CN112269259B

CN112269259B - Magnifying lens capable of realizing multiple times of number conversion

Info

Publication number: CN112269259B
Application number: CN202011153904.XA
Authority: CN
Inventors: 夏瑞静; 林娜; 项文力; 毛欣杰; 吕帆
Original assignee: Eye Hospital of Wenzhou Medical University
Current assignee: Eye Hospital of Wenzhou Medical University
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2022-02-18
Anticipated expiration: 2040-10-26
Also published as: CN112269259A

Abstract

The invention discloses a magnifying lens capable of realizing multiple times of conversion, which comprises a shell and a lens body, wherein the lens body comprises a lens and a connecting handle connected to the lens, a plurality of positioning holes for positioning the lens body are formed in the shell, the positioning holes are uniformly distributed at intervals along the length direction of the shell, the lens body is respectively fixed in the positioning holes through connecting rods, an orientation mechanism and a locking hole are formed in the shell, a slide rail assembly is arranged on the shell, the slide rail assembly comprises a vertical slide rail and a plurality of transverse slide rails, one end of the vertical slide rail extends to an observation end and is communicated with the locking hole, and a locking mechanism for fixing the use position of the lens body is arranged on the observation end; the mirror body can slide from the positioning hole to the locking hole on the observation end through the sliding rail assembly and is locked in the positioning hole for use. When the magnifying glass is used, the convex lens can be switched to magnify an observed object at different magnifications, and an observer can clearly observe the object by using the magnifying glass with proper magnifications.

Description

Magnifying lens capable of realizing multiple times of number conversion

Technical Field

The invention relates to the technical field of ophthalmic lens medical instruments, in particular to a magnifying lens capable of realizing multiple times of conversion.

Background

Magnifier, a simple visual optic used to view minute details of an object, is a converging lens with a focal length much smaller than the eye's apparent distance. The size of an object imaged on the retina of a human eye is proportional to the angle (viewing angle) an object is at to the eye.

The larger the viewing angle, the larger the image, the more detail of the object can be resolved. Moving closer to the object increases the viewing angle but is limited by the ability of the eye to focus. The magnifying glass is used to make it close to the eyes, and the object is placed in the focal point of the magnifying glass to form an erect virtual image. The magnifying glass has the function of magnifying the visual angle. The first observation method is that the magnifier is close to an object to be observed, the object to be observed is fixed, the distance between human eyes and the object to be observed is not changed, and then the handheld magnifier is moved back and forth between the object and the human eyes until the image is large and clear. And the second observation method is that the magnifier is as close to the eyes as possible. The magnifier is fixed, and the object is moved until the image is large and clear.

The prior magnifier has the following defects:

firstly, because a magnifying glass is only provided with a convex lens, the magnification of the magnifying glass is limited, when an observed object is large, the visual field observed by an observer is small, the observer needs to spend a long time for observing, and when the observed object is small, the observer cannot observe an object more clearly because the magnification is small.

Secondly, the magnifying glass is generally placed in a pocket of the clothes or a carry-on bag by an observer, and if the magnifying glass is stored in the pocket of the clothes, the magnifying glass easily falls out of the pocket to cause loss in the walking process of the observer; if the magnifier is stored in the carry-on bag, the magnifier stored in the carry-on bag can be mixed with other objects in the carry-on bag in the walking process of an observer, and the magnifier needs to be turned out from the carry-on bag when the observer needs to take out the magnifier for use, so that the time of the observer is consumed.

Disclosure of Invention

The invention aims to provide a magnifying lens capable of converting multiple times, which is provided with a plurality of convex lenses with different magnifications, when the magnifying lens is used, the convex lenses can be converted to realize the magnification of an observed object with different magnifications, and an observer can clearly observe the object by using the magnifying lens with proper magnifications.

In order to realize the purpose of the invention, the invention adopts the following technical scheme: a magnifying lens capable of realizing multiple times of conversion comprises a shell and a plurality of lens bodies with different magnification factors, wherein each lens body comprises a lens and a connecting handle connected to the lens, a plurality of positioning holes used for positioning the lens bodies are formed in the shell, the positioning holes are uniformly distributed at intervals along the length direction of the shell, the lens bodies are respectively fixed in the positioning holes through connecting rods, an orientation mechanism used for preventing the connecting rods from rotating and randomly moving in the positioning holes is arranged in the shell, and the orientation mechanism ensures that the plurality of lenses fixed on the shell are arranged in parallel;

the shell comprises an observation end and a gripping end, a slide rail assembly is arranged on the shell and comprises a vertical slide rail and a plurality of transverse slide rails, the transverse slide rails are arranged corresponding to the positioning holes, the transverse slide rails are arranged on one side provided with the positioning holes, and the vertical slide rails are arranged on the adjacent sides of the side surfaces provided with the positioning holes; the transverse slide rail is arranged in a direction vertical to the length direction of the shell, and the vertical slide rail is arranged along the length direction of the shell; one end of the transverse slide rail is communicated with the positioning hole, and the other end of the transverse slide rail extends to the adjacent side surface and is communicated with the vertical slide rail;

the observation end is provided with a locking hole for ensuring that the lens body is in the use position, one end of the vertical slide rail extends to the observation end and is communicated with the locking hole, and the observation end is provided with a locking mechanism for fixing the lens body in the use position; the mirror body can slide from the positioning hole to the locking hole on the observation end through the sliding rail assembly and is locked in the positioning hole for use.

Compared with the prior art, the magnifier adopting the technical scheme and capable of realizing multiple times of number conversion has the following beneficial effects:

firstly, the magnifying lens capable of realizing multiple times of number conversion can be used for carrying a plurality of magnifying lenses with different magnification times at one time, and is convenient and quick.

And secondly, the magnification of the magnifying glass can be freely converted among different magnification factors, and the method is suitable for various scenes.

Thirdly, through the magnifying glass multiple that guide rail assembly can be quick will need to use, more accurate swift.

Preferably, the protective sleeve is sleeved on the outer side of the shell, and the open groove is formed along the length direction of the protective sleeve; a locking sliding groove arranged along the length direction is formed in the outer side of the shell, a sliding block is arranged in the protective sleeve, and the protective sleeve can be sleeved on the shell in a sliding mode along the length direction through the sliding block and the locking sliding groove; the protective sleeve is provided with a slot which is arranged along the length direction, the positioning hole on the shell is exposed outside through the slot, and the connecting handle penetrates through the slot and is arranged in the positioning hole.

Preferably, the protective sleeve further comprises a limit buckle, an opening in the protective sleeve for facilitating the shell to enter the protective sleeve is formed in the protective sleeve, the observation end of the shell is exposed out of the opening, the limit buckle is rotatably arranged on the opening, and when the shell is completely located in the protective sleeve, the limit buckle is buckled on the locking opening of the observation end.

Preferably, the limit buckle is provided with a limit block capable of limiting the rotation angle of the limit part relative to the protective sleeve, the limit block is positioned at the joint of the limit buckle and the protective shell, and the maximum rotation angle of the limit block is 90 degrees; the tip that vertical slide rail is close to the observation end continues to extend and forms the spacing groove, one side that the casing was pressed close to the spacing knot is equipped with the lug, when the relative casing of protective housing slides, the lug is in slide in the vertical slide rail to finally receive the restriction of spacing groove guarantees that the casing can't be followed complete roll-off in the protective sheath.

Preferably, the end part, far away from the opening, of the protective shell is provided with a pull groove convenient to pull, the gripping end of the shell is provided with a groove convenient to use, and the groove and the pull groove are correspondingly arranged.

Preferably, the bottom of the connecting handle is provided with a sliding part, the sliding part is provided with two symmetrically arranged orientation grooves, the orientation grooves are arranged along the length direction of the connecting soldier, and the connecting line of the two orientation grooves is perpendicular to the plane of the lens; the orientation mechanism comprises two orientation blocks, the orientation blocks are symmetrically arranged on the side wall of the location hole, and when the connecting handle is positioned in the location hole, the orientation blocks are positioned in the orientation grooves.

Preferably, the slide rail assembly further comprises an inner slide groove, and the inner slide groove is located at the bottom of the transverse slide rail and the bottom of the vertical slide rail; a sliding block is arranged at one end of the sliding piece, which is far away from the connecting handle, a connecting rod is arranged between the sliding block and the sliding piece, the sliding piece is positioned in the sliding rail component, and the sliding block is positioned in the inner sliding groove; one side of the orientation groove close to the sliding block is open, when the mirror body moves outwards along the length direction of the connecting handle, the orientation block leaves the orientation groove from one end of the orientation groove close to the sliding block, and the corresponding mirror body can slide into the sliding rail assembly from the positioning hole.

Preferably, the connecting rod is sleeved with a spring, and the spring is located in the inner sliding groove.

Preferably, locking mechanical system includes the locking piece, the one end that the slider is close to the sliding block is seted up the locking groove that two symmetries set up, and the line between two orientation grooves of line perpendicular to between two locking grooves passes through as corresponding mirror body slide rail set spare removes when in the locking hole, outwards stimulates the connecting rod, makes the locking piece inserts in the locking groove.

Preferably, the side edge of the lens, which is far away from the connecting handle, is provided with a signboard which is convenient for a user to recognize the magnification.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a magnifying glass capable of multiple times of conversion according to the present invention.

Fig. 2 is a schematic structural diagram of another angle of the magnifier capable of multiple times conversion in this embodiment.

Fig. 3 is a schematic view illustrating a state of the position-limiting buckle in the present embodiment when the position-limiting buckle is opened.

Fig. 4 is a schematic view illustrating the case body of the present embodiment sliding out of the protective case.

Fig. 5 is a schematic structural diagram of the housing and the mirror body in this embodiment.

Fig. 6 is a schematic structural view of the protective shell and the position-limiting buckle in this embodiment.

Fig. 7 is a schematic structural view of another angle between the protective shell and the position-limiting buckle in the embodiment.

Fig. 8 is a mechanism diagram of the housing in this embodiment.

Fig. 9 is a schematic view illustrating a state in which a mirror body slides in the slide rail assembly according to the present embodiment.

FIG. 10 is a schematic view of the structure of this embodiment with a mirror body slid to the viewing end.

FIG. 11 is a schematic view of the present embodiment with a mirror body sliding to the viewing end and the housing outside the protective cover.

Fig. 12 is a schematic structural diagram of the mirror body in the present embodiment.

FIG. 13 is a top view of the housing and crystal attachment of the present embodiment.

Fig. 14(a) - (c) are schematic diagrams of the movement process of the orientation mechanism.

Fig. 15(a) - (b) are schematic views showing the movement process of the locking mechanism.

Reference numerals: 1. a housing; 11. positioning holes; 12. an observation end; 13. a gripping end; 131. a groove; 14. a locking hole; 15. locking the chute; 2. a mirror body; 21. a lens; 22. a connecting handle; 31. an orientation block; 4. a slide rail assembly; 41. a vertical slide rail; 411. a limiting groove; 42. a transverse slide rail; 43. an inner chute; 51. a locking block; 6. a protective sleeve; 61. grooving; 62. a slider; 63. an opening; 64. groove drawing; 7. a limit buckle; 71. a limiting block; 72. a bump; 8. a slider; 81. a directional tank; 82. a slider; 83. a connecting rod; 84. a locking groove; 9. a spring; 91. a signboard.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

The magnifier as shown in fig. 1 to 15 and capable of performing multiple times of conversion comprises a shell 1 and a plurality of lens bodies 2 with different magnification factors, wherein each lens body 2 comprises a lens 21 and a connecting handle 22 connected to the lens 21, the shell 1 is provided with a plurality of positioning holes 11 used for positioning the lens bodies 2, the positioning holes 11 are uniformly distributed along the length direction of the shell 1 at intervals, the lens bodies 2 are respectively fixed in the positioning holes 11 through connecting rods 83, an orientation mechanism used for preventing the connecting rods 83 from rotating and randomly moving in the positioning holes 11 is arranged in the shell 1, and the orientation mechanism ensures that the plurality of lens bodies 21 fixed on the shell 1 are arranged in parallel.

The shell 1 comprises an observation end 12 and a gripping end 13, the shell 1 is provided with a slide rail assembly 4, the slide rail assembly 4 comprises a vertical slide rail 41 and a plurality of transverse slide rails 42, the transverse slide rails 42 are arranged corresponding to the positioning holes 11, the transverse slide rails 42 are arranged on one side provided with the positioning holes 11, and the vertical slide rails 41 are arranged on the adjacent sides of the side surfaces provided with the positioning holes 11; the transverse slide rail 42 is arranged perpendicular to the length direction of the shell 1, and the vertical slide rail 41 is arranged along the length direction of the shell 1; one end of the transverse slide rail 42 is communicated with the positioning hole 11, and the other end of the transverse slide rail 42 extends to the adjacent side surface to be communicated with the vertical slide rail 41.

A locking hole 14 for ensuring that the endoscope body 2 is in the use position is arranged on the observation end 12, one end of the vertical slide rail 41 extends to the observation end 12 and is communicated with the locking hole 14, and a locking mechanism for fixing the endoscope body 2 in the use position is arranged on the observation end 12; the mirror body 2 can slide from the positioning hole 11 to the locking hole 14 on the observation end 12 through the slide rail assembly 4, and can be locked in the positioning hole 11 for use.

The magnifier of the embodiment further comprises a protective sleeve 6 sleeved on the outer side of the shell 1, and the slot 61 is arranged along the length direction of the protective sleeve 6; a locking sliding groove 15 arranged along the length direction is formed in the outer side of the shell 1, a sliding block 62 is arranged in the protective sleeve 6, and the protective sleeve 6 can be slidably sleeved on the shell along the length direction through the sliding block 62 and the locking sliding groove 15; the protective sleeve 6 is provided with a slot 61 opened along the length direction, the positioning hole 11 on the shell 1 is exposed outside through the slot 61, and the connecting handle 22 is arranged in the positioning hole 11 through the slot 61.

The magnifying glass of this embodiment still includes limit buckle 7, and the opening 63 of casing 6 inside is got into to casing 1 of being convenient for on the protective sheath 6, and the observation end 12 of casing 1 exposes from opening 63, and limit buckle 7 rotatable setting is on opening 63, and when casing 1 was located protective sheath 6 completely, limit buckle 7 lock was on the locking mouth of observation end 12.

The limiting buckle 7 is provided with a limiting block 71 capable of limiting the rotation angle of the limiting member relative to the protective sleeve 6, the limiting block 71 is positioned at the joint of the limiting buckle 7 and the protective shell, and the maximum rotation angle of the limiting block 71 is 90 degrees; the tip that vertical slide rail 41 is close to observation end 12 continues to extend and forms spacing groove 411, and the limit buckle 7 is equipped with lug 72 next to one side of casing 1, and when the relative casing 1 of protective housing slided, lug 72 slided in vertical slide rail 41 to finally receive the restriction of spacing groove 411, guarantee that casing 1 can't follow protective sheath 6 and roll off completely.

The end of the protective shell far away from the opening 63 is provided with a pull groove 64 convenient for drawing, the gripping end 13 of the shell 1 is provided with a groove 131 convenient for the pull groove 64 to use, and the groove 131 and the pull groove 64 are correspondingly arranged.

The bottom of the connecting handle 22 is provided with a sliding part 8, the sliding part 8 is provided with two symmetrically arranged orientation grooves 81, the orientation grooves 81 are arranged along the length direction of the connecting soldier, and the connecting line of the two orientation grooves 81 is vertical to the plane of the lens 21; the orientation mechanism comprises two orientation blocks 31, the orientation blocks 31 are symmetrically arranged on the side wall of the location hole 11, and when the connecting handle 22 is positioned in the location hole 11, the orientation blocks 31 are positioned in the orientation grooves 81.

The slide rail assembly 4 further comprises an inner slide groove 43, and the inner slide groove 43 is positioned at the bottom of the transverse slide rail 42 and the vertical slide rail 41; one end of the sliding part 8, which is far away from the connecting handle 22, is provided with a sliding block 82, a connecting rod 83 is arranged between the sliding block 82 and the sliding part 8, the sliding part 8 is positioned in the sliding rail component 4, and the sliding block 82 is positioned in the inner sliding groove 43; the side of the orientation groove 81 close to the sliding block 82 is open, when the mirror body 2 moves outwards along the length direction of the connecting handle 22, the orientation block 31 leaves the orientation groove 81 from the end of the orientation groove 81 close to the sliding block 82, and the corresponding mirror body 2 can slide into the slide rail assembly 4 from the positioning hole 11.

The connecting rod 83 is sleeved with a spring 9, and the spring 9 is positioned in the inner sliding groove 43.

The locking mechanism comprises a locking block 51, one end of the sliding piece 8 close to the sliding block 82 is provided with two symmetrically arranged locking grooves 84, the connecting line between the two locking grooves 84 is perpendicular to the connecting line between the two orientation grooves 81, and when the corresponding mirror body 2 moves into the locking hole 14 through the sliding rail assembly 4, the connecting rod 83 is pulled outwards, so that the locking block 51 is inserted into the locking grooves 84.

The side of the lens 21 away from the connecting handle 22 is provided with a sign 91 for the user to recognize the magnification.

As shown in fig. 1 and fig. 2, the magnifier of this embodiment is in a storage state, at this time, all the mirror bodies 2 are located in the corresponding positioning holes 11, and the protective sleeve 6 is sleeved on the outer side of the housing 1, and the connecting rod 83 connected to the mirror bodies 2 receives a good limiting effect under the limitation of the open slot 61 of the protective sleeve 6. The slide member 8 and the slide block 82 connected to the connecting handle 22 are located in the positioning hole 11, and the sectional structure of the positioning hole 11 and the slide member 8 therein is shown in fig. 14(a), and the positioning block is locked in the positioning groove under the action of the spring 9 and the slide block 82, so that the mirror body 2 is fixed in the same direction and cannot rotate in the positioning hole 11.

At this time, the user opens the stopper buckle 7, as shown in fig. 3, so that the protective sleeve 6 can move relative to the housing 1, the slide rail assembly 4 disposed on the housing 1 is exposed, the user pulls the connecting rod 83 outwards along the direction of the connecting handle 22, the slider 8 connected to the connecting rod 83 compresses the spring 9 to move the positioning slot, and the positioning block slides out of the positioning slot, as shown in fig. 14 (b). Then, the corresponding mirror body 2 can slide from the corresponding positioning hole 11 to the communicating transverse slide rail 42, fig. 14(c) is a schematic view showing a state that the sliding member 8 moves in the slide rail assembly 4, and finally, the corresponding mirror body 2 moves on the viewing end 12 of the housing 1 through the slide rail assembly 4 and is fixed in the locking hole 14 through the matching of the locking groove 84 and the locking block 51; as shown in FIG. 15(a), pulling the mirror body 2 outward can ensure that the locking block 51 is disengaged from the locking hole 14, so that the mirror body 2 can move relative to the housing 1, and after releasing the force acting on the mirror body 2, the locking block 51 is engaged with the locking groove 84 under the driving of the spring 9, so as to fix the mirror body 2 in the locking hole 14 without rotating relative to the locking hole 14.

As shown in fig. 10 and 11, which are the usage state diagrams of the magnifier of the present embodiment, when the grip of the magnifier is not long enough in the usage scene, the length of the grip end 13 can be increased sufficiently by stretching the protective sheath 6, which is convenient for use.

The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. A magnifying glass capable of multiple times of number conversion, characterized in that: the lens comprises a shell (1) and a plurality of lens bodies (2) with different magnification factors, wherein each lens body (2) comprises a lens (21) and a connecting handle (22) connected to the lens (21), a plurality of positioning holes (11) used for positioning the lens bodies (2) are formed in the shell (1), the positioning holes (11) are uniformly distributed at intervals along the length direction of the shell (1), the lens bodies (2) are respectively fixed in the positioning holes (11) through connecting rods (83), an orientation mechanism used for preventing the connecting rods (83) from rotating and randomly moving in the positioning holes (11) is arranged in the shell (1), and the orientation mechanism ensures that the plurality of lenses (21) fixed on the shell (1) are arranged in parallel;

the shell (1) comprises an observation end (12) and a gripping end (13), a sliding rail assembly (4) is arranged on the shell (1), the sliding rail assembly (4) comprises a vertical sliding rail (41) and a plurality of transverse sliding rails (42), the transverse sliding rails (42) are arranged corresponding to the positioning holes (11), the transverse sliding rails (42) are arranged on one side provided with the positioning holes (11), and the vertical sliding rails (41) are arranged on the adjacent sides of the side surfaces provided with the positioning holes (11); the transverse sliding rail (42) is arranged perpendicular to the length direction of the shell (1), and the vertical sliding rail (41) is arranged along the length direction of the shell (1); one end of the transverse sliding rail (42) is communicated with the positioning hole (11), and the other end of the transverse sliding rail (42) extends to the adjacent side surface and is communicated with the vertical sliding rail (41);

a locking hole (14) for ensuring that the endoscope body (2) is located at a use position is formed in the observation end (12), one end of the vertical sliding rail (41) extends to the observation end (12) and is communicated with the locking hole (14), and a locking mechanism for fixing the endoscope body (2) at the use position is arranged on the observation end (12); the mirror body (2) can slide from the locating hole (11) to the locking hole (14) on the observation end (12) through the sliding rail assembly (4) and is locked in the locating hole (11) for use.

2. The magnification loupe of claim 1, wherein: the protective sleeve is characterized by further comprising a protective sleeve (6) sleeved on the outer side of the shell (1), wherein a slot (61) is formed in the protective sleeve (6), and the slot (61) is formed along the length direction of the protective sleeve (6); a locking sliding groove (15) arranged along the length direction is formed in the outer side of the shell (1), a sliding block (62) is arranged in the protective sleeve (6), and the protective sleeve (6) can be sleeved on the shell in a sliding mode along the length direction through the sliding block (62) and the locking sliding groove (15); the protective sleeve (6) is provided with a slot (61) formed in the length direction, the positioning hole (11) in the shell (1) is exposed outside through the slot (61), and the connecting handle (22) penetrates through the slot (61) and is arranged in the positioning hole (11).

3. The magnification loupe of claim 2, wherein: still include spacing knot (7), be convenient for casing (1) on protective sheath (6) to get into inside opening (63) of protective sheath (6), observation end (12) of casing (1) are followed expose in opening (63), spacing knot (7) rotatable setting is in on opening (63), casing (1) is located completely when protective sheath (6) are interior, spacing knot (7) lock is in observation end (12) on the locking hole.

4. The magnification loupe of claim 3, wherein: the limiting buckle (7) is provided with a limiting block (71) capable of limiting the rotation angle of the limiting block relative to the protective sleeve (6), the limiting block (71) is positioned at the joint of the limiting buckle (7) and the protective sleeve (6), and the maximum rotation angle of the limiting block (71) is 90 degrees; vertical slide rail (41) are close to the tip of observing end (12) and continue to extend and form spacing groove (411), one side that casing (1) was pressed close to in spacing knot (7) is equipped with lug (72), when casing (1) slip relatively to the protective sheath, lug (72) are in slide in vertical slide rail (41), and finally receive the restriction of spacing groove (411), guarantee that casing (1) can't be followed complete roll-off in protective sheath (6).

5. The magnification loupe of claim 4, wherein: the tip that opening (63) were kept away from to the protective housing is equipped with pull groove (64) of the pull of being convenient for, gripping end (13) of casing (1) are equipped with recess (131) that pull groove (64) used of being convenient for, recess (131) with pull groove (64) correspond the setting.

6. The loupe of claim 1 or 5, wherein: the bottom of the connecting handle (22) is provided with a sliding part (8), the sliding part (8) is provided with two symmetrically-arranged orientation grooves (81), the orientation grooves (81) are arranged along the length direction of the connecting soldier, and the connecting line of the two orientation grooves (81) is perpendicular to the plane of the lens (21); the orientation mechanism comprises two orientation blocks (31), the orientation blocks (31) are symmetrically arranged on the side wall of the location hole (11), and when the connecting handle (22) is located in the location hole (11), the orientation blocks (31) are located in the orientation grooves (81).

7. The magnification loupe of claim 6, wherein: the sliding rail assembly (4) further comprises an inner sliding groove (43), and the inner sliding groove (43) is positioned at the bottoms of the transverse sliding rail (42) and the vertical sliding rail (41); a sliding block (82) is arranged at one end, away from the connecting handle (22), of the sliding piece (8), a connecting rod (83) is arranged between the sliding block (82) and the sliding piece (8), the sliding piece (8) is located in the sliding rail assembly (4), and the sliding block (82) is located in the inner sliding groove (43); one side of the orientation groove (81) close to the sliding block (82) is open, when the mirror body (2) moves outwards along the length direction of the connecting handle (22), the orientation block (31) leaves the orientation groove (81) from one end of the orientation groove (81) close to the sliding block (82), and the corresponding mirror body (2) can slide into the sliding rail assembly (4) from the positioning hole (11).

8. The magnification loupe of claim 7, wherein: the connecting rod (83) is sleeved with a spring (9), and the spring (9) is located in the inner sliding groove (43).

9. The magnification loupe of claim 8, wherein: locking mechanical system includes locking piece (51), slider (8) are close to the one end of sliding block (82) and set up locking groove (84) that two symmetries set up, and line perpendicular to the line between two orientation grooves (81) between two locking grooves (84) passes through when corresponding mirror body (2) pass through slide rail set spare (4) move to in locking hole (14), outwards stimulate connecting rod (83), make locking piece (51) insert in locking groove (84).

10. The loupe of claim 1 or 9, wherein: the side edge of the lens (21) far away from the connecting handle (22) is provided with a signboard (91) which is convenient for a user to recognize the magnification.