Telescope with adjustable focal length

Abstract

The utility model relates to the technical field of telescopes, and discloses a telescope with an adjustable focal length, which comprises two lens cones, a same connecting seat is fixedly mounted between the two lens cones, a transmission box is fixedly mounted on the rear side of the connecting seat, and a lens mechanism is arranged in each lens cone; an adjusting mechanism is arranged in the connecting seat, two rotating shafts are rotatably mounted on the inner wall of the front side of the transmission case, the rear ends of the rotating shafts are rotatably connected with the inner wall of the rear side of the transmission case, a telescopic cylinder slidably sleeves the lens cone, a same seat hole is formed between the connecting seat and the lens cone, and sliding holes are formed in the two sides of the transmission case. Compared with the prior art, the optical path system has the following advantages and effects that the distance between the eyepiece and the objective lens can be changed through the arrangement of the wire moving mechanism, the purpose of adjusting the focal length of the telescope can be further achieved, and the purposes of reducing external light interference and dust entry and ensuring the stability and imaging quality of the optical path system can be achieved through the arrangement of the telescopic cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of telescope technology, in particular to a telescope with adjustable focal length. BACKGROUND

[0002] A telescope is a visual optical instrument for observing distant objects, which can magnify the small angle of the distant object by a certain times, so that it has a larger angle in the image space, and the object that cannot be clearly seen or distinguished by the naked eye becomes clear and distinguishable. Therefore, the telescope is an indispensable tool in astronomy and ground observation, which is an optical system that makes the incident parallel light beam still parallel.

[0003] According to the search, the patent document with the authorization announcement number CN217007849U discloses a telescope with a visual degree and focal length adjusting mechanism, the shaft rod includes a focusing section and a sleeve section arranged in the same shaft from top to bottom; the lens barrel is arranged in parallel with the shaft rod, and the side wall of the lens barrel is sleeved on the side wall of the sleeve section through the connecting arm; the focusing mechanism includes an inner disc sleeve, an outer disc sleeve, an adjusting rod, a pin and a moving lens group; the inner wall of the inner disc sleeve is sleeved on the focusing section and is rotationally connected with the outer wall of the focusing section, and the upper segment of the inner disc sleeve is outwardly convex in the circumferential direction; the inner wall of the outer disc sleeve is threadedly connected with the outer wall of the lower segment of the inner disc sleeve; the side edge of the outer disc sleeve is clamped in the circumferential groove of the upper segment of the adjusting rod, the middle segment of the adjusting rod is slidingly installed on the connecting arm in parallel with the shaft rod, and the fixed end of the pin is installed in the radial hole of the lower segment of the adjusting rod; the extended end of the pin extends into the lens barrel through the clearance hole on the side wall of the lens barrel and is connected with the moving lens group, and the moving lens group is slidingly connected with the inner wall of the lens barrel.

[0004] In actual use, it is found that the existing telescope cannot extend the lens barrel synchronously when adjusting the focal length, which easily causes interference of external light on the internal light path, thereby affecting the observation experience. Therefore, the present application provides a telescope with adjustable focal length to solve the above problems. Content of the utility model

[0005] The purpose of the present application is to solve the problem in the prior art that the lens barrel cannot be extended synchronously when adjusting the focal length, which easily causes interference of external light on the internal light path, thereby affecting the observation experience, and a telescope with adjustable focal length is provided.

[0006] The above technical purpose of the application is achieved by the following technical scheme: a focal length adjustable telescope, comprising two lens barrels, a same connecting seat fixedly installed between the two lens barrels, a transmission box fixedly installed at the rear side of the connecting seat, and a lens mechanism arranged in the lens barrel; an adjusting mechanism is arranged in the connecting seat, two rotating shafts are rotatably installed on the front side inner wall of the transmission box, the rear end of the rotating shaft is rotatably connected with the rear side inner wall of the transmission box, a telescopic barrel is slidably sleeved on the lens barrel, a same seat hole is formed between the connecting seat and the lens barrel, a sliding hole is formed on each side of the transmission box, two first plate holes and two second plate holes are formed on the top inner wall of the connecting seat, the first plate hole is located on the inner side of the second plate hole, and the first plate hole and the second plate hole both penetrate through the bottom of the transmission box.

[0007] Further provided in the application is that the lens mechanism comprises an eyepiece sleeve, an eyepiece and an objective lens, the eyepiece sleeve is slidably installed on the inner wall of the lens barrel, the eyepiece is arranged in the eyepiece sleeve, the objective lens is arranged in the lens barrel, and the objective lens is located above the eyepiece sleeve.

[0008] By adopting the above technical scheme, the lens mechanism is provided, so that the observation object can be observed through the eyepiece and the objective lens.

[0009] Further provided in the application is that the adjusting mechanism comprises a lead screw and a lead screw seat, the lead screw is rotatably installed on the top inner wall of the connecting seat, the lead screw is located between the two first plate holes, the bottom end of the lead screw penetrates through the bottom of the connecting seat, the lead screw seat is threadedly sleeved on the lead screw, the lead screw seat is slidably connected with the seat hole, the lead screw seat is fixedly connected with the corresponding eyepiece sleeve on both sides, and a gear mechanism is arranged between the lead screw seat and the rotating shaft.

[0010] By adopting the above technical scheme, the lead screw can drive the lead screw seat to move up and down, the eyepiece sleeve and the eyepiece can be driven to move up and down, and the distance between the eyepiece and the objective lens can be adjusted.

[0011] Further provided in the application is that the gear mechanism comprises a gear, a first rack plate and a second rack plate, the gear is fixedly sleeved on the rotating shaft, the first rack plate is fixedly installed on the top of the lead screw seat, the first rack plate is slidably connected with the inner wall of the corresponding first plate hole, the same second rack plate is slidably installed on the inner wall of the front side and the rear side of the second plate hole, and the gear is engaged with the first rack plate and the second rack plate.

[0012] By adopting the above technical scheme, the lead screw seat can drive the connecting block to move in the opposite direction through the gear mechanism.

[0013] Further provided in the application is that the connecting block is fixedly installed on the outer side of the second rack plate, the other side of the connecting block is fixedly connected with the corresponding telescopic barrel, and the connecting block is slidably connected with the corresponding sliding hole.

[0014] By adopting the technical scheme, the second rack plate can drive the eyepiece sleeve to move through the connecting block.

[0015] The application further provides that the screw rod base is provided with a through hole located outside the first rack plate, and the second rack plate is matched with the corresponding through hole.

[0016] By adopting the technical scheme, the screw rod can be conveniently rotated through the rotating knob.

[0017] The application further provides that the screw rod base is provided with a through hole located outside the first rack plate, and the second rack plate is matched with the corresponding through hole.

[0018] By adopting the technical scheme, the screw rod base will not block the up-down movement of the second rack plate.

[0019] The application has the following beneficial effects.

[0020] (1) The rotating knob, the screw rod, the screw rod base and the eyepiece sleeve are matched, the screw rod base can be driven to move up and down through the rotating knob, the eyepiece can be driven to move up and down through the eyepiece sleeve, the distance between the eyepiece and the objective lens can be changed, and the focal length of the telescope can be adjusted.

[0021] (2) The screw rod base, the first rack plate, the gear, the second rack plate, the connecting block and the telescopic cylinder are matched, when the focal length is increased, the telescopic cylinder can be elongated, the telescopic cylinder can be telescoped to correspondingly adjust the overall length of the telescope, the position of the internal optical structure can be adjusted, the internal components are prevented from being excessively exposed due to the focal length adjustment, the internal optical system can be ensured to be in a relatively closed and stable environment, the external light interference and dust entering are reduced, and the stability of the optical system and the imaging quality are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0023] Figure 1 is a perspective structural schematic view of a telescope with adjustable focal length according to the application;

[0024] Figure 2 is a schematic view of the internal structure of the connecting seat and the transmission box of a telescope with adjustable focal length according to the application;

[0025] Figure 3It is a schematic diagram of the internal structure of a telescope with adjustable focal length according to the present application;

[0026] Figure 4 It is a schematic diagram of structure A of a telescope with adjustable focal length according to the present application.

[0027] In the figure: 1, lens barrel; 2, connecting seat; 3, transmission box; 301, rotating shaft; 4, telescopic barrel; 5, seat hole; 101, eyepiece sleeve; 102, eyepiece; 103, objective lens; 201, lead screw; 202, lead screw seat; 302, gear; 303, first rack plate; 304, second rack plate; 305, connecting block; 6, knob; 7, through hole. DETAILED DESCRIPTION

[0028] The technical solutions of the present application will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Reference Figures 1-4 , the present application provides a telescope with adjustable focal length, comprising two lens barrels 1, between which a same connecting seat 2 is fixedly installed, a transmission box 3 is fixedly installed on the rear side of the connecting seat 2, and a lens mechanism is arranged in the lens barrel 1; an adjusting mechanism is arranged in the connecting seat 2, two rotating shafts 301 are rotatably installed on the front side inner wall of the transmission box 3, the rear end of the rotating shaft 301 is rotatably connected with the rear side inner wall of the transmission box 3, a telescopic barrel 4 is slidably sleeved on the lens barrel 1, a same seat hole 5 is formed between the connecting seat 2 and the lens barrel 1, slide holes are formed on both sides of the transmission box 3, two first plate holes and two second plate holes are formed on the top inner wall of the connecting seat 2, the first plate hole is located on the inner side of the second plate hole, and the first plate hole and the second plate hole both penetrate through the bottom of the transmission box 3.

[0030] Specifically, the lens mechanism comprises an eyepiece sleeve 101, an eyepiece 102 and an objective lens 103, the eyepiece sleeve 101 is slidably installed on the inner wall of the lens barrel 1, the eyepiece 102 is arranged in the eyepiece sleeve 101, the lens barrel 1 is provided with the objective lens 103, and the objective lens 103 is located above the eyepiece sleeve 101.

[0031] Specifically, the adjusting mechanism comprises a lead screw 201 and a lead screw seat 202, the lead screw 201 is rotatably installed on the top inner wall of the connecting seat 2, the lead screw 201 is located between the two first plate holes, the bottom end of the lead screw 201 penetrates through the bottom of the connecting seat 2, the lead screw seat 202 is threadedly sleeved on the lead screw 201, the lead screw seat 202 is slidably connected with the seat hole 5, the lead screw seat 202 is fixedly connected with the corresponding eyepiece sleeve 101 on both sides, and a gear mechanism is arranged between the lead screw seat 202 and the rotating shaft 301.

[0032] Specifically, the tooth mechanism comprises a gear 302, a first rack plate 303 and a second rack plate 304, the gear 302 is fixedly sleeved on the rotating shaft 301, the first rack plate 303 is fixedly installed on the top of the screw rod seat 202 and is in sliding connection with the inner wall of the corresponding first plate hole, the same second rack plate 304 is slidingly installed on the front and rear inner walls of the second plate hole, and the gear 302 is in engagement with the first rack plate 303 and the second rack plate 304.

[0033] Specifically, the second rack plate 304 is fixedly installed on the outer side of the connecting block 305, the other side of the connecting block 305 is fixedly connected with the corresponding telescopic cylinder 4, and the connecting block 305 is in sliding connection with the corresponding sliding hole.

[0034] Specifically, the bottom end of the screw rod 201 is fixedly installed with a rotating knob 6, and the rotating knob 6 is provided with anti-skid lines.

[0035] Specifically, the screw rod seat 202 is provided with a through hole 7, the through hole is located on the outer side of the first rack plate 303, and the second rack plate 304 is matched with the corresponding through hole.

[0036] In the application, when the focal length of the telescope needs to be adjusted, the rotating knob 6 is rotated to drive the screw rod 201 to rotate and drive the screw rod seat 202 to slide up and down along the seat hole 5. The screw rod seat 202 is fixedly connected with the eyepiece sleeve 101 on both sides, so as to drive the eyepiece sleeve 101 to move up and down in the lens barrel 1, and then drive the eyepiece 102 to move up and down, so as to change the distance between the eyepiece 102 and the objective lens 103, and then achieve the purpose of adjusting the focal length of the telescope.

[0037] Meanwhile, the first rack plate 303 fixed on the top of the screw rod seat 202 slides up and down with the screw rod seat 202, the first rack plate 303 is in engagement with the gear 302 on the rotating shaft 301, the gear 302 rotates, the gear 302 is in engagement with the second rack plate 304, the second rack plate 304 is driven to slide on the front and rear inner walls of the second plate hole, the second rack plate 304 drives the telescopic cylinder 4 to slide up and down on the lens barrel 1 through the connecting block 305 on the outer side, so as to realize synchronous adjustment of the telescopic cylinder 4 and the eyepiece sleeve 101. Since the change of the focal length will cause the length of the entire optical system to change, the telescopic cylinder 4 can correspondingly adjust the overall length of the telescope to adapt to the position adjustment of the internal optical structure, avoid the internal components from being excessively exposed due to the focal length adjustment, ensure that the internal optical system is in a relatively closed and stable environment, reduce the interference of external light and the entry of dust, and ensure the stability of the optical system and the imaging quality.

Claims

1. An adjustable focus telescope, characterized by, The utility model provides a kind of lens, including two mirror barrels (1), same connecting seat (2) is fixedly installed between two the mirror barrel (1), the connecting seat (2) rear side is fixedly installed with transmission case (3), lens mechanism is provided in the mirror barrel (1). Adjusting mechanism is arranged in the connecting seat (2), two rotating shafts (301) are rotatably connected to the front inner wall of the transmission case (3), the rear end of the rotating shaft (301) is rotatably connected to the rear inner wall of the transmission case (3), the telescopic barrel (4) is slidably arranged on the mirror barrel (1), a seat hole (5) is formed between the connecting seat (2) and the mirror barrel (1), sliding holes are formed on both sides of the transmission case (3), two first plate holes and two second plate holes are formed in the top inner wall of the connecting seat (2), the first plate hole is located inside the second plate hole, and the first plate hole and the second plate hole penetrate the bottom of the transmission case (3).

2. A variable focus telescope according to claim 1, wherein: The lens mechanism includes an eyepiece sleeve (101), an eyepiece (102) and an objective lens (103), the eyepiece sleeve (101) is slidably arranged on the inner wall of the mirror barrel (1), the eyepiece (102) is arranged in the eyepiece sleeve (101), and the objective lens (103) is arranged in the mirror barrel (1).

3. The adjustable focal length telescope of claim 1, wherein: The adjusting mechanism includes a lead screw (201) and a lead screw seat (202), the lead screw (201) is rotatably arranged on the top inner wall of the connecting seat (2), the lead screw (201) is located between the two first plate holes, the bottom end of the lead screw (201) penetrates the bottom of the connecting seat (2), the lead screw seat (202) is threadedly arranged on the lead screw (201), the lead screw seat (202) is slidably connected to the seat hole (5), the lead screw seat (202) is fixedly connected to the corresponding eyepiece sleeve (101) on both sides, and a gear mechanism is arranged between the lead screw seat (202) and the rotating shaft (301).

4. A variable focus telescope according to claim 3, wherein: The gear mechanism includes a gear (302), a first rack plate (303) and a second rack plate (304), the gear (302) is fixedly arranged on the rotating shaft (301), the first rack plate (303) is fixedly arranged on the top of the lead screw seat (202), the first rack plate (303) is slidably connected to the inner wall of the corresponding first plate hole, the second rack plate (304) is slidably arranged on the front inner wall and the rear inner wall of the second plate hole, and the gear (302) is engaged with the first rack plate (303) and the second rack plate (304).

5. A variable focus telescope according to claim 4, wherein: A connecting block (305) is fixedly arranged on the outside of the second rack plate (304), the other side of the connecting block (305) is fixedly connected to the corresponding telescopic barrel (4), and the connecting block (305) is slidably connected to the corresponding sliding hole.

6. The adjustable focal length telescope of claim 3, wherein: A rotating knob (6) is fixedly arranged on the bottom end of the lead screw (201), and anti-skid lines are arranged on the rotating knob (6).

7. The adjustable focal length telescope of claim 3, wherein: A through hole (7) is formed in the lead screw seat (202), the through hole is located on the outside of the first rack plate (303), and the second rack plate (304) is matched with the corresponding through hole.

Images