Microscopic melting point instrument

Abstract

The utility model relates to a physical and chemical experiment instrument, in particular to a microscopic melting point instrument which comprises a base, a mirror support and a lifting support are fixedly connected to the base, a microscopic assembly is installed on the mirror support, a lifting lead screw is rotationally connected to the lifting support, and a sliding seat is vertically connected to the lifting support in a sliding mode. The lifting lead screw is in transmission connection with a lifting motor, the sliding base is spirally connected to the lifting lead screw at the same time, and a heating base is fixedly connected to the sliding base. The heating base is vertically connected to the lifting support in a sliding mode, the lifting motor is used for driving the heating base to achieve the lifting action, the distance between the heating base and the microscopic assembly can be rapidly adjusted, then rapid focusing can be achieved during observation, the heating base can be rapidly moved after observation so that a large operation space can be obtained, operation is convenient, and the working efficiency is improved. Meanwhile, up-and-down movement of eyes is avoided, possible discomfort of a user is avoided, and the experiment efficiency is not prone to being affected.

Description

Technical Field

[0001] This utility model relates to a physical and chemical experimental instrument, and in particular to a micro melting point apparatus. Background Technology

[0002] A micro melting point apparatus is an experimental instrument used to observe physical changes in substances under heating conditions, such as deformation, color change, and transitions between the three states of matter. Traditional micro melting point apparatuses typically have their heating element fixed directly to a base. The focus is adjusted by moving the microscope assembly located above the heating element. During sample handling, to gain more operating space, the microscope assembly is usually moved upwards as much as possible. However, during observation, the limiting assembly needs to be moved downwards to achieve focus. These actions all require the user to manually adjust the focusing knob, making the operation rather cumbersome. Especially during observation, the eye needs to follow the movement of the microscope assembly, which can easily cause discomfort and affect experimental efficiency.

[0003] In view of this, the applicant has conducted in-depth research on the structure of the micro melting point apparatus, which led to this case. Utility Model Content

[0004] The purpose of this invention is to provide a micro melting point apparatus that is easy to operate and does not easily affect experimental efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A microscopic melting point apparatus includes a base, on which a mirror support and a lifting support are fixedly connected. A microscopic component is mounted on the mirror support. A vertically arranged lifting screw is rotatably connected to the lifting support and a slide is vertically slidably connected to it. A lifting motor mounted on the lifting support is drivenly connected to the lifting screw. The slide is helically connected to the lifting screw, and a heating seat located directly below the microscopic component is fixedly connected to the slide.

[0007] As an improvement of this utility model, a counterweight is vertically slidably connected to the lifting bracket, and a pulley is provided on the upper part of the lifting bracket. The weight of the counterweight is the same as that of the heating base, and a pull rope is fixedly connected between the counterweight and the heating base. The pull rope is also wound around the pulley.

[0008] As an improvement of this utility model, a cooling fan is provided on the heating base.

[0009] As an improvement of this utility model, the lower end of the base is equipped with four adjustable feet arranged in a matrix. Each adjustable foot includes a screw that is spirally connected to the base and arranged vertically, an adjusting block that is fixedly connected to the lower end of the screw, and a support plate that is rotatably connected to the lower end of the adjusting block.

[0010] As an improvement of this utility model, the base is provided with an operating device for controlling the working sequence of the lifting motor.

[0011] As an improvement of this utility model, the microscope assembly includes a housing, an objective lens vertically slidably connected to the housing, and a coarse adjustment knob and a fine adjustment knob for adjusting the relative position of the objective lens and the housing, respectively.

[0012] As an improvement of this utility model, the housing is vertically slidably connected to the mirror bracket, and a locking bolt that abuts against the mirror bracket is spirally connected to the housing.

[0013] As an improvement of this utility model, a detection head is installed on the slide, and multiple position sensing blocks arranged sequentially from top to bottom and respectively cooperating with the detection head are fixedly connected to the lifting bracket.

[0014] By adopting the above solution, this utility model has the following beneficial effects:

[0015] 1. By vertically sliding the heating seat onto the lifting bracket and using the lifting motor to drive the heating seat to achieve lifting action, the distance between the heating seat and the microscope components can be quickly adjusted. This allows for rapid focusing during observation and quick movement of the heating seat after observation to obtain a large operating space, making operation convenient. At the same time, since the limiting components can be moved almost without moving during focusing, the need for the eye to move up and down is avoided, preventing potential user discomfort and minimizing impact on experimental efficiency.

[0016] 2. By setting a counterweight to counteract the gravity received by the heating seat, the power required for the lifting motor to drive the heating seat to rise and fall is the same or as similar as possible. This helps to simplify the control system and allows for more accurate fine-tuning of the heating seat's position, thus achieving better focusing.

[0017] 3. By setting up a detection head and a sensing block, the height position of the heating seat can be quickly determined, thereby achieving rapid focusing in repeatable experiments and improving experimental efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the micro melting point apparatus of this utility model;

[0019] Figure 2This is a schematic diagram showing the results from another perspective of the micro melting point apparatus of this utility model. Some components are omitted in the above figure.

[0020] The corresponding markings in the diagram are as follows:

[0021] 10-Base; 11-Mirror stand;

[0022] 12-Lifting support; 13-Operating device;

[0023] 20 - Adjustable foot; 21 - Adjustable block;

[0024] 22 - Support sheet; 30 - Microscopic component;

[0025] 31-Shell; 32-Objective lens;

[0026] 33 - Coarse focus screw; 34 - Fine focus screw;

[0027] 35 - Locking bolt; 40 - Lifting screw;

[0028] 41-Slide; 42-Lifting motor;

[0029] 43-Heating base; 44-Counterweight;

[0030] 45 - Pull cord; 46 - Cooling fan. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 and Figure 2 As shown, this embodiment provides a microscopic melting point apparatus, including a base 10. A mirror support 11 and a lifting support 12 are fixedly connected to the base 10. Four adjustable feet 20 arranged in a matrix are installed at the lower end of the base 10. Each adjustable foot 20 includes a screw (not shown in the figure) that is spirally connected to the base 10 and arranged vertically, an adjusting block 21 that is fixedly connected to the lower end of the screw, and a support plate 22 that is rotatably connected to the lower end of the adjusting block 21. In this way, by rotating the adjusting block 21, the screw can be rotated, thereby adjusting the length of the screw spirally connected to the base 10, realizing the adjustment of the foot length and ensuring that the base 10 can be placed stably. At the same time, due to the presence of the support plate 22, the adjustment block 21 can be prevented from contacting the table during fine adjustment, thus avoiding affecting its rotation. Of course, the specific rotatable connection structure between the support plate 22 and the adjusting block 21 is a conventional structure, such as using an end face bearing for connection, etc., which will not be described in detail here.

[0033] A microscope assembly 30 is mounted on the mirror holder 11. This microscope assembly 30 is a binocular microscope assembly commonly used in micro melting point apparatuses, employing a 4x objective lens and a 10x eyepiece. It is commercially available. Specifically, the microscope assembly 30 includes a housing 31, an objective lens 32 vertically slidably connected to the housing 31, and a coarse focusing knob 33 and a fine focusing knob 34 for adjusting the relative position of the objective lens 32 and the housing 31, respectively. The housing 31 is vertically slidably connected to the mirror holder 11, and a locking bolt 35 is screwed onto the housing 31, abutting against the mirror holder 11. This allows the micro melting point apparatus provided in this embodiment to still use the conventional focusing method of micro melting point apparatuses, accommodating the usage habits of different users.

[0034] A vertically arranged lifting screw 40 is rotatably connected to the lifting bracket 12 and a slide block 41 is vertically slidably connected to it. A lifting motor 42 mounted on the top of the lifting bracket 12 is driven to the lifting screw 40. The slide block 41 is screwed to the lifting screw 40, and a heating seat 43 located directly below the objective lens 32 of the microscope assembly 30 is fixedly connected to the slide block 41. This allows the position of the heating seat 43 to be quickly adjusted by the lifting motor 42, enabling rapid focusing without moving the microscope assembly 30. Of course, the heating seat 43 is the same as that used in conventional microscopic melting point apparatuses. That is to say, the key point of this embodiment is to change the heating seat 43 of a conventional microscopic melting point apparatus from being fixedly connected to the base 10 to being vertically slidably connected to the lifting bracket 12, and to use the lifting motor 42 to drive the heating seat 43 to perform lifting and lowering actions.

[0035] Preferably, a counterweight 44 is vertically slidably connected to the lifting bracket 12. The counterweight 44 is located on the side of the lifting bracket 12 away from the heating seat 43. A pulley (not shown in the figure) is provided on the upper part of the lifting bracket 12. The weight of the counterweight 44 is the same as that of the heating seat 43 (allowing for a certain margin of error). A pull rope 45 is fixedly connected between the counterweight 44 and the heating seat 43, and the pull rope 45 is wound around the pulley. This allows the counterweight 44 to counteract the gravity acting on the heating seat 43, improving the accuracy of the heating seat 43's movement and thus ensuring accurate focusing.

[0036] Preferably, a cooling fan 46 is provided on the heating base 43, which can achieve rapid cooling and thus improve experimental efficiency.

[0037] Preferably, a detection head (not shown in the figure) is mounted on the slide 41, and multiple position sensing blocks (not shown in the figure) arranged sequentially from top to bottom and respectively cooperating with the detection head are fixedly connected to the lifting bracket 12. This allows for accurate positioning of the height of the heating seat 43 through the cooperation of the detection head and the position sensing blocks. In repeatable experiments, only the position of the heating seat 43 during the first experiment needs to be remembered. In subsequent experiments, the heating seat 43 can be quickly moved to the position of the first experiment, achieving rapid focusing and improving experimental efficiency. Of course, fine-tuning using the fine focusing knob 34 is necessary when needed.

[0038] In addition, the base 10 is provided with an operating device 13 for controlling the working sequence of the lifting motor 42. The specific structure and setting of the operating device are conventional and are not the focus of this embodiment, so they will not be described in detail here.

[0039] The present invention has been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, and these modifications all fall within the protection scope of the present invention.

Claims

1. A microscopic melting point apparatus, comprising a base, characterized in that, A mirror bracket and a lifting bracket are fixedly connected to the base. A microscope component is installed on the mirror bracket. A vertically arranged lifting screw is rotatably connected to the lifting bracket and a slide is vertically slidably connected to it. A lifting motor installed on the lifting bracket is driven to the lifting screw. The slide is also screwed to the lifting screw, and a heating seat located directly below the microscope component is fixedly connected to the slide.

2. The micro melting point apparatus as described in claim 1, characterized in that, A counterweight is vertically slidably connected to the lifting bracket, and a pulley is provided on the upper part of the lifting bracket. The weight of the counterweight is the same as that of the heating base, and a pull rope is fixedly connected between the counterweight and the heating base. The pull rope is also wound around the pulley.

3. The micro melting point apparatus as described in claim 1, characterized in that, The heating base is equipped with a cooling fan.

4. The micro melting point apparatus as described in claim 1, characterized in that, The lower end of the base is equipped with four adjustable feet arranged in a matrix. Each adjustable foot includes a screw that is spirally connected to the base and arranged vertically, an adjusting block that is fixedly connected to the lower end of the screw, and a support plate that is rotatably connected to the lower end of the adjusting block.

5. The micro melting point apparatus as described in claim 1, characterized in that, The base is equipped with an operating device for controlling the working sequence of the lifting motor.

6. The microscopic melting point apparatus according to any one of claims 1-5, characterized in that, The microscope assembly includes a housing, an objective lens vertically slidably connected to the housing, and a coarse adjustment knob and a fine adjustment knob for adjusting the relative position of the objective lens and the housing, respectively.

7. The micro melting point apparatus as described in claim 6, characterized in that, The housing is vertically slidably connected to the mirror bracket, and a locking bolt is spirally connected to the housing and abuts against the mirror bracket.

8. The micro melting point apparatus according to any one of claims 1-5, characterized in that, The slide is equipped with a detection head, and the lifting bracket is fixedly connected with a plurality of position sensing blocks arranged sequentially from top to bottom and respectively cooperating with the detection head.

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