A kind of finder bulb filament imaging movement structure

Abstract

This invention provides a retinoscope bulb filament imaging motion structure, including an observation film housing assembly, a dustproof lens housing assembly, a rotating lamp holder assembly, and a lamp wick assembly. The rotating lamp holder assembly includes a condenser lens mount, a head connector, a lamp holder clamping sleeve, a lamp holder clamping pin, an elastic slip ring, a focus adjustment limiting pin, a lamp cover, a light-shielding bearing, and a condenser lens. The lamp wick assembly includes a lamp holder, an insulating post, a core, and a bulb. The lamp holder has circumferentially distributed grooves, and the lamp holder clamping sleeve has matching bosses, with the grooves and bosses circumferentially positioned and engaged. The lamp holder clamping sleeve has a racetrack-shaped elongated groove, and the cylindrical end of the focus adjustment limiting pin passes through this racetrack-shaped elongated groove to form an axial guiding engagement. The outer surface of the elastic slip ring has elastic protrusions that elastically abut against the inner wall of the condenser lens mount. The lamp wick assembly of the retinoscope bulb filament imaging motion structure provided by this invention can be pulled out as a whole, facilitating bulb replacement.

Description

Technical Field

[0001] This utility model mainly relates to the field of retinoscope technology, specifically to a retinoscope bulb filament imaging motion structure. Background Technology

[0002] A retinoscope is a core instrument in ophthalmology and optometry used to objectively measure the refractive state of the human eye (myopia, hyperopia, astigmatism). Its principle is to determine the refractive power by observing the "shadow movement" of reflected light after illuminating the fundus with a light source. Its core optical requirements are:

[0003] 1. The light source of the strip light refraction microscope is a straight filament, which projects a thin, uniform light band with clear boundaries; 2. The filament must be able to move axially to change the distance between the filament and the condenser lens, and adjust the convergence and divergence of the light band, including parallel, divergent and convergent; 3. The filament has 360° rotation to position the optical axis.

[0004] Existing retinoscopes generally have the following problems: the filament is prone to deviation and wobbling when rotating, resulting in poor alignment of the light band rotation, and the image is prone to flickering when rotating. They are also inconvenient to operate during use, requiring a long time to manually press the toggle switch during focusing, which is tiring for the user. Based on these issues, a retinoscope bulb filament imaging motion structure is proposed. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model:

[0006] This invention provides a retinoscope bulb filament imaging motion structure to solve the technical problems existing in the background art.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] An imaging motion structure for a retinoscope bulb filament includes:

[0010] Observation film housing assembly, dustproof lens housing assembly, rotating lamp holder assembly, and lamp wick assembly;

[0011] The rotating lamp holder assembly includes a condenser lens holder, a head connector, a lamp holder clamping sleeve, a lamp holder clamping pin, an elastic slip ring, a focus adjustment limiting pin, a lampshade, a light-shielding bearing, and a condenser lens;

[0012] The lamp core assembly includes a lamp holder, an insulating post, a middle cell, and a bulb;

[0013] The lamp holder has circumferentially distributed grooves, and the lamp holder clamping sleeve has matching bosses, with the grooves and bosses being circumferentially positioned and engaged.

[0014] The lamp holder clamping sleeve is provided with a racetrack-shaped long groove, and the cylindrical end of the focusing adjustment limit pin passes into the racetrack-shaped long groove to form an axial guiding fit;

[0015] The elastic slip ring has several positioning protrusions inside, and the lamp holder clamping sleeve has positioning grooves corresponding to the positioning protrusions. The elastic slip ring has elastic protrusions on the outside, and the elastic protrusions elastically abut against the inner wall of the condenser lens holder.

[0016] A further improvement is that the middle battery cell is equipped with a limiting step, and the insulating column is equipped with an anti-detachment protrusion. The limiting step and the anti-detachment protrusion work together to form an axial floating limit, preventing the middle battery cell from falling off and allowing small axial stroke movement.

[0017] A further improvement is that the axial movement range of the middle cell relative to the insulating column is 1.0mm to 2.0mm.

[0018] A further improvement is that the lamp core assembly and the lamp cover are in elastic contact, relying on elastic force to prevent the lamp core assembly from falling off under the action of gravity.

[0019] A further improvement is that the elastic protrusion of the elastic slip ring elastically compresses the inner circumferential surface of the condenser lens mount, providing axial friction force, so that the condenser lens mount can be positioned at any position in the axial direction.

[0020] A further improvement is that the rotating condenser lens mount drives the lamp holder, lamp holder and lamp core assembly to rotate 360° synchronously through the focusing adjustment limit pin, thereby achieving rotational centering of the light strip.

[0021] A further improvement is that the condenser lens mount is pushed and pulled axially, so that the condenser lens moves axially relative to the lamp core assembly, thereby achieving adjustment of the light band focusing, parallelism and divergence.

[0022] A further improvement is that the lamp wick assembly and the lamp cover are in a pluggable clearance fit, and the bulb and the lamp holder are detachably connected, meaning that the lamp wick assembly can be pulled out as a whole, and the bulb can be replaced by unscrewing it separately from the lamp holder.

[0023] A further improvement is that the middle battery cell is axially slidingly fitted with the insulating column, and the front end of the middle battery cell abuts against the electrode of the bulb, preventing the bulb from being damaged by force and avoiding poor contact.

[0024] A further improvement is that by rotating or axially pushing and pulling the same condenser mount with one hand, the rotation adjustment of the light band and the focusing and divergence adjustment of the light band can be achieved respectively.

[0025] A further improvement is that the lamp holder has at least three grooves and the lamp holder clamping sleeve has at least three bosses, which are evenly distributed circumferentially. The lamp holder and the lamp holder clamping sleeve adopt a three-point groove-boob engagement to ensure rotational alignment and reduce light strip offset and flicker.

[0026] A further improvement is that it also includes a head shell ring that is fixedly fitted onto the outside of the head connector.

[0027] 3. Beneficial effects:

[0028] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0029] 1. The bulb replacement of this utility model is flexible and convenient. The bulb wick assembly can be pulled out as a whole and then unscrewed to replace the bulb with a new one, making bulb replacement easy.

[0030] 2. The lamp wick assembly and lamp cover of this utility model are in elastic contact, which can prevent the lamp wick assembly from falling off freely under the action of gravity, making the structure more reliable;

[0031] 3. The axially floating central cell of this utility model can prevent poor contact of the bulb, provide long-distance power supply, and prevent the bulb from being damaged by excessive force.

[0032] 4. The rotation of the bulb in this utility model ensures that the bulb position will not slide down during the rotation process through the elastic deformation of the plastic, the rotation is smooth, and the three-point contact ensures the centering of the bulb and improves the optical performance of the retinoscope.

[0033] 5. With this invention, the operator only needs to rotate the condenser lens mount with one hand to achieve the rotational movement of the ribbon light, and at the same time, the focusing and divergence of the ribbon light can be achieved, reducing the user's operation steps and realizing true one-handed operation. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0035] Figure 2 This utility model Figure 1 A schematic diagram of the explosion unfolding state;

[0036] Figure 3 This is a schematic diagram of the rotating lamp holder assembly of this utility model;

[0037] Figure 4 This is a schematic diagram of the lamp wick assembly structure of this utility model;

[0038] Figure 5 This is a schematic diagram of the battery cell structure in this utility model;

[0039] Figure 6 This is a schematic diagram of the insulating column structure of this utility model;

[0040] Figure 7 This is a schematic diagram of the condenser lens mount structure of this utility model;

[0041] Figure 8This is a schematic diagram of the lamp holder clamping sleeve structure of this utility model;

[0042] Figure 9 This is a schematic diagram of the focusing adjustment limiting pin structure of this utility model;

[0043] Figure 10 This is a schematic diagram of the elastic slip ring structure of this utility model;

[0044] Figure 11 This utility model Figure 10 A schematic diagram of the enlarged structure of the elastic protrusion;

[0045] Figure 12 This is a schematic diagram of the lamp holder structure of this utility model;

[0046] Figure 13 This is a schematic diagram of the light-shielding bearing structure of this utility model.

[0047] Figure label:

[0048] 1-Observation film housing assembly, 2-Dustproof lens housing assembly, 3-Condenser lens mount, 31-Inner circumferential surface of lens mount, 4-Head connector, 5-Lamp holder clamping sleeve, 51-Racetrack-shaped long groove, 52-Positioning groove, 53-Protrusion, 6-Lamp holder clamping pin, 7-Elastic slip ring, 71-Positioning protrusion, 72-Elastic protrusion, 8-Focus adjustment limiting pin, 81-Cylindrical end, 9-Lamp cover, 10-Light shielding bearing, 11-Lamp holder, 1101-Groove, 12-Insulating post, 1201-Anti-detachment protrusion, 13-Central battery cell, 1301-Limiting step, 14-Lamp bulb, 15-Head housing ring, 16-Condenser lens. Detailed Implementation

[0049] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] It should be noted that the structures not described in this utility model do not involve the design points and improvement directions of this utility model and all adopt existing technologies.

[0052] This embodiment provides a retinoscope bulb filament imaging motion structure, such as... Figures 1 to 13 As shown, the assembly includes an observation film housing assembly 1, a dustproof lens housing assembly 2, a rotating lamp holder assembly, and a lamp wick assembly; the rotating lamp holder assembly includes a condenser lens holder 3, a head connector 4, a lamp holder clamping sleeve 5, a lamp holder clamping pin 6, an elastic slip ring 7, a focus adjustment limiting pin 8, a lamp cover 9, a light-shielding bearing 10, and a condenser lens 16; the lamp wick assembly includes a lamp holder 11, an insulating post 12, a middle battery cell 13, and a bulb 14.

[0053] The head shell ring 15 is fixedly sleeved on the outside of the head connector 4, and together with the observation film shell assembly 1 and the dustproof lens shell assembly 2, it forms the front shell of the retinoscope, providing protection and support for the internal rotating lamp holder assembly and lamp wick assembly.

[0054] Condenser 16 is fixedly installed inside the front end of condenser mount 3. The two are fixed relative to each other and do not rotate or move axially. Condenser mount 3 is sleeved on the outside of head connector 4 and can rotate 360° circumferentially relative to head connector 4. It can also slide back and forth along the axis. Focusing adjustment limit pin 8 is fixedly installed on condenser mount 3. Its axis is set radially and rotates and moves axially synchronously with condenser mount 3.

[0055] The lamp holder clamping sleeve 5 is fitted on the outside of the lamp core assembly. The lamp holder clamping pin 6 positions the lamp holder clamping sleeve 5 and the internal components circumferentially to prevent relative rotation. The lamp holder clamping sleeve 5 has a racetrack-shaped long groove 51 extending axially. The cylindrical end 81 of the focusing adjustment limit pin 8 extends into the racetrack-shaped long groove 51, which can slide axially along the racetrack-shaped long groove 51 and drive the lamp holder clamping sleeve 5 to rotate synchronously in the circumferential direction.

[0056] An elastic slip ring 7 is fitted onto the outside of the lamp holder clamping sleeve 5. The interior of the elastic slip ring 7 has several positioning protrusions 71. The lamp holder clamping sleeve 5 has positioning grooves 52 corresponding to the positioning protrusions 71. The exterior of the elastic slip ring 7 has at least three circumferentially evenly distributed elastic protrusions 72. The positioning protrusions 71 inside the elastic slip ring 7 engage with the positioning grooves 52, and the elastic protrusions 72 outside the elastic slip ring 7 elastically abut against the inner circumferential surface 31 of the condenser lens mount 3. Through elastic deformation, a continuous axial friction force is generated, allowing the condenser lens mount 3 to remain at any position after axial pushing and pulling, achieving stepless and continuously adjustable axial positioning. The lampshade 9 is fixedly connected to the head connector 4, and the light-shielding bearing 10 is disposed in the optical path to block stray light and provide rotational support.

[0057] The lamp core assembly is detachably installed inside the lamp cover 9. The lamp core assembly and the lamp cover 9 are in elastic contact. When no external force is applied, the elastic force can prevent the lamp core assembly from falling off by gravity.

[0058] The insulating post 12 is fixedly installed inside the lamp holder 11 to achieve electrical insulation. The middle battery 13 is inserted into the central hole of the insulating post 12 and forms an axial floating fit with the insulating post 12. The middle battery 13 is provided with a limiting step 1301, and the insulating post 12 is provided with an anti-detachment protrusion 1201. The limiting step 1301 and the anti-detachment protrusion 1201 limit each other, which not only restricts the middle battery 13 from coming out, but also allows the middle battery 13 to move axially within a small range (such as 1.0mm to 2.0mm), so as to avoid pressing the bulb 14 and causing damage or poor contact. The bulb 14 is installed at the front end of the lamp holder 11 and abuts against the electrode of the middle battery 13.

[0059] The outer wall of the lamp holder 11 is provided with three circumferentially evenly distributed grooves 1101, and the inner wall of the lamp holder clamping sleeve 5 is provided with three corresponding protrusions 53. The grooves 1101 and the protrusions 53 are interlocked to realize the circumferential synchronous rotation of the lamp holder 11 and the lamp holder clamping sleeve 5, ensuring good centering, no deviation, and no shaking during the rotation process.

[0060] The working process of this embodiment is as follows:

[0061] Light strip rotation adjustment: Rotate the condenser lens base 3 with one hand. The condenser lens base 3 drives the focus adjustment limit pin 8 to rotate. The focus adjustment limit pin 8 drives the lamp holder clamp sleeve 5 to rotate. The lamp holder clamp sleeve 5 drives the lamp holder 11, the middle battery cell 13, and the bulb 14 to rotate synchronously through the groove and the boss. This achieves 360° rotation and centering of the light strip. The rotation is smooth, flicker-free, and without deviation.

[0062] Light band focusing / divergence adjustment: Push and pull the condenser lens mount 3 along the axis with one hand. The condenser lens mount 3 drives the condenser lens 16 to move axially relative to the bulb 14, changing the distance between the bulb filament and the condenser lens 16, thereby realizing the convergence, parallelism and divergence adjustment of the light band; the elastic slip ring 7 generates axial friction force through the elastic deformation between its elastic protrusion 72 and the inner circumferential surface 31 of the condenser lens mount 3, so that the condenser lens mount 3 can be stopped at any axial position.

[0063] Bulb replacement: Simply pull the entire bulb assembly out of the lamp cover 9, unscrew the old bulb 14, replace the bulb with a new one, and then insert the bulb assembly back into the lamp cover 9. The replacement is quick and easy, and the battery cell 13 will not fall off during the replacement process.

[0064] In this embodiment, the rotation and centering of the light strip and the focus adjustment can be completed simultaneously by rotating and pushing / pulling the condenser lens mount 3 with one hand. The operation is simple, the optical stability is high, and the bulb has a long service life.

[0065] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A retinoscope bulb filament imaging motion structure, characterized in that, include: Observation film housing assembly (1), dustproof lens housing assembly (2), rotating lamp holder assembly and lamp wick assembly; The rotating lamp holder assembly includes a condenser lens holder (3), a head connector (4), a lamp holder clamping sleeve (5), a lamp holder clamping pin (6), an elastic slip ring (7), a focus adjustment limiting pin (8), a lamp cover (9), a light-shielding bearing (10), and a condenser lens (16). The lamp core assembly includes a lamp holder (11), an insulating post (12), a middle cell (13), and a bulb (14). The lamp holder (11) is provided with circumferentially distributed grooves (1101), and the lamp holder clamping sleeve (5) is provided with matching bosses (53). The grooves (1101) and the bosses (53) are circumferentially positioned and engaged. The lamp holder clamping sleeve (5) is provided with a racetrack-shaped long groove (51), and the cylindrical end (81) of the focusing adjustment limit pin (8) is inserted into the racetrack-shaped long groove (51) to form an axial guide fit; The elastic slip ring (7) has several positioning protrusions (71) inside, and the lamp holder clamping sleeve (5) has positioning grooves (52) corresponding to the positioning protrusions (71). The elastic slip ring (7) has elastic protrusions (72) on the outside, and the elastic protrusions (72) elastically abut against the inner wall of the condenser lens holder (3).

2. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, The middle battery cell (13) is provided with a limiting step (1301), and the insulating column (12) is provided with an anti-detachment boss (1201). The limiting step (1301) and the anti-detachment boss (1201) cooperate to form an axial floating limit, which prevents the middle battery cell (13) from falling off and allows small axial stroke movement.

3. The imaging motion structure of a retinoscope bulb filament according to claim 2, characterized in that, The axial movement range of the middle cell (13) relative to the insulating column (12) is 1.0 mm to 2.0 mm.

4. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, The lamp core assembly and the lamp cover (9) are in elastic contact, and the elastic force is used to prevent the lamp core assembly from falling off under the action of gravity.

5. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, The elastic protrusion (72) of the elastic slip ring (7) is elastically pressed against the inner circumferential surface (31) of the condenser lens mount (3) to provide axial friction force, so that the condenser lens mount (3) can be positioned at any position in the axial direction.

6. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, The lamp core assembly and the lamp cover (9) are in a pluggable clearance fit, and the bulb (14) and the lamp holder (11) are detachably connected.

7. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, The middle battery cell (13) is axially slidingly fitted with the insulating post (12), and the front end of the middle battery cell (13) abuts against the electrode of the bulb (14).

8. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, The lamp holder (11) has at least three grooves (1101) and the lamp holder clamping sleeve (5) has at least three bosses (53) that are evenly distributed circumferentially.

9. The imaging motion structure of a retinoscope bulb filament according to claim 1, characterized in that, It also includes a head shell ring (15) that is fixedly sleeved on the outside of the head connector (4).

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