Single-hand focusing device and handheld thermal imager

Abstract

The utility model discloses a single-hand focusing device, and relates to the technical field of imaging equipment, a focusing roller is arranged close to an eyepiece end and is used for a finger of a holding hand to dial, a motion conversion assembly has a motion conversion function and converts rotation of the focusing roller into linear translation of a transmission strip, one end of the transmission strip is connected to the motion conversion assembly, and the other end of the transmission strip is connected to the eyepiece end. The transmission strip further drives the objective lens support or the movement support to move horizontally relative to the main support in the direction of the optical axis, and the focusing action is achieved. The focusing roller used for being controlled by fingers is located at the position close to the eyepiece, operation can be conducted by means of the index finger of the holding hand, and single-hand holding and focusing are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to imaging equipment technical field, further relates to a single hand focusing device and handheld thermal imager. BACKGROUND

[0002] Handheld observation equipment is usually composed of three main components of front end lens, middle body and rear end ocular lens, and is equipped with lens cover, photoelectric sensing assembly, power supply assembly, eyeshade and the like. Focusing knob changes rotation into lens extension and retraction through mechanical transmission, and adjusts focal length to make imaging clear.

[0003] In traditional imaging equipment, focusing knob of lens is usually arranged near lens optical mechanism, and ocular lens diopter adjustment knob is usually arranged near ocular lens optical mechanism. When user needs to observe targets at different distances, lens focal length needs to be frequently adjusted, at which time device needs to be held by one hand, and lens focusing knob needs to be operated by the other hand, so both hands need to be occupied, which is very inconvenient.

[0004] For those skilled in the art, how to realize focusing by holding device with hand is a technical problem to be solved at present. CONTENT OF UTILITY MODEL

[0005] The core of the utility model is to provide a single hand focusing device, focusing roller near ocular lens can be rotated by fingers of holding hand, and through transmission bar transmission, objective lens support or core support at one end of objective lens is translated, so that single hand holding and focusing are completed, and specific scheme is as follows:

[0006] A single hand focusing device, comprising main support, objective lens support, core support, transmission bar, motion conversion assembly and focusing roller;

[0007] The objective lens support or the core support can be translated along the optical axis direction relative to the main support. The focusing roller is arranged near the ocular lens end, and is used for rotating by the fingers of the holding hand.

[0008] The motion conversion assembly is arranged between the focusing roller and the transmission bar, and is used for converting rotation of the focusing roller into linear translation of the transmission bar.

[0009] One end of the transmission bar is connected to the motion conversion assembly, and the other end is connected to the objective lens support or the core support, and is used for driving the objective lens support or the core support to translate along the optical axis direction.

[0010] Optionally, the motion conversion assembly comprises focusing shaft and focusing seat, the focusing shaft and the focusing roller are fixed in circumference, a spiral groove is arranged on the side wall of the focusing shaft, a guide pin is arranged on the focusing seat, the guide pin and the spiral groove are matched with each other, and are used for driving the focusing seat to translate along the optical axis when the focusing shaft rotates.

[0011] Optionally, the objective lens holder is fixed to one end of the main holder, and the core holder is slidingly assembled in the objective lens holder.

[0012] Optionally, the two side walls of the core holder are respectively provided with side pads.

[0013] The first sliding pad is arranged between the upper surface of the core holder and the upper surface of the objective lens holder, and the second sliding pad is arranged between the upper surface of the objective lens holder and the transmission bar.

[0014] Optionally, the upper surface of the core holder is provided with a connecting column, the connecting column sequentially passes through the first sliding pad and the second sliding pad, supports the transmission bar, and fixes the transmission bar, the second sliding pad and the first sliding pad through a screw.

[0015] The upper surface of the objective lens holder is provided with an avoiding groove for avoiding the connecting column.

[0016] Optionally, the transmission bar is a flat plate arranged above the main holder.

[0017] Optionally, a supporting seat is fixedly arranged on the main holder, a guide sliding groove is arranged on the supporting seat, a guide notch is arranged on the transmission bar, and the edge of the guide notch can be at least partially regionally slidably matched with the guide sliding groove.

[0018] Optionally, the spiral groove is a non-closed groove with a first end not connected to a second end.

[0019] Alternatively, the spiral groove is a closed groove with a first end connected to a second end.

[0020] Optionally, a limiting baffle is fixedly arranged on the main holder, and the limiting baffle is used for clamping the circumferential groove arranged on the focusing shaft.

[0021] The utility model also provides a handheld thermal imager, including single hand focusing device of any above, still include key board, the key for control is arranged on the key board.

[0022] Optionally, a supporting protrusion is arranged on the main holder, the supporting protrusion is guidedly matched with the edge of the transmission bar, and the top end of the supporting protrusion supports the key board.

[0023] The utility model provides a single hand focusing device, and the focusing roller is arranged near the ocular end, is used for the finger of the hand holding to turn, and the motion conversion component plays the function of conversion movement, converts the rotation of the focusing roller into the linear translation of the transmission bar, one end of the transmission bar is connected to the motion conversion component, the other end is connected to the objective support or the core support, the transmission bar further carries the objective support or the core support and translates along the optical axis direction relative to the main support, realizes the focusing action. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing of simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0025] Figure 1 It is the explosion map of the single hand focusing device of the utility model;

[0026] Figure 2 It is the front view of the first embodiment of focusing shaft;

[0027] Figure 3 It is the front view of the second embodiment of focusing shaft;

[0028] Figure 4 It is the appearance axonometric drawing of the handheld thermal imager of the utility model;

[0029] Figure 5 It is the section view of the handheld thermal imager of the utility model.

[0030] The drawings include:

[0031] Main support 1, support seat 11, guide sliding slot 111, limit baffle 12, support boss 13, objective support 2, avoiding groove 21, core support 3, side cushion block 31, first sliding cushion block 32, second sliding cushion block 33, connecting column 34, transmission bar 4, guide notch 41, motion conversion component 5, focusing shaft 51, spiral groove 511, circumferential groove 512, focusing seat 52, guide nail 521, focusing roller 6, button plate 7, button 71, protective rubber sleeve 72. DETAILED DESCRIPTION

[0032] In order to make those skilled in the art better understand the technical scheme of the utility model, below will combine the drawing and specific implementation, introduce the single hand focusing device and the handheld thermal imager of the utility model in detail.

[0033] Combining Figure 1 The utility model provides a single hand focusing device, including main support 1, objective support 2, machine core support 3, transmission bar 4, motion conversion component 5, focusing roller 6 etc. structure, main support 1 is main body support structure, main support 1 is installed on the shell of handheld device, with main support 1 as reference, main support 1 is fixed structure.

[0034] Objective support 2 or machine core support 3 can be translated along the optical axis direction relative to main support 1, that is, one of objective support 2 or machine core support 3 is fixed to main support 1, and the other can be translated relative to main support 1, and the translation direction of objective support 2 or machine core support 3 is along the optical axis direction of main support 1, and the optical axis is the center line of the light beam. Objective support 2 is used to fix and install the objective lens, and machine core support 3 is used to fix and install the machine core. The light rays entering from the objective lens are processed by the machine core. By adjusting the distance between the optical axis direction of objective support 2 and machine core support 3, the focusing operation can be completed. The purpose of focusing is to focus the light rays entering from the objective lens on the imaging surface of the machine core to form a clear image.

[0035] Part of the structure of focusing roller 6 is exposed outside for finger to rotate. Focusing roller 6 is arranged near the eyepiece end, and the eyepiece end is the end for the user to observe the image. When the device is held by the user with one hand, the whole device is held by the user's whole palm. Since the user's holding hand supports the device, focusing roller 6 is opposite to the index finger of the holding hand, which is used for finger to rotate. That is, the focusing roller 6 is operated by the index finger of the holding hand, and the focusing roller 6 is driven to rotate forward or reverse. The index finger is the most flexible finger in the whole hand. By arranging the focusing roller 6 opposite to the index finger, the focusing action can be completed by using a single finger to rotate the focusing roller 6 while stably holding the whole device.

[0036] Motion conversion component 5 is arranged between focusing roller 6 and transmission bar 4, and is used to convert the rotation of focusing roller 6 into the linear translation of transmission bar 4. Motion conversion component 5 functions as a motion conversion component. Transmission bar 4 can only do linear translation, and focusing roller 6 can only rotate around its rotation axis. Motion conversion component 5 converts the rotation of focusing roller 6 into the linear motion of transmission bar 4 in one direction.

[0037] The transmission bar 4 extends in a direction parallel to the optical axis, one end of the transmission bar 4 is connected to the motion conversion assembly 5, and the other end is connected to the objective lens support 2 or the core support 3, for translating the objective lens support 2 or the core support 3 along the optical axis, one of the objective lens support 2 and the core support 3 is kept relatively fixed with the main support 1, and the other one can be translated in a direction parallel to the optical axis, and the relative translation between the objective lens support 2 and the core support 3 can adjust the relative distance between the objective lens and the core, so that focusing is realized. The transmission bar 4 is a middle transmission structure, one end of which extends to the focusing seat 52 close to the ocular lens, and the other end extends to the objective lens support 2 or the core support 3. The transmission bar 4 spans the middle part of the entire device and has sufficient rigidity to meet the transmission requirements. The transmission bar 4 is an elongated or flat structure and does not occupy too much space inside the device.

[0038] The single-hand focusing device can be applied to an imaging device, and the focusing roller 6 controlled by fingers is located close to the ocular lens. When the entire device is held by a hand, the focusing roller 6 is within the control range of the index finger of the holding hand, can be operated by a single finger of the holding hand, single-hand holding and focusing are realized, generally, the index finger is directed to the focusing roller 6, the focusing roller 6 is arranged close to the index finger, and a user can adjust the far and near focus by operating the focusing roller 6 with the index finger, so that the observation of different distance targets is facilitated. When the focusing operation is performed, the other hand does not need to participate, and the focusing can be completed by only one hand, and the use convenience is greatly improved.

[0039] In some embodiments of the utility model, the motion conversion assembly 5 includes a focusing shaft 51 and a focusing seat 52, the focusing shaft 51 and the focusing roller 6 are fixed in the circumferential direction, the focusing shaft 51 and the focusing roller 6 keep synchronous rotation, and the rotation shafts of the focusing shaft 51 and the focusing roller 6 are parallel to the optical axis direction of the objective lens. The focusing seat 52 can move in translation relative to the main support 1, and the translation direction of the focusing seat 52 is parallel to the optical axis direction.

[0040] A spiral groove 511 is arranged on the side wall of the focusing shaft 51, the spiral groove 511 is at least partially a spiral line, a guide pin 521 is arranged on the focusing seat 52, the guide pin 521 and the spiral groove 511 cooperate with each other, the guide pin 521 is inserted into the spiral groove 511 during use, and is used for driving the focusing seat 52 to move in translation along the optical axis when the focusing shaft 51 rotates. The guide pin 521 moves in linear translation synchronously with the focusing seat 52, and the guide pin 521 can also relatively displace along the spiral groove 511. When the focusing shaft 51 drives the spiral groove 511 to rotate, the spiral groove 511 drives the focusing seat 52 to move in translation through the guide pin 521. By controlling the forward rotation or reverse rotation of the focusing shaft 51, the focusing seat 52 can reciprocate in translation in two directions parallel to the optical axis.

[0041] The utility model provides a kind of specific structure form, the objective lens support 2 is fixed to one end of main support 1, Figure 1As shown, the objective holder 2 is fixed to the left end of the main holder 1, and the two are fixed by screws. The cross-sectional area of the core holder 3 perpendicular to the optical axis direction is smaller than that of the objective holder 2, the core holder 3 is slidingly assembled in the objective holder 2, and the core holder 3 is constrained by the objective holder 2 to move linearly. Since the objective holder 2 and the main holder 1 are relatively fixed, the objective holder 2 remains stationary, and only the core holder 3 is adjusted to drive the core to move linearly along the optical axis.

[0042] In combination Figure 1 As shown, side pads 31 are arranged on the two side walls of the core holder 3, respectively, and the side pads 31 form a gap between the two side walls of the core holder 3 and the two side walls of the objective holder 2, and play a lubricating role, which can avoid direct contact between the side walls of the core holder 3 and the side walls of the objective holder 2 to cause wear. The side pads 31 can be made of nylon material.

[0043] A first sliding pad 32 is arranged between the upper surface of the core holder 3 and the upper surface of the objective holder 2, which plays a spacing role between the upper surface of the core holder 3 and the upper surface of the objective holder 2 to avoid direct contact and plays a lubricating role. A second sliding pad 33 is arranged between the upper surface of the objective holder 2 and the transmission bar 4, which forms a gap between the upper surface of the objective holder 2 and the transmission bar 4 and plays a lubricating role. The left and right side pads 31 and the first and second sliding pads 32 and 33 play a spacing and lubricating role, so that the core holder 3 moves smoothly along the optical axis direction. The first and second sliding pads 32 and 33 can be made of nylon material.

[0044] A connecting column 34 is arranged on the upper surface of the core holder 3, which protrudes upward from the upper surface of the core holder 3, in combination Figure 1 As shown, two connecting columns 34 are arranged, which play a certain role in resisting torsion. The first and second sliding pads 32 and 33 are respectively provided with avoiding holes for avoiding the connecting columns 34, the connecting columns 34 pass through the first and second sliding pads 32 and 33 in sequence, the top end of the connecting column 34 supports the transmission bar 4, and the transmission bar 4, the second sliding pad 33 and the first sliding pad 32 are fixed by screws; the screws pass through the through holes of the transmission bar 4 and are screwed downward on the connecting column 34, and when the screws are pressed, the transmission bar 4, the second sliding pad 33 and the first sliding pad 32 can be relatively fixed and assembled.

[0045] The upper surface of the objective holder 2 is provided with an avoiding groove 21 for avoiding the connecting column 34, and the connecting column 34 can enter the avoiding groove 21 to make the core holder 3 translate along the optical axis relative to the objective holder 2.

[0046] In combination Figure 1As shown, the transmission bar 4 is a flat plate arranged above the main support 1, has sufficient rigidity, and can bear tension and pressure along the optical axis direction. In addition, the transmission bar 4 can also adopt a grid structure or a mesh structure, and these structures can realize the transmission function synchronously.

[0047] In combination Figure 1 As shown, the support seat 11 is fixedly arranged on the main support 1, is arranged upwardly and protrudingly, the top end of the support seat 11 is higher than the transmission bar 4, and the support seat 11 passes through the guide notch 41 arranged on the transmission bar 4. The guide sliding groove 111 is arranged on the support seat 11, is arranged on the left and right sides of the support seat 11 respectively, at least part of the edge of the guide notch 41 arranged on the transmission bar 4 can be slidably matched with the guide sliding groove 111, the mutual cooperation between the guide sliding groove 111 and the guide notch 41 plays a role of straight-line guiding for the transmission bar 4, and prevents the transmission bar 4 from being twisted. One end of the guide notch 41 is arranged with a part with a relatively large width for the support seat 11 to pass through, and other parts of the guide notch 41 are relatively narrow in width, and the widths of the other parts are equal, so that the edge of the guide notch 41 can be slidably inserted into the guide sliding groove 111.

[0048] On the basis of any of the technical solutions and the mutual combination thereof, the utility model provides two specific structures of the focusing shaft 51. 1) The spiral groove 511 is a non-closed groove with the first end and the second end not connected; 2) the spiral groove 511 is a closed groove with the first end and the second end connected. Figure 2 The spiral groove 511 shown is a non-closed groove with the first end and the second end not connected, the first end and the second end of the spiral groove 511 do not coincide, so that when the guide pin 521 reaches one end of the spiral groove 511, the guide pin 521 cannot continue to move, and the focusing shaft 51 can only be reversely rotated to make the focusing seat 52 reversely move. Figure 3 The spiral groove 511 shown is a closed groove with the first end and the second end connected, the whole groove is a cycle, can be rotated all the time, and one rotation is two focusing strokes; the whole spiral groove 511 is axisymmetric, the axis of symmetry coincides with the axis of the focusing shaft 51, and the axis of symmetry is Figure 3 The paper surface in the middle is axisymmetric with the visible part in front and the shielding part behind. When the guide pin 521 starts from the point farthest from the objective lens, the focusing shaft 51 is forwardly or reversely rotated by 180° to reach the nearest point; when the guide pin 521 starts from the point nearest to the objective lens, the focusing shaft 51 is forwardly or reversely rotated by 180° to reach the farthest point. In Figure 3 In the closed groove structure with the first end and the second end connected, the focusing shaft 51 is rotated in the same direction, can continuously adjust the near focus distance → adjust the far focus distance → adjust the near focus distance → adjust the far focus distance ……, and forms a cycle.

[0049] In combination Figure 1As shown, the main support 1 is fixedly provided with a limiting baffle 12, the limiting baffle 12 is used for clamping the circumferential groove 512 arranged on the focusing shaft 51, a ring-shaped circumferential groove 512 is arranged on the side wall of the focusing shaft 51, the upper part of the limiting baffle 12 is provided with an arc-shaped notch, the width of the circumferential groove 512 is slightly larger than the thickness of the limiting baffle 12, so that the focusing shaft 51 can only rotate and cannot move forward and backward along the optical axis direction; when the focusing shaft 51 rotates, the screw motion is converted into the horizontal movement of the focusing seat 52, and then the focusing shaft 51 is limited by the limiting baffle and cannot move horizontally, and only the focusing seat 52 can move forward and backward.

[0050] The utility model discloses still provide a kind of hand-held thermal imager, in combination Figure 4 、 Figure 5 As shown, the hand-held thermal imager includes the single-hand focusing device described above, and realizes thermal imaging by the movement of the core. The hand-held thermal imager further includes a key plate 7, which is a PCB plate having corresponding electrical elements arranged thereon. The key plate 7 is provided with keys 71 for control. The keys 71 are covered with protective rubber sleeves 72. The protective rubber sleeves 72 have concave-convex patterns on their surfaces for hand pressing and providing tactile feedback. When the protective rubber sleeves 72 are pressed, the corresponding keys 71 can be triggered. Different keys 71 can trigger corresponding functions when triggered.

[0051] The main support 1 is provided with a plurality of support protrusions 13, which are protruding boss structures. The support protrusions 13 are in edge-guiding cooperation with the transmission bar 4. The support protrusions 13 do not affect the translational movement of the transmission bar 4. The support protrusions 13 limit the transmission bar 4 on both sides of its movement direction, allowing the transmission bar 4 to move linearly and reciprocally. The top ends of the support protrusions 13 support the lower surface of the key plate 7, providing support and holding for the key plate 7. The support protrusions 13 support the key plate 7. Screw holes are left at the positions where the key plate 7 needs to be fixed. The key plate 7 is fixed to the support protrusions 13 by screws.

[0052] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model should not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single hand focusing device characterized by, The main support (1), the objective lens support (2), the core support (3), the transmission bar (4), the motion conversion assembly (5), the focusing roller (6); The objective lens support (2) or the core support (3) can be translated along the optical axis direction relative to the main support (1); the focusing roller (6) is arranged near the eyepiece end, and is used for being rotated by the fingers of the holding hand; The motion conversion assembly (5) is arranged between the focusing roller (6) and the transmission bar (4), and is used for converting the rotation of the focusing roller (6) into the linear translation of the transmission bar (4); One end of the transmission bar (4) is connected to the motion conversion assembly (5), and the other end is connected to the objective lens support (2) or the core support (3), so as to drive the objective lens support (2) or the core support (3) to translate along the optical axis direction.

2. The single hand focusing device of claim 1, wherein, The motion conversion assembly (5) comprises a focusing shaft (51) and a focusing seat (52), the focusing shaft (51) and the focusing roller (6) are fixed in the circumferential direction, a spiral groove (511) is arranged on the side wall of the focusing shaft (51), a guide pin (521) is arranged on the focusing seat (52), the guide pin (521) and the spiral groove (511) are matched with each other, and are used for driving the focusing seat (52) to translate along the optical axis when the focusing shaft (51) rotates.

3. The single hand focusing device of claim 2, wherein, The objective lens support (2) is fixed to one end of the main support (1), and the core support (3) is slidingly assembled in the objective lens support (2); Two side walls of the core support (3) are respectively provided with side pads (31); A first sliding pad (32) is arranged between the upper surface of the core support (3) and the upper surface of the objective lens support (2), and a second sliding pad (33) is arranged between the upper surface of the objective lens support (2) and the transmission bar (4).

4. The single hand focusing device of claim 3, wherein, The upper surface of the core support (3) is provided with a connecting column (34), the connecting column (34) passes through the first sliding pad (32) and the second sliding pad (33) in sequence, supports the transmission bar (4), and fixes the transmission bar (4), the second sliding pad (33) and the first sliding pad (32) through a screw; The upper surface of the objective lens support (2) is provided with an avoiding groove (21) for avoiding the connecting column (34).

5. The single hand focusing device of claim 2, wherein, The transmission bar (4) is a flat plate arranged above the main support (1).

6. The single hand focusing device of claim 5, wherein, A supporting seat (11) is fixedly arranged on the main support (1), a guide sliding groove (111) is arranged on the supporting seat (11), a guide notch (41) is arranged on the transmission bar (4), and the edge of the guide notch (41) can be at least partially regionally matched with the guide sliding groove (111) in sliding mode.

7. Single hand focusing device according to any of claims 2 to 6, characterized in that The spiral groove (511) is a non-closed groove with a first end not connected to a second end. Alternatively, the spiral groove (511) is a closed groove with a first end connected to a second end.

8. The single hand focusing device of claim 7, wherein, A limiting baffle (12) is fixedly arranged on the main support (1), and the limiting baffle (12) is used for clamping a circumferential groove (512) arranged on the focusing shaft (51).

9. A hand-held thermal imager, characterized in that The single-hand focusing device comprises a key plate (7) provided with keys (71) for operation.

10. The handheld thermal imager of claim 9, wherein, The main support (1) is provided with a support protrusion (13) which is guided with the edge of the transmission bar (4), and the top of the support protrusion (13) supports the key plate (7).

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