hole for placing the pyramid prism, and the external thread of the locking nut is used for tightly jacking the pyramid prism. The patent has the following technical problems: 1. when lock nut screwed hard at the tight pyramid prism in top, because lock nut and the outer peripheral face of anchor clamps are the contact of point on the smooth surface only, can drive the pyramid prism and rotate together inevitable, cause the surface of pyramid prism to produce the mar because of the friction that the rotation brought, cause the damage to the pyramid prism, influence its optical characteristic to life has been shortened. 2. Because anchor clamps and pyramid prism are put into the base and probably are produced rotatoryly, consequently be difficult to confirm the accurate position of pyramid prism crest line in the base, and then when putting the device whole into optical path system and use, can't confirm its emergent ray's angle according to the state of base installation, increase the difficulty of debugging the light path. 3. When the fastening screw butt is tightened on the periphery smooth surface of the clamp, the stress balance of the whole circumferential direction of the clamp is difficult to guarantee, the axis deviation of the pyramid prism and the base is easily caused, and the accuracy of the whole external optical system is influenced when the clamp is used.

Therefore, it is necessary for those skilled in the art to develop a pyramid prism fixing device capable of ensuring the service life and application accuracy of the pyramid prism.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve at least one problem that exists, the embodiment of the utility model provides a pyramid prism fixing device, the spacing portion of cooperation that sets up through the outer peripheral face of anchor clamps and base intracavity prescribes a limit to the anchor clamps can not produce circumferential rotary motion, and then the technical problem who influences pyramid prism's life and application precision because of anchor clamps rotation bring among the prior art is solved.

In order to achieve the purpose, the embodiment of the utility model discloses a pyramid prism fixing device, which comprises a clamp for clamping the pyramid prism, a base with a hollow cavity and a pressing ring, wherein the pressing ring, the clamp and the pyramid prism are all arranged in the hollow cavity of the base, the pressing ring is abutted against one end of the clamp, and the other end of the clamp is abutted against the ridge line of the right-angle surface of the pyramid prism; the outer peripheral surface of the clamp is provided with at least one first limiting part, and the cavity of the base is internally provided with at least one second limiting part; the first limiting part is matched with the second limiting part and used for limiting the circumferential rotation of the clamp.

Furthermore, the first limiting part is a limiting groove, the second limiting part comprises a limiting hole and a fixing piece screwed in the limiting hole, and the fixing piece is located in the limiting groove.

Furthermore, the limiting groove comprises a groove bottom, a first groove wall and a second groove wall, and the stopping piece is abutted or clamped on the first groove wall and the second groove wall.

Furthermore, the first limiting part and the second limiting part are matched complementary structures.

Furthermore, the first limiting part and the second limiting part are of concave-convex structures matched with each other, namely, the complementary structure is of a concave-convex structure, and the groove and the bump are matched with each other.

Further, the cross section of the concave-convex structure is wedge-shaped.

Furthermore, the first limiting part and the second limiting part are both bump structures, and the bump structures of the first limiting part and the second limiting part are arranged in a staggered mode.

Furthermore, one end of the base is provided with an end face with a hollow hole, the bottom face of the pyramid prism is abutted to the end face, and the diameter of an inscribed circle of the hollow hole is smaller than that of an external circle of the bottom face of the pyramid prism.

Furthermore, the clamping ring is a hollow stud provided with an external thread, and an internal thread matched with the external thread is arranged in a cavity at one end of the base.

Furthermore, the diameter of an inscribed circle enclosed by the second limiting part in the cavity of the base is not less than the diameter of the bottom surface of the pyramid prism.

The utility model has the advantages that:

when the pressing ring is installed for rotating and pressing, the utility model is matched with the first limit part on the clamp and the second limit part in the base cavity for use, thereby fully avoiding the clamp and the pyramid prism from generating circumferential rotation motion, further solving the problem that the friction caused by the circumferential rotation of the pyramid prism generates scratches, avoiding damaging the optical characteristics of the pyramid prism and prolonging the service life of the pyramid prism; and through the cooperation of first spacing portion and second spacing portion, the atress is balanced on the circumferencial direction, can not cause the axle center skew of corner cube prism and base, avoids influencing outside whole optical system's accuracy.

Meanwhile, when the fixture is assembled with the pyramid prism, the position of the pyramid prism in the fixture is fixed, so that the ridge of the pyramid prism is always fixed relative to the first limiting part on the fixture, the first limiting part is matched with the second limiting part in position, and if the position of the second limiting part in the cavity of the base is marked on the outer surface of the base, the position of the ridge of the pyramid prism can be indirectly indicated. When the device is integrally placed in a light path system for use, the angle of emergent light can be determined according to the installation state and the identification of the base, so that the light path can be debugged accurately.

Drawings

The following drawings are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, and are provided for illustrative purposes only and are not intended to limit the scope of the invention. In the drawings:

FIG. 1 is a schematic view of an embodiment of a pyramid prism fixture assembly;

FIG. 2 is a schematic cross-sectional view taken along A-A in FIG. 1;

fig. 3 is an exploded view of a cube-corner prism fixture according to an embodiment of the present disclosure;

FIG. 4 is a schematic front view of a clamp according to another embodiment of the present application;

FIG. 5 is a schematic view of the assembly of the pyramid prism fixture in another embodiment of the present application;

FIG. 6 is a schematic cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a schematic front view of a base according to another embodiment of the present application;

FIG. 8 is a schematic front view of a base according to another embodiment of the present application;

FIG. 9 is a front view of a clamp according to another embodiment of the present application;

fig. 10 is a schematic view of a fitting structure of a clamp and a base according to another embodiment of the present application.

Reference numerals:

1. a clamp; 10. a hollow structure; 11. a first limiting part; 11', a groove; 12. a bump; 100. the outer peripheral surface of the clamp; 110. the bottom of the tank; 111. a first slot wall; 112. a second slot wall; 2. a pyramid prism; 21. the edge line of the pyramid prism; 22. the bottom surface of the pyramid prism; 3. a base; 30. a second limiting part; 30', a second bump; 31. a hollow cavity; 301. a limiting hole; 302. a stop bolt; 303. another bump; 311. a base end face; 312. a hollow bore; 4. pressing a ring; 41. and a screwing part.

Detailed Description

The following will disclose several embodiments of the present application with drawings, clearly and completely describe the technical solution of the present invention, and a part of the drawings of the specification constituting the present application is used to provide further understanding of the present invention, and the exemplary embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative work are included in the scope of the present invention.

It should be noted that, unless the directions indicated are individually defined, the directions of up, down, left, right, etc. referred to herein are based on the directions of up, down, left, right, etc. shown in fig. 1 of the embodiment of the present application, and if the specific posture is changed, the directional indication is changed accordingly. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Further, in the various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.

In the present application, the terms "connected" and "fixed" are to be construed broadly and, for example, "connected" may be a fixed connection, a removable connection, or a combination thereof, unless expressly stated or limited otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory to each other or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the scope of the present invention.

Example one

Referring to fig. 1 to 3, the pyramid prism fixing device in the present embodiment includes a clamp 1, a base 3, and a pressing ring 4; the fixture 1 has the function of clamping the pyramid prism 2, namely, the ridge line 21 of the pyramid prism is abutted against the hollow structure 10 of the fixture, the diameter of the circumscribed circle of the hollow structure 10 is smaller than the diameter of the bottom surface of the pyramid prism, and the fixture cannot damage three mutually vertical light reflecting surfaces and coating layers of the pyramid prism 2; the base 3 is a cylinder with a hollow cavity 31, one end of the base is provided with an end face (a base end face 311) of a hollow hole 312, the other end of the base is provided with an internal thread matched with the external thread of the pressing ring 4, the pressing ring 4 is a hollow stud, the hollow stud is provided with a screwing part 41 for facilitating fastening operation, and the pressing ring is screwed in the screwing part 41 through a special wrench.

As shown in fig. 2, the pyramid prism 2, the fixture 1, and the pressing ring 4 are sequentially placed in the cavity of the base 3, and then screwed with the internal thread of the base 3 through the pressing ring 4 with external thread, the pressing ring 4 abuts on one end of the fixture 1, the other end of the fixture abuts on the ridge line of the right-angled surface of the pyramid prism, the bottom surface 22 of the pyramid prism abuts on the base end surface 311, and the diameter of the inscribed circle of the hollow hole 312 in the base end surface is smaller than the diameter of the circumscribed circle of the bottom surface of the pyramid prism. The hollow hole in the present embodiment is preferably, but not limited to, a circular hole, and may be a polygonal hole or a special-shaped hole as long as the bottom surface of the pyramid prism can be blocked.

In addition, as shown in fig. 2 and fig. 3, the greatest improvement of this embodiment over the prior art is to avoid the circular rotation motion (i.e., circumferential motion) of the fixture and the corner cube prism caused by the screwing of the pressing ring 4, specifically, at least one first limiting portion 11 is disposed on the outer circumferential surface 100 of the fixture 1, and a second limiting portion 30 corresponding to the first limiting portion 11 is disposed in the cavity of the base 3.

In this embodiment, the preferred but not limited to two first limiting parts are taken as an example, and certainly, the effect of avoiding the circular rotation motion can be achieved by arranging one first limiting part, and for better avoiding the rotation of the fixture, the number and the distribution positions of the first limiting part and the second limiting part can be set according to actual conditions.

According to the technical scheme of the embodiment, firstly, the ridge of the pyramid prism abuts against the clamp, then the ridge of the pyramid prism is installed in the base with the hollow cavity, at the moment, the clamp is limited to move only along the axial direction through the matching of the first limiting part on the clamp and the second limiting part on the base, the circumferential rotary motion cannot be generated, and then the pressing ring used for controlling the axial position of the pyramid prism is used for rotationally pressing. Therefore, the first limiting part on the clamp and the second limiting part on the base are arranged, so that the problem that the clamp and the pyramid prism generate circumferential rotation motion to cause friction and generate scratches is fully avoided, the optical characteristics of the pyramid prism are prevented from being damaged, and the service life of the pyramid prism is prolonged; and through the cooperation of first spacing portion and second spacing portion, the atress is balanced on the circumferencial direction, can not cause the axle center skew of corner cube prism and base, avoids influencing outside whole optical system's accuracy.

Example two

Referring to fig. 2 and 3, the present embodiment is based on the first embodiment, and as a preferred implementation manner, the first position-limiting portion 11 in the present embodiment is a position-limiting groove with one end penetrating or both ends penetrating, the second position-limiting portion 30 is a position-limiting hole 301 corresponding to the position-limiting groove and a stop bolt 302 screwed into the position-limiting hole 301, and the stop bolt 302 is screwed into the base in a countersunk manner and extends out of the inner wall of the base. When the fixing bolt 302 is installed, the part protruding out of the cavity slides into the limit groove through the through hole. The locking piece in this embodiment is preferably but not limited to a locking bolt, and in addition, the diameter of the outer circle of the locking bolt 302 is preferably equal to the width of the limiting groove, so that the clamp can be better guaranteed to be prevented from generating circular rotation motion. In the process of screwing the pressing ring 4, a certain gap distance is reserved between the stop bolt 302 and the groove bottom 110 of the limiting groove, so that the fixture and the pyramid prism can be further freely moved along the axial direction, the pressure of the stop piece on the fixture can be conveniently adjusted subsequently, and the application precision of the pyramid prism can be ensured.

Furthermore, in the embodiment, the first groove wall 111 and the second groove wall 112 of the limiting groove are preferably but not limited to be parallel to each other and are respectively perpendicular to the groove bottom 110 (the two groove walls may also be not parallel), the design of the feature structure facilitates the good matching between the limiting groove and the second limiting portion 30, further prevents the fixture and the pyramid prism from generating circular rotation motion, and achieves the beneficial effects of prolonging the service life of the pyramid prism and ensuring the application accuracy of the pyramid prism. Meanwhile, when the fixture is assembled with the pyramid prism, the position of the pyramid prism in the fixture is fixed, so that the relative position of the ridge line of the pyramid prism and the first limiting part is always fixed, and the first limiting part is matched with the second limiting part in position; the second position-limiting part, namely the position-limiting hole 301 and the stop bolt 302 screwed in the position-limiting hole 301, indicates the position of the second position-limiting part in the cavity on the outer surface of the base, and indirectly indicates the position of the edge line of the pyramid prism. When the device is integrally placed in an optical path system for use, the angle of the emergent light of the pyramid prism can be determined according to the installation state of the base and the position of the limiting hole 301 or the stop bolt 302 on the base, so that the light path can be accurately debugged.

EXAMPLE III

As shown in fig. 4, a schematic front view structure of the clamp in the present embodiment is different from the first and second embodiments in the number of the first limiting portions and the number of the corresponding second limiting portions, and the other structures are the same as the first and second embodiments, which is a preferred embodiment. The number of the first position-limiting portions 11 of the clamp 1 in this embodiment is designed to be six, and the first position-limiting portions are uniformly distributed along the circumference, and the number of the first position-limiting portions corresponding to the second position-limiting portions is also six.

Of course, this embodiment can fully explain that the quantity of the spacing portion of first and the quantity of the spacing portion of second that corresponds designs into six, can realize avoiding anchor clamps and corner cube prism to produce circular rotation motion, reaches the beneficial effect that promotes guarantee corner cube prism life. That is, not limited to two of the first embodiment and six of the first embodiment, the number of the first position-limiting portions and the number of the corresponding second position-limiting portions may be specifically designed according to the size of the circumference of the fixture and the base in practical situations, and may be three, four, five, eight, ten, twelve or more.

Example four

As shown in fig. 5 to 7, as another embodiment of the present application, another embodiment of the pyramid prism fixing device is described, and in this embodiment, on the basis of the first embodiment, the second embodiment and the third embodiment, different from the second embodiment and the third embodiment, the first limiting portion in this embodiment is the groove 11 ', the second limiting portion 30 is another bump 303 corresponding to the groove 11 ' and disposed in the hollow cavity 31 of the base, and the another bump 303 abuts against the groove 11 ', or a structure such as a buckle is disposed on the groove 11 ' and/or the another bump 303, so that the another bump 303 is snapped into the groove 11 ', and other structures are the same as the second embodiment and the third embodiment.

It should be noted that the end of the groove near the corner cube prism in this embodiment is through, which facilitates the implementation of the other protrusion 303 on the base being able to enter into the groove. Furthermore, a plurality of other bumps 303 are arranged in the hollow cavity 31 of the base, and the diameter of an inscribed circle formed by enclosing the plurality of other bumps 303 is not less than the diameter of the bottom surface of the pyramid prism, so that the pyramid prism can smoothly enter the base.

In this embodiment, the first position-limiting portion may be designed as a protrusion, and the second position-limiting portion may be designed as another groove adapted to the protrusion; or, with reference to the schematic front view structure diagram of the fixture shown in fig. 9, the first position-limiting portion is designed as a staggered combination of the groove 11' and the bump 12, and the second position-limiting portion is designed as a staggered combination corresponding to another bump and another groove. That is, the first position-limiting portion and the second position-limiting portion may be designed to have corresponding complementary structures. Need not to install fastening screw in addition for prior art again, direct assembly, two spacing portions of matched with still have the guide effect, and installation, dismantlement are convenient stable, do benefit to and reach the beneficial effect who promotes guarantee pyramid prism life and guarantee its application precision. Meanwhile, when the fixture is assembled with the pyramid prism, the position of the pyramid prism in the fixture is fixed, so that the ridge of the pyramid prism is always fixed relative to the first limiting part, the first limiting part is matched with the second limiting part in position, the position of the second limiting part in the cavity of the base can be marked on the outer surface of the base, and the position of the ridge of the pyramid prism can be indirectly indicated. When the device is integrally placed in a light path system for use, the angle of emergent light can be determined according to the installation state and the identification of the base, so that the light path can be debugged accurately. The mark may be a printed dot, line, or scribed line, and in addition, the first limiting portion and the second limiting portion (the bump and/or the groove) on the fixture in this embodiment may be marked, or the matching size of the first limiting portion and the second limiting portion may be set to different sizes, so as to indicate the uniqueness of the positions of the fixture and the corner cube prism, and further facilitate ensuring the position of the edge line or the axis of the corner cube prism.

It should be further noted that the groove in the present embodiment is preferably not limited to a wedge-shaped groove, and the protrusion is preferably not limited to a wedge-shaped block matched with the wedge-shaped groove. That is, the cross-sectional shapes of the projections and the grooves may be trapezoidal, triangular, square, rectangular, dovetail, or the like, and may be set according to design requirements. The wedge-shaped groove and the corresponding wedge-shaped block are preferably selected, the assembling process is smoother and more convenient due to the design of the characteristic structure, and locking force exists between the clamp and the base after the assembly, so that the requirement on the pressing force of the pressing ring can be reduced, the bottom surface of the pyramid prism cannot be damaged, and the beneficial effects of ensuring the service life of the pyramid prism and ensuring the application precision of the pyramid prism can be further favorably achieved.

Furthermore, as shown in fig. 7, the number of the other bumps 303 in the base of the present embodiment is preferably, but not limited to, two; referring to fig. 9, the relative height of the other protrusion 303 in the base is not greater than the depth of the groove 11' on the fixture, and the length of the other protrusion 303 along the axial direction is not greater than the length of the groove along the axial direction, so as to facilitate the fixture and the pyramid prism to move freely along the axial direction. In addition, the width of another bump 303 is preferably almost equal to the groove width of the groove 11', so that the fixture can be prevented from generating circular rotation motion, and the beneficial effect of prolonging the service life of the pyramid prism can be ensured.

EXAMPLE five

As shown in fig. 8, a front view structural diagram of the base in the present embodiment is different from the fourth embodiment in the number of the first position-limiting portions and the number of the corresponding second position-limiting portions, and the other structures of the present embodiment are the same as the fourth embodiment. In this embodiment, the number of the other protrusions 303 disposed in the hollow cavity 31 of the base 3 is four, and the protrusions are uniformly distributed along the circumference, and the number of the first limiting portions of the fixture 1 is also four.

It should be noted that, this embodiment can fully explain that the quantity of the spacing portion of first spacing portion and the quantity design of the spacing portion of second that corresponds is four, can realize avoiding anchor clamps and pyramid prism to produce circular rotation motion, reaches the beneficial effect that promotes guarantee pyramid prism life. That is, the second position-limiting portions of the base in the fourth embodiment are not limited to two other bumps 303 and four other bumps 303 in the present embodiment, the number of the first position-limiting portions and the number of the corresponding other bumps can be specifically designed according to the size of the circumference of the fixture and the base in practical situations, and may be three, five, eight, ten, twelve or more.

EXAMPLE six

As shown in fig. 10, in this embodiment, on the basis of the first embodiment, as a preferred implementation manner, the first limiting portion in this embodiment is a first bump 11", the second limiting portion is a second bump 30", the first bump and the second bump are of the same or different bump structures, and the bump structures of the first bump and the bump structures of the second bump are placed in a staggered manner. In the present embodiment, three sets of the matching limiting portions are taken as an example, but not limited to three sets, and the pressing ring is taken as an example of counterclockwise rotation. In combination with the structure shown in fig. 10, the first protrusions 11 "of the upper set of matching limiting portions abut against the right of the second protrusions 30", and the first protrusions 11 "of the right set of matching limiting portions abut against the upper of the second protrusions 30", so that the protrusions of the two sets of matching limiting portions are arranged in a staggered manner, and thus, the characteristic design of staggered arrangement can realize mutual clamping when the clamp and the base are installed, prevent the clamp from accidentally rotating before the clamping ring is tightened, and further facilitate accurate positioning of the clamp 1.

It should be noted that the clamps in the above embodiments are preferably made of duralumin material which is light in weight, high in mechanical strength, and not easily deformed. The clamp and the base are preferably but not limited to the structural shapes of the above embodiments, and may also have other structural variations, for example, the cross section of the internal hollow structure of the clamp may be circular, regular triangle, regular dodecagon, and other cross-sectional shapes capable of clamping the corner cube; the profile of the clamp is preferably but not limited to the cylinder of the above embodiment, and may also be a cube, a cuboid, etc., the inner hole of the base matched with the clamp is also a corresponding shape, and the profile of the base is preferably but not limited to the cylinder of the embodiment, and may also be a cuboid, etc. As long as the fixing device who is provided with the first spacing portion of avoiding producing circular rotary motion on the anchor clamps of putting into the base has all fallen within the scope of protection of this application.

To sum up, through the utility model discloses a pyramid prism fixing device simply introduces down theory of operation wherein:

firstly, three edge lines of the pyramid prism are abutted against the hollow structure of the clamp and then are integrally placed into a base with a hollow cavity, or

Placing the pyramid prism and the clamp into the base in sequence to enable three ridge lines of the pyramid prism to abut against the hollow structure of the clamp;

then, the pressing ring is screwed at the port of the base, and the clamp is pressed. At the moment, the first limiting part on the clamp is matched with the second limiting part on the base to limit that the clamp and the corner cube prism cannot generate circumferential rotary motion

Therefore, the utility model discloses a setting of the spacing portion of second on first spacing portion on the anchor clamps and the base, and then fully avoided anchor clamps and corner cube prism to produce the rotary motion of circumference and the friction that brings produces the problem of mar to realized guarantee corner cube prism life's technological effect.

While the above description shows and describes the preferred embodiments of the application, it is to be understood, as noted above, that the application is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the subject matter disclosed above, as determined by the teachings or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims (10)

1. A pyramid prism fixing device comprises a clamp for clamping a pyramid prism, a base with a hollow cavity and a pressing ring, wherein the pressing ring, the clamp and the pyramid prism are all arranged in the hollow cavity of the base,

the pressing ring is abutted against one end of the clamp, and the other end of the clamp is abutted against a ridge of a right-angle surface of the pyramid prism;

the outer peripheral surface of the clamp is provided with at least one first limiting part, and the cavity of the base is internally provided with at least one second limiting part; the first limiting part is matched with the second limiting part and used for limiting the circumferential rotation of the clamp.

2. The cube-corner prism fixing device according to claim 1, wherein the first position-limiting portion is a position-limiting groove, the second position-limiting portion comprises a position-limiting hole and a fixing member screwed into the position-limiting hole, and the fixing member is located in the position-limiting groove.

3. The cube-corner prism fixing device according to claim 2, wherein the limiting groove comprises a groove bottom, a first groove wall and a second groove wall, and the stop member abuts against or is engaged with the first groove wall and the second groove wall.

4. The cube-corner prism fixture according to claim 1, wherein the first position-limiting portion and the second position-limiting portion are complementary structures.

5. The cube-corner prism fixing device according to claim 4, wherein the first position-limiting portion and the second position-limiting portion are of a matched concave-convex structure.

6. The corner cube prism fixture according to claim 5, wherein the relief structure has a wedge-shaped cross-section.

7. The cube-corner prism fixing device according to claim 1, wherein the first position-limiting portion and the second position-limiting portion are both bump structures, and the bump structures of the first position-limiting portion and the second position-limiting portion are disposed in a staggered manner.

8. The pyramid prism fixture of claim 1, wherein one end of the base is configured as an end surface having a hollow hole, a bottom surface of the pyramid prism abuts on the end surface, and an inscribed circle diameter of the hollow hole is smaller than an outer inscribed circle diameter of the bottom surface of the pyramid prism.

9. The cube-corner prism fixing device according to claim 1, wherein the pressing ring is a hollow stud provided with an external thread, and an internal thread matching the external thread is provided in an end cavity of the base.

10. The cube-corner prism fixture according to claim 1, wherein the diameter of the inscribed circle enclosed by the second position-limiting portion in the cavity of the base is not smaller than the diameter of the bottom surface of the cube-corner prism.

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