A dotting mechanism for a lensometer

Abstract

The utility model belongs to the technical field of lensmeter, especially point mechanism of lensmeter, including base and point mechanism setting on base, point mechanism includes three point needle, the point head of point needle is single point structure that can print out single point on lens or long strip structure that can print out horizontal line on lens, the point head of single point structure and the point head of long strip structure are located on same horizontal line, and the point head of at least one point needle is long strip structure. The utility model replaces three single point mark parts or all with horizontal line mark, namely, the original abstract "three points" that need human interpretation become concrete and intuitive "point line combination", thereby directly solving the problems of existing lens processing alignment difficulty and error-prone, effectively improving the identification of lens mark, reducing the alignment difficulty of reference line, obviously reducing the waste piece rate, and having higher economic benefit.

Description

Technical Field

[0001] This utility model belongs to the field of focimeter technology, and specifically refers to a dotting mechanism for a focimeter. Background Technology

[0002] A focimeter is a core device in the eyewear industry used to measure key parameters such as the optical center, astigmatic axis, and pupillary distance of lenses. After measurement, a marking mechanism typically prints marks on the lens to ensure precise alignment of the lens's optical center with the suction cup center during subsequent edging processing, guaranteeing accuracy. Most mainstream focimeters on the market employ a three-pin marking mechanism, where three pins simultaneously print three independent single-dot marks on the lens, respectively identifying the lens's optical center and the direction of the horizontal reference line.

[0003] However, this traditional single-point marking method has significant drawbacks in practical applications: the three single-point marks appear small and scattered on the lens, especially when processing rimless or semi-rimless glasses, where the lens edges require extensive grinding, which can cause the markings to be worn away or become difficult to identify. Furthermore, in the subsequent suction cup fixing process, operators need to visually identify these three scattered points and mentally construct a horizontal baseline to align the suction cup's reference axis with this line. This process not only demands a high level of experience and eyesight from the operator but is also highly susceptible to misjudgment due to visual fatigue, light reflection, or interference from the lens coating color. Even seemingly minor angular deviations can cause axis errors after edge grinding, severely affecting the optical performance of the finished lens and even rendering it unusable. Summary of the Invention

[0004] The purpose of this invention is to provide a dot-marking mechanism for a focimeter, which replaces some or all of the existing three single-point marks with horizontal line marks, effectively improving the recognition of lens marks and thus reducing the difficulty of aligning the baseline.

[0005] This utility model is implemented as follows: A dotting mechanism for a focimeter includes a base and a dotting mechanism disposed on the base. The dotting mechanism includes three dotting needles arranged side by side at equal intervals. The dotting head of the dotting needle can print a single dot structure on the lens or a horizontal strip structure on the lens. The dotting head of the single dot structure and the dotting head of the strip structure are located on the same horizontal straight line, and at least one dotting needle has a dotting head of the strip structure.

[0006] In the above-mentioned dotting mechanism of a focimeter, the dotting head of the dotting needle is made of rubber or PU material.

[0007] In the aforementioned dotting mechanism of a focimeter, the dotting head of the middle dotting needle is a single-point structure, and the dotting heads of the two dotting needles on both sides are long strip structures. Furthermore, the bottom surfaces of the dotting heads of the two dotting needles on both sides are symmetrically distributed and can conform to the curved surface of the lens.

[0008] In the above-mentioned focimeter marking mechanism, the base is vertically slidably connected to a lifting marking seat, and the lifting marking seat is hinged to a marking rocker arm via a transverse rotating shaft. A return torsion spring with elasticity is provided between the marking rocker arm and the lifting marking seat, which can drive the marking rocker arm to rotate backward. The marking needle is located at one end of the marking rocker arm, and the other end of the marking rocker arm is the handle drive end. When the marking rocker arm rotates forward until the marking needle head is vertically downward, the marking rocker arm is restricted from continuing to rotate forward by a limiting structure one. A limiting structure two is provided on the base to restrict the marking rocker arm from rotating backward.

[0009] In the above-mentioned focimeter marking mechanism, the limiting structure is a limiting bolt screwed onto the marking rocker arm, the tail end of the limiting bolt passing through the marking rocker arm and being fixed by an assembly nut.

[0010] In the above-mentioned dotting mechanism of a focimeter, an ink cartridge is provided on the base located behind the dotting needle. An absorbent sponge soaked in ink is provided inside the ink cartridge. An ink-dip port corresponding to the position of the dotting needle is opened on the front side wall of the ink cartridge. The ink-dip port allows the dotting head of the corresponding dotting needle to be inserted from front to back to abut against the absorbent sponge, and the absorbent sponge is the second limiting structure.

[0011] In the above-mentioned dotting mechanism of a focimeter, the front sidewall of the ink cartridge is a downwardly inclined end face with an inclination angle of 5°-10°.

[0012] In the above-mentioned focimeter marking mechanism, a return spring with elastic force is provided between the lifting marking seat and the base, which can drive the lifting marking seat to slide upward. The lifting marking seat has a limiting lifting stop that can abut against the base to limit the lifting marking seat from continuing to slide upward.

[0013] The outstanding advantages of this utility model compared to the prior art are: This utility model has a simple structure, reasonable design, and convenient use. By replacing some or all of the existing three single-point marks with horizontal line marks, the original abstract "three points" that require human interpretation are transformed into a concrete and intuitive "dot-line combination". This directly solves the problems of difficult alignment and easy error in existing lens processing, effectively improves the recognition of lens marks, reduces the difficulty of aligning the baseline, significantly reduces the scrap rate, and has high economic benefits. Attached Figure Description

[0014] Figure 1This is an overall view of the dotting needle of this utility model inserted into the ink cartridge; Figure 2 This is an overall view of the vertically downward dotting needle of this utility model.

[0015] In the diagram: 1. Base; 2. Dot; 3. Single-point structure; 4. Long strip structure; 5. Lifting dot base; 6. Dot rocker arm; 7. Limit bolt; 8. Ink cartridge; 9. Ink dispensing port; 10. Return spring. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —2: A dotting mechanism for a focimeter includes a base 1 and a dotting mechanism disposed on the base 1. The dotting mechanism includes three dotting needles 2 arranged side by side at equal intervals. The dotting head of the dotting needle 2 is either a single-dot structure 3 that can print a single dot on the lens or a horizontal strip structure 4 that can print a horizontal line on the lens. The dotting head of the single-dot structure 3 and the dotting head of the strip structure 4 are located on the same horizontal straight line, and at least one dotting needle 2 has a dotting head of the strip structure 4.

[0017] This utility model has a simple structure, reasonable design, and convenient use. By replacing some or all of the existing three single-point marks with horizontal line marks, the original abstract "three points" that require human interpretation are transformed into a concrete and intuitive "dot-line combination". This directly solves the problems of difficult alignment and easy error in existing lens processing, effectively improves the recognition of lens marks, reduces the difficulty of aligning the baseline, significantly reduces the scrap rate, and has high economic benefits.

[0018] Furthermore, to avoid damage to the mirror surface caused by the dotting head, the dotting head of the dotting needle 2 is made of rubber or PU material.

[0019] Furthermore, in this embodiment, the dotting needle 2 located in the middle has a single-point structure 3, while the dotting needles 2 on both sides have elongated structures 4. The bottom surfaces of the dotting needles 2 on both sides are symmetrically distributed and can conform to the curved surface of the lens. This employs a combination of "line, point, line," retaining the basic concept of traditional "three-point" positioning, allowing operators to immediately understand the center point position while also obtaining a more intuitive linear reference.

[0020] Furthermore, in this embodiment, the specific structure of the dotting mechanism is as follows: a lifting dotting seat 5 is slidably connected to the base 1 vertically; a dotting rocker arm 6 is hinged to the lifting dotting seat 5 via a transverse pivot; a return torsion spring is provided between the dotting rocker arm 6 and the lifting dotting seat 5, which has elasticity to drive the dotting rocker arm 6 to rotate backward; the dotting needle 2 is located at one end of the dotting rocker arm 6; the other end of the dotting rocker arm 6 is a handle drive end; when the dotting rocker arm 6 rotates forward until the dotting head of the dotting needle 2 is vertically downward, the dotting rocker arm 6 is restricted from continuing to rotate forward by a limiting structure one; a limiting structure two is provided on the base 1 to limit the backward rotation position of the dotting rocker arm 6. The limiting structure one and the limiting structure two together limit the range of the forward and backward rotation angle of the dotting rocker arm 6 and the dotting needle 2.

[0021] Furthermore, in order to reasonably simplify the structure and the number of parts, the limiting structure is a limiting bolt 7 screwed onto the dotting rocker arm 6, and the tail end of the limiting bolt 7 passes through the dotting rocker arm 6 and is fixed by the assembly nut.

[0022] In order to add ink to the dotting head of the dotting needle 2, an ink cartridge 8 is provided on the base 1 located behind the dotting needle 2. The ink cartridge 8 contains an absorbent sponge soaked in ink. The front side wall of the ink cartridge 8 has an ink-dip port 9 that corresponds to the position of the dotting needle 2. The ink-dip port 9 allows the dotting head of the corresponding dotting needle 2 to be inserted from front to back to abut against the absorbent sponge, and the absorbent sponge is the second limiting structure.

[0023] Furthermore, in order to facilitate the effective insertion of the ink cartridge 8 by rotating it counterclockwise from front to back, the front sidewall of the ink cartridge 8 is a downwardly inclined end face with an inclination angle of 5°-10°.

[0024] Furthermore, in this embodiment, a return spring 10 is provided between the lifting marking seat 5 and the base 1, which has elasticity to drive the lifting marking seat 5 to slide upward. The lifting marking seat 5 has a limiting lifting baffle that can abut against the base 1 to limit the lifting marking seat 5 from continuing to slide upward.

[0025] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A dotting mechanism for a focimeter, comprising a base (1) and a dotting mechanism disposed on the base (1), characterized in that: The dotting mechanism includes three dotting needles (2) arranged side by side at equal intervals. The dotting head of the dotting needle (2) is a single dot structure (3) that can print a single dot on the lens or a long strip structure (4) that can print a horizontal line on the lens. The dotting head of the single dot structure (3) and the dotting head of the long strip structure (4) are located on the same horizontal straight line, and at least one dotting needle (2) has a long strip structure (4).

2. The dotting mechanism of a focimeter according to claim 1, characterized in that: The dotting head of the dotting needle (2) is made of rubber or PU material.

3. The dotting mechanism of a focimeter according to claim 1, characterized in that: The dotting needle (2) located in the middle has a single dotting head (3), and the dotting heads of the two dotting needles (2) on both sides are long strips (4). The bottom surfaces of the dotting heads of the two dotting needles (2) on both sides are symmetrically distributed and can fit the curved surface of the lens.

4. The dotting mechanism of a focimeter according to claim 1, characterized in that: The base (1) is vertically slidably connected to a lifting dotting seat (5), and the lifting dotting seat (5) is hinged to a dotting rocker arm (6) via a transverse rotating shaft. A reset torsion spring is provided between the dotting rocker arm (6) and the lifting dotting seat (5) to drive the dotting rocker arm (6) to flip backward. The dotting needle (2) is located at one end of the dotting rocker arm (6), and the other end of the dotting rocker arm (6) is the handle drive end. When the dotting rocker arm (6) flips forward until the dotting head of the dotting needle (2) is vertically downward, the dotting rocker arm (6) is restricted from continuing to flip forward by the limiting structure one. The base (1) is provided with a limiting structure two that can restrict the dotting rocker arm (6) to flip backward.

5. The dotting mechanism of a focimeter according to claim 4, characterized in that: The limiting structure is a limiting bolt (7) screwed onto the dotting rocker arm (6). The tail end of the limiting bolt (7) passes through the dotting rocker arm (6) and is fixed by an assembly nut.

6. The dotting mechanism of a focimeter according to claim 4, characterized in that: An ink cartridge (8) is provided on the base (1) located behind the dotting needle (2). An absorbent sponge soaked in ink is provided inside the ink cartridge (8). An ink-dipped port (9) corresponding to the position of the dotting needle (2) is provided on the front side wall of the ink cartridge (8). The ink-dipped port (9) allows the dotting head of the corresponding dotting needle (2) to be inserted from front to back to abut against the absorbent sponge. The absorbent sponge is the second limiting structure.

7. The dotting mechanism of a focimeter according to claim 6, characterized in that: The front sidewall of the ink cartridge (8) is a downwardly inclined end face with an inclination angle of 5°-10°.

8. The dotting mechanism of a focimeter according to claim 4, characterized in that: A return spring (10) is provided between the lifting marking seat (5) and the base (1) to drive the lifting marking seat (5) to slide upward. The lifting marking seat (5) has a limiting lifting baffle that can abut against the base (1) to limit the lifting marking seat (5) from continuing to slide upward.

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