CN117803876A - Floodlight-gathering combined lighting lamp - Google Patents

Floodlight-gathering combined lighting lamp Download PDF

Info

Publication number
CN117803876A
CN117803876A CN202410123629.9A CN202410123629A CN117803876A CN 117803876 A CN117803876 A CN 117803876A CN 202410123629 A CN202410123629 A CN 202410123629A CN 117803876 A CN117803876 A CN 117803876A
Authority
CN
China
Prior art keywords
lamp
floodlight
assembly
light
annular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410123629.9A
Other languages
Chinese (zh)
Inventor
胡兴
张文华
朱文安
刘共升
胡金强
黄武能
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huizhou Chuangjian Industrial Co ltd
Shenzhen Shangwei Intelligent Health Lighting Co ltd
Shenzhen Seva Lighting Co Ltd
Original Assignee
Huizhou Chuangjian Industrial Co ltd
Shenzhen Shangwei Intelligent Health Lighting Co ltd
Shenzhen Seva Lighting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huizhou Chuangjian Industrial Co ltd, Shenzhen Shangwei Intelligent Health Lighting Co ltd, Shenzhen Seva Lighting Co Ltd filed Critical Huizhou Chuangjian Industrial Co ltd
Priority to CN202410123629.9A priority Critical patent/CN117803876A/en
Publication of CN117803876A publication Critical patent/CN117803876A/en
Pending legal-status Critical Current

Links

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention discloses a floodlight-gathering combined illuminating lamp, which comprises: the lamp body assembly comprises a lamp body shell, a power supply assembly and a control circuit board, wherein the power supply assembly and the control circuit board are arranged in the lamp body shell; the lamp cap assembly is arranged at one end of the lamp body assembly and comprises a lamp cap shell, and a spotlight assembly and a floodlight assembly are arranged in the lamp cap shell; the power supply assembly, the spotlight assembly and the floodlight assembly are all connected with the control circuit board; one end of the light emergent side of the lamp holder shell is also provided with a light-transmitting lens. The invention solves the problem of single lighting mode of the existing lighting lamp.

Description

Floodlight-gathering combined lighting lamp
Technical Field
The invention relates to the technical field of illuminating lamps, in particular to a floodlight-gathering combined illuminating lamp.
Background
The mobile handheld lighting lamp is widely applied to various places due to the convenience, such as outdoor activity lighting, emergency rescue lighting, industrial maintenance lighting and the like. The existing lamps are divided into a spotlight lamp and a floodlight lamp. The spotlight is used for concentrating light rays and realizing long-distance illumination and the like, and the floodlight is used for diverging light rays and carrying out wide-range illumination. With the complex and diverse lighting scenes, the conventional lamp with a single lighting mode cannot meet the requirements of users.
Disclosure of Invention
The invention mainly aims to provide a floodlight-gathering combined illuminating lamp, which aims to solve the problem of single illumination mode of the existing illuminating lamp.
In order to achieve the above object, the present invention provides a floodlight comprising:
the lamp body assembly comprises a lamp body shell, a power supply assembly and a control circuit board, wherein the power supply assembly and the control circuit board are arranged in the lamp body shell;
the lamp cap assembly is arranged at one end of the lamp body assembly and comprises a lamp cap shell, and a spotlight assembly and a floodlight assembly are arranged in the lamp cap shell; the power supply assembly, the spotlight assembly and the floodlight assembly are all connected with the control circuit board;
the spotlight component is arranged at one end of the lamp cap shell and comprises a laser bracket connected with the lamp cap shell and a laser lamp arranged on the laser bracket, and a light outlet corresponding to the laser lamp is formed in the center of the end part of the lamp cap shell; the lamp cap shell is also provided with a light hole coaxial with the light outlet along the axial direction of the lamp cap shell, the diameter of the light hole is larger than that of the light outlet, a biconvex lens is arranged at the end part of the light hole, the diameter of the biconvex lens is set to be 53-57 mm, and the distance between the biconvex lens and the spotlight is set to be 33-37 mm;
the floodlight component is arranged at the other end of the lamp cap shell, an annular mounting table is arranged on the lamp cap shell along the periphery of the biconvex lens, and the floodlight component is arranged on the annular mounting table; the floodlight assembly comprises an annular lamp panel, a plurality of floodlight beads are uniformly distributed on the annular lamp panel, an annular reflecting plate is further arranged on the light emitting side of the annular lamp panel, and a plurality of reflecting cups which are in one-to-one correspondence with the floodlight beads are arranged on the annular reflecting plate;
one end of the light emergent side of the lamp holder shell is also provided with a light-transmitting lens.
Optionally, the laser bracket is provided with a threaded hole along the axial direction thereof, and the laser lamp is installed in the threaded hole through a threaded structure.
Optionally, a first annular sealing ring is abutted between the lamp cap shell and the laser bracket.
Optionally, be equipped with in the light trap and be used for installing the first annular installation step of biconvex lens, biconvex lens is kept away from one side of spotlight subassembly is equipped with first clamping ring, first clamping ring is used for with biconvex lens is fixed on the first annular installation step, first clamping ring passes through the screw fixation and is in on the annular mount table.
Optionally, a plurality of positioning columns are arranged on the annular lamp panel, and positioning holes which are in one-to-one correspondence with the positioning columns are formed in the annular reflecting plate.
Optionally, the lamp holder shell is provided with a second annular mounting step for mounting the light-transmitting lens, and a second annular sealing ring is abutted between the light-transmitting lens and the second annular mounting step.
Optionally, a second pressing ring for fixing the light-transmitting lens on the second annular mounting step is further installed at one end of the light-emitting side of the lamp cap shell, and the second pressing ring is connected with the lamp cap shell through a thread structure.
Alternatively, the laser lamp is set as a laser lamp with power of 20W, the floodlight beads are set as LED lamps with power of 15W, and the number of floodlight beads is set to six.
Optionally, a handle is further arranged on the side face of the lamp body shell, a control key is arranged on the handle, and the control key is connected with the control circuit board.
Optionally, the power supply assembly is configured as a plurality of rechargeable cylindrical lithium batteries, and a charging port for charging the power supply assembly and a discharging port for charging external equipment by outputting voltage of the power supply assembly are arranged at the bottom of the lamp body shell; the charging port and the discharging port are both connected with the control circuit board.
The invention has the beneficial effects that: the structure of the existing illuminating lamp is improved, and the spotlight component and the floodlight component are integrated in the lamp cap component, so that the multifunctional function of one lamp is realized, and different illumination environment requirements are met; the spotlight component is arranged in the center of one end of the lamp cap component, a biconvex lens is added in the light emergent direction of the spotlight component, the appropriate biconvex lens size and the distance between the biconvex lens and the spotlight component are selected, and the illumination distance and the illumination brightness of the spotlight component are improved; the floodlight subassembly is installed at the other end of lamp holder subassembly, and spotlight subassembly's light-emitting side promptly is annular setting, carries out floodlight illumination through reflection of light cup structure, satisfies the demand of extensive illumination, and whole structural design is simple, and power is little, and luminance is high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the whole structure of an illumination lamp of the invention;
FIG. 2 is a cross-sectional view of the entire structure of the illumination lamp of the present invention;
FIG. 3 is an exploded view of the lamp body assembly of the illumination lamp of the present invention;
FIG. 4 is an exploded view of the structure of the lamp cap assembly of the illumination lamp of the present invention;
FIG. 5 is a schematic view of the lamp cap shell of the lighting lamp of the present invention;
FIG. 6 is an exploded view of the structure of the floodlight assembly of the invention;
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
An embodiment of the present invention proposes a floodlight-gathering combined lighting lamp, referring to fig. 1 and 2, comprising:
the lamp body assembly 1, referring to fig. 3, the lamp body assembly 1 includes a lamp body shell 11, a power supply assembly 12 installed in the lamp body shell 11, and a control circuit board 13;
a lamp cap assembly 2 mounted at one end of the lamp body assembly 1, wherein the lamp cap assembly 2 comprises a lamp cap shell 21, a spotlight assembly 3 and a floodlight assembly 4 mounted in the lamp cap shell 21; the power supply assembly 12, the spotlight assembly 3 and the floodlight assembly 4 are all connected with the control circuit board 13;
referring to fig. 4 and 5, the spotlight assembly 3 is mounted at one end of the lamp holder shell 21, the spotlight assembly 3 includes a laser bracket 31 connected with the lamp holder shell 21, and a laser lamp 32 mounted on the laser bracket 31, and a light outlet 22 corresponding to the laser lamp 32 is formed in the center of the end of the lamp holder shell 21; the lamp holder shell 21 is also provided with a light hole 23 coaxial with the light outlet 22 along the axial direction thereof, the diameter of the light hole 23 is larger than that of the light outlet 22, a biconvex lens 24 is arranged at the end part of the light hole 23, the diameter of the biconvex lens 24 is set to be 53-57 mm, and the distance between the biconvex lens 24 and the spotlight is set to be 33-37 mm;
the floodlight assembly 4 is mounted at the other end of the lamp holder shell 21, an annular mounting table 25 is arranged on the periphery of the lamp holder shell 21 along the biconvex lens 24, and the floodlight assembly 4 is mounted on the annular mounting table 25; the floodlight assembly 4 comprises an annular lamp panel 41, a plurality of floodlight beads 42 are uniformly distributed on the annular lamp panel 41, an annular reflecting plate 43 is further arranged on the light emergent side of the annular lamp panel 41, and a plurality of reflecting cups 44 which are in one-to-one correspondence with the floodlight beads 42 are arranged on the annular reflecting plate 43;
a light-transmitting lens 26 is further mounted at one end of the light-emitting side of the lamp cap shell 21.
The embodiment improves the structure of the existing illuminating lamp, and integrates the spotlight component 3 and the floodlight component 4 in the lamp cap component 2, so that the multifunctional function of one lamp is realized, and different illumination environment requirements are met; wherein, the spotlight component 3 is arranged in the center of one end of the lamp cap component 2, a double-sided convex lens 24 is added in the light emergent direction of the spotlight component 3, and the appropriate size of the double-sided convex lens 24 and the interval between the double-sided convex lens 24 and the spotlight component 3 are selected, so that the illumination distance and the illumination brightness of the spotlight component 3 are improved; the floodlight assembly 4 is installed at the other end of lamp holder assembly 2, namely the light-emitting side of spotlight assembly 3, is annular setting, carries out floodlight illumination through reflection of light cup 44 structure, satisfies the demand of extensive illumination, and whole structural design is simple, and power is little, and luminance is high.
Specifically, the convex lens functions to focus light rays, converging the light rays to one focal point. The distance between the light source and the convex lens is moderate, so that light rays can be better focused in a required area, and the lighting effect is improved. Too close or too far apart may result in insufficient spreading or concentration of light rays, affecting the lighting effect. Therefore, in the present embodiment, the distance between the lenticular lens 24 and the spotlight is set to 33 to 37mm, and preferably, the distance is set to 15mm. Further, the laser lamp has a high degree of directionality, and the light beam is nearly parallel, enabling focusing of light in a relatively small area. This makes laser lamps advantageous in applications requiring precise illumination, such as illuminating a distant target or requiring high precision illumination tasks. The brightness of a laser lamp is higher than a typical light source because the laser beam can concentrate photons in a narrow area. This makes the laser lamp excellent in illumination applications requiring intense, remote projection, and therefore, in this embodiment, the spotlight source is a laser lamp, and the spotlight is matched with the lenticular lens 24, so that the illumination brightness and distance can be greatly improved, and the illumination can be realized without a high-power laser lamp, and the energy loss is reduced. In this embodiment, the laser lamp 32 is configured as a 20W laser lamp. For floodlight sources, the LED lamp has high-efficiency conversion characteristics, and most of electric energy is converted into visible light instead of heat energy. Compared with the traditional light source, the LED floodlight has higher energy efficiency, can provide brighter lighting effect, reduces energy consumption simultaneously, and has long service life, therefore, in the embodiment, the floodlight beads 42 are arranged as the LED lamps with the power of 15W, the number of the floodlight beads 42 is six, and other numbers can be designed according to actual production requirements.
Further, a screw hole is offered along its axial to laser bracket 31, laser lamp 32 pass through the helicitic texture install in screw hole, in this embodiment, laser lamp 32 passes through the helicitic texture installation, and structural design is simple, makes things convenient for the assembly of whole spotlight subassembly 3, still makes things convenient for the later stage to the change of laser lamp 32.
Further, the first annular sealing ring 27 is abutted between the lamp cap shell 21 and the laser bracket 31, so that stable lamination of the lamp cap shell 21 and the laser bracket 31 can be ensured, and the sealing performance of the joint is improved while the structural stability is ensured.
Further, a first annular mounting step 28 for mounting the lenticular lens 24 is disposed in the light hole 23, a first pressing ring 29 is disposed on a side, far away from the spotlight assembly 3, of the lenticular lens 24, the first pressing ring 29 is used for fixing the lenticular lens 24 on the first annular mounting step 28, and the first pressing ring 29 is fixed on the annular mounting table 25 through screws. In this embodiment, the biconvex lens 24 is correspondingly placed in the first annular mounting step 28 during mounting, then the compression ring is pressed at the edge of the biconvex lens, and the screw is locked, so that the whole structure is simple in design and convenient to assemble, the mounting stability of the biconvex lens 24 is ensured, looseness is prevented, and the irradiation effect of the light source is influenced.
Further, referring to fig. 6, the annular lamp panel 41 is provided with a plurality of positioning columns 45, the annular reflecting plate 43 is provided with positioning holes which are inserted in one-to-one correspondence with the positioning columns 45, in this embodiment, the annular lamp panel 41 and the annular reflecting plate 43 are inserted and fixed with the positioning columns 45 through the positioning holes, so that the assembly is convenient, and meanwhile, the positioning can be performed during the installation, the assembly efficiency is improved, and the connection stability of the two is ensured.
Further, the lamp cap shell 21 is provided with a second annular mounting step 210 for mounting the light-transmitting lens 26, and a second annular sealing ring 211 is abutted between the light-transmitting lens 26 and the second annular mounting step 210.
Further, a second press ring 212 for fixing the light-transmitting lens 26 on the second annular mounting step 210 is further mounted at one end of the light-emitting side of the lamp cap shell 21, and the second press ring 212 is connected with the lamp cap shell 21 through a screw structure.
In this embodiment, when the light-transmitting lens 26 guarantees normal light transmission, the light source inside can be effectively protected, and when the light-transmitting lens 26 is installed, only the light-transmitting lens 26 needs to be correspondingly installed on the second annular installation step 210, and then after the second pressing ring 212 is connected with the lamp holder shell 21, the light-transmitting lens 26 can be pressed on the second annular installation step 210, so that the operation is convenient, and in this embodiment, the second pressing ring 212 is connected with the lamp holder shell 21 through a thread structure, so that the convenience of assembly and the stability of the structure are further improved.
Further, a handle 14 is further provided on the side of the lamp body shell 11, a control key 15 is provided on the handle 14, and the control key 15 is connected with the control circuit board 13. In this embodiment, the user can conveniently carry the illumination lamp by adding the handle 14, and meanwhile, the added control key 15 can control the switch of the illumination lamp and the selection of the illumination mode, and the control key 15 is arranged on the handle 14, so that the user can further conveniently press the illumination lamp.
Further, the power supply assembly 12 is configured as a plurality of rechargeable cylindrical lithium batteries, and a charging port 16 for charging the power supply assembly 12 and a discharging port 17 for charging external equipment by outputting voltage of the power supply assembly 12 are arranged at the bottom of the lamp body shell 11; the charging port 16 and the discharging port 17 are connected to the control circuit board 13. In this embodiment, through setting up charging port 16 and discharge port 17, can conveniently charge power supply module 12, avoid the electric quantity not enough to influence the use, simultaneously, discharge port 17's setting can be when outdoor use, reverse other mobile device that supply the user charges, expands its function, promotes the convenience that the user used. Specifically, the line of sight of charging and discharging can be realized by integrating corresponding charging and discharging circuits on the control circuit board 13, which is the prior art and will not be described herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (10)

1. A polyflood combined lighting lamp, comprising:
the lamp body assembly comprises a lamp body shell, a power supply assembly and a control circuit board, wherein the power supply assembly and the control circuit board are arranged in the lamp body shell;
the lamp cap assembly is arranged at one end of the lamp body assembly and comprises a lamp cap shell, and a spotlight assembly and a floodlight assembly are arranged in the lamp cap shell; the power supply assembly, the spotlight assembly and the floodlight assembly are all connected with the control circuit board;
the spotlight component is arranged at one end of the lamp cap shell and comprises a laser bracket connected with the lamp cap shell and a laser lamp arranged on the laser bracket, and a light outlet corresponding to the laser lamp is formed in the center of the end part of the lamp cap shell; the lamp cap shell is also provided with a light hole coaxial with the light outlet along the axial direction of the lamp cap shell, the diameter of the light hole is larger than that of the light outlet, a biconvex lens is arranged at the end part of the light hole, the diameter of the biconvex lens is set to be 53-57 mm, and the distance between the biconvex lens and the spotlight is set to be 33-37 mm;
the floodlight component is arranged at the other end of the lamp cap shell, an annular mounting table is arranged on the lamp cap shell along the periphery of the biconvex lens, and the floodlight component is arranged on the annular mounting table; the floodlight assembly comprises an annular lamp panel, a plurality of floodlight beads are uniformly distributed on the annular lamp panel, an annular reflecting plate is further arranged on the light emitting side of the annular lamp panel, and a plurality of reflecting cups which are in one-to-one correspondence with the floodlight beads are arranged on the annular reflecting plate;
one end of the light emergent side of the lamp holder shell is also provided with a light-transmitting lens.
2. The floodlight-gathering combined lighting lamp as recited in claim 1, wherein the laser bracket is provided with a threaded hole along an axial direction thereof, and the laser lamp is mounted in the threaded hole through a threaded structure.
3. The floodlight-gathering combined lighting lamp as recited in claim 1, wherein a first annular sealing ring is abutted between the lamp cap shell and the laser bracket.
4. The floodlight gathering and combining lighting lamp as recited in claim 1, wherein a first annular mounting step for mounting the biconvex lens is arranged in the light hole, a first press ring is arranged on one side, away from the spotlight component, of the biconvex lens, the first press ring is used for fixing the biconvex lens on the first annular mounting step, and the first press ring is fixed on the annular mounting table through a screw.
5. The floodlight-gathering combined illuminating lamp according to claim 1, wherein a plurality of positioning columns are arranged on the annular lamp panel, and positioning holes which are in one-to-one correspondence with the positioning columns are formed in the annular reflecting plate.
6. The floodlight-gathering combined lighting lamp as recited in claim 1, wherein the lamp cap shell is provided with a second annular mounting step for mounting the light-transmitting lens, and a second annular sealing ring is abutted between the light-transmitting lens and the second annular mounting step.
7. The floodlight-gathering combined lighting lamp as recited in claim 6, wherein a second press ring for fixing the light-transmitting lens on the second annular mounting step is further installed at one end of the light-emitting side of the lamp cap shell, and the second press ring is connected with the lamp cap shell through a thread structure.
8. The floodlight-concentrating combined illumination lamp according to claim 1, wherein the laser lamp is set to a laser lamp with a power of 20W, the floodlight beads are set to LED lamps with a power of 15W, and the number of floodlight beads is set to six.
9. The floodlight combined lamp according to claim 1, wherein a handle is further arranged on the side face of the lamp body shell, a control key is arranged on the handle, and the control key is connected with the control circuit board.
10. The floodlight-gathering combined illuminating lamp according to claim 1, wherein the power supply assembly is provided with a plurality of rechargeable cylindrical lithium batteries, and a charging port for charging the power supply assembly and a discharging port for charging external equipment are arranged at the bottom of the lamp body shell; the charging port and the discharging port are both connected with the control circuit board.
CN202410123629.9A 2024-01-29 2024-01-29 Floodlight-gathering combined lighting lamp Pending CN117803876A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410123629.9A CN117803876A (en) 2024-01-29 2024-01-29 Floodlight-gathering combined lighting lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410123629.9A CN117803876A (en) 2024-01-29 2024-01-29 Floodlight-gathering combined lighting lamp

Publications (1)

Publication Number Publication Date
CN117803876A true CN117803876A (en) 2024-04-02

Family

ID=90420144

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202410123629.9A Pending CN117803876A (en) 2024-01-29 2024-01-29 Floodlight-gathering combined lighting lamp

Country Status (1)

Country Link
CN (1) CN117803876A (en)

Similar Documents

Publication Publication Date Title
WO2015180255A1 (en) Led flashlight with laser designator
US20230358506A1 (en) Led emergent light adjusting mechanism and inner-red-dot aiming device therefor
CN211551215U (en) Electric torch
CN117803876A (en) Floodlight-gathering combined lighting lamp
CN201273461Y (en) Electric torch
CN215336115U (en) High beam and low beam lens integrated device and high beam and low beam integrated lighting device
CN109099330B (en) Ultra-remote LED flashlight
CN212510582U (en) Campsite lamp reflection of light subassembly
CN101749628B (en) Lighting lamp and luminous element thereof
US20060176690A1 (en) Multi-function emergency ready light
CN208349017U (en) Light spotlight
CN220038300U (en) Lamp set
CN211502649U (en) Novel infrared correlation device
CN215951331U (en) LED lamp
CN220817669U (en) Portable emergency LED lamp
CN117803904A (en) High-efficient radiating light
CN113028307A (en) Electric torch
CN219875664U (en) Solar lamp device
CN220082865U (en) Flashlight light source switching structure
TWM507072U (en) LED lamp fixture with bluetooth positioning and searching functions
CN212361658U (en) Combined police flashlight
CN210069544U (en) Double-light-source LED flashlight
CN218295391U (en) LED (light-emitting diode) highlight flashlight with laser indicator
CN215221814U (en) Miniature energy storage system
CN220417109U (en) Tube lamp

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination